• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The subject of the invention is a transparent, colorless and non-diffusing glass-ceramic plate of the lithium aluminosilicate type and containing crystals of β-quartz structure, the chemical composition of which does not contain oxides of arsenic, antimony and neodymium, and comprises the following constituents within the limits defined below expressed in weight percentages: SiO2 55-75%, in particular 60-70%, Al2O3 12-25%, in particular 19-24%, Li2O 2-5%, in particular 3-4%, Na2O + K2O 0- <2%, in particular 0-1%, Li2O + Na2O + K2O 0- <7%, in particular 0-5%, CaO 0.3-5%, MgO 0-5%, in particular 0-1%, SrO 0-5%, in particular 0-1%, BaO 0.5-10%, in particular 1-5%, CaO + BaO> 1%, in particular 3-5%, ZnO 0-5% , in particular 1-2%, TiO2 ≤1.9%, ZrO2 ≤3%, in particular 2-3%, TiO2 + ZrO2> 3.80%, SnO2 ≥0.1%, SnO2 / (SnO2 + ZrO2 + TiO2) <0.1, especially <0.06.
    公开号:FR3025793A1
    申请号:FR1458568
    申请日:2014-09-12
    公开日:2016-03-18
    发明作者:Kamila Plevacova；Emmanuel Lecomte；Cecile Jousseaume；Caro Richard Di
    申请人:Eurokera SNC；
    IPC主号:
    专利说明:

    [0001] 1 VITROCERAMIC PLATE The invention relates to the field of transparent, colorless and non-diffusing glass-ceramic plates, in particular used in cooking devices, as door panels or oven panes, or even as fireplace inserts.
    [0002] The aforementioned applications require plates having a high thermomechanical strength, in particular an excellent resistance to thermal shock, as well as a resistance to corrosive atmospheres at high temperature. Lithium aluminosilicate type glass-ceramics meet these particularly demanding specifications. These glass-ceramics are obtained by a two-step process: in a first step, precursor glass plates are obtained, which in a second step undergo a controlled crystallization treatment.
    [0003] This heat treatment, called "ceramization", makes it possible to grow within the glass crystals of 13-quartz or 13-spodumene structure (depending on the ceramization temperature), which generally have the particularity of having negative thermal expansion coefficients, so that the glass ceramic ultimately has a very low coefficient of thermal expansion. There are different kinds of glass-ceramic plates of the lithium aluminosilicate type. Those used in cooking devices, for example of the radiant or induction type, are generally either very tinted, therefore have a very low light transmission factor, often at most 3%, or diffuse, in order to mask this light. which is located below the plate. Tinted glass-ceramics generally contain crystals of 13-quartz structure, while diffusing glass-ceramics generally contain crystals of 13-spodumene (or keatite) structure, generated by a ceramization treatment at higher temperature and whose larger diameter causes a diffusion of light. Crystals of 13-quartz structure are solid solutions containing the elements Si, Al, Li, Mg and Zn. In applications such as fireplace inserts, glazing or oven doors, on the contrary, it is important that the user can fully visualize what is behind the hob. To do this, transparent, colorless and non-diffusing glass-ceramics have been developed. Such glass-ceramics can also be used in cooking devices, and are in this case generally associated with masking means, such as opaque organic or inorganic coatings. The term “transparent” is preferably understood to mean the fact that the light transmission factor, within the meaning of standard NF EN 410, is at least 70%.
    [0004] The term "colorless" is preferably understood to mean the fact that the colorimetric transmission coordinates (a *, b *) are at most 20 in absolute value, using the reference observer CIE-1931 and the reference illuminant. D65.
    [0005] The term “non-diffusing” is preferably understood to mean the fact that the haze within the meaning of standard ASTM D1003-00 is at most 3%, in particular 2% and even 1%. The blur is the ratio of diffuse light transmission to total light transmission, expressed in percent. It is preferably measured using a spectrophotometer (method B of the aforementioned standard).
    [0006] Traditionally, these glass-ceramics have been produced from precursor glasses refined with oxides of antimony or arsenic. Glass refining consists of ridding the molten glass of any gaseous inclusion, and it is common to use refining agents for this purpose, the purpose of which is to generate an intense gas evolution within the molten glass capable of. '' aggregate the small gaseous inclusions and bring them to the surface. In view of the toxicity of these refining agents, it has more recently been proposed to use tin oxide (SnO 2), which further enables glass to be formed by the float process, which consists of pouring the glass on a bath of molten tin. However, it appears that this oxide tends to give a yellowish color to the glass ceramic.
    [0007] To solve this problem, application EP 1837313 proposes to decolorize the glass ceramic by using neodymium oxide (Nd203). In addition to its high cost, this oxide is however capable of producing a pink coloration when its addition is poorly controlled, while reducing the light transmission of the glass ceramic. Application EP 2284131 proposes to reduce the content of nucleating agents Zr02 and especially Ti02, by using total contents of less than 3.8%. It appeared, however, that such low levels could lead to uncontrolled growth of crystals of 13-quartz structure, which could generate haze. The object of the invention is to provide a transparent, colorless and non-diffusing glass-ceramic, not using arsenic and antimony oxides, the composition of which is compatible with the glass lamination process, which can be used. produced at a reduced cost and exhibiting the lowest possible residual yellow coloration.
    [0008] To this end, the invention relates to a transparent, colorless and non-diffusing glass-ceramic plate of the lithium aluminosilicate type and containing crystals of 13-quartz structure, the chemical composition of which does not contain arsenic oxides, antimony and neodymium, 10 and includes the following constituents within the limits defined below expressed in percentages by weight: SiO2 55-75%, in particular 60-70%, A1203 12-25%, in particular 19-24%, Li2O 2-5%, in particular 3-4%, 15 Na20 + K2O 0- <2%, in particular 0-1%, Li2O + Na20 + K20 0- <7%, in particular 0-5%, CaO 0.3-5% , MgO 0-5%, in particular 0-1%, SrO 0-5%, in particular 0-1%, 20 BaO 0.5-10%, in particular 1-5%, CaO + BaO> 1%, in particular 3- 5%, ZnO 0-5%, in particular 1-2%, TiO2 1.9%, ZrO2 3%, in particular 2-3%, 25 Ti02 + Zr02> 3.80%, SnO2 (I), 1%, Sn02 / (Sn02 + Zr02 + Ti02) <0.1, especially <0.06.
    [0009] The light transmission factor of the plate according to the invention is preferably at least 75%, in particular 80%. This factor is typically calculated according to standard NF EN 410 from a transmission spectrum 5 measured using a spectrophotometer. Such values are particularly appreciable in the case of plates used as oven doors, fireplace inserts, fire-resistant glazing, in order to ensure the best possible visibility for users.
    [0010] The colorimetric coordinate b * of the plate according to the invention is preferably at most 20, in particular 15. A low (positive) value of b * indicates a more neutral, less yellow hue. The b * coordinate is preferably at least -2, or even 0. The a * coordinate is for its part preferably between -5 and +5, in particular between -2 and +1. These quantities are calculated in a known manner, from an experimental spectrum produced for wavelengths between 380 and 780 nm, taking into consideration the illuminant D65 as defined by standard ISO / CIE 10526 and 1 'CIE colorimetric reference observer 1931 as defined by ISO / CIE 10527. The various optical properties mentioned above are measured or calculated for the actual thickness of the plate.
    [0011] The glass-ceramic preferably has a coefficient of linear thermal expansion of at most 10.10-7 K-1 between 20 and 700 ° C, in order to guarantee excellent resistance to thermal shock. The coefficient of linear thermal expansion is measured in a known manner using a dilatometer, in particular according to standard ISO 7991: 1987.
    [0012] The crystals of 13-quartz structure advantageously have a size of at most 100 nm, in particular 80 nm, in order to avoid the scattering of light. This size corresponds to the average size which can be deduced from X-ray diffraction diagrams by the Rietveld method. The chemical composition of the glass ceramic hob includes the oxides previously indicated. Preferably, it consists essentially of these oxides.
    [0013] The expression "consists essentially of" is understood in the sense that the aforementioned oxides constitute at least 96%, even 98% and even 99% of the weight of the glass ceramic. All the contents indicated in the present text are contents by weight.
    [0014] Silica (SiO 2) is the main glass forming oxide. High contents will contribute to increasing the viscosity of the glass beyond what is acceptable, while contents which are too low will increase the coefficient of thermal expansion. The silica content is preferably within a range from 60 to 70%, in particular from 62 to 66%. Alumina (A1203) also helps increase the viscosity of glass and therefore make it more difficult to melt. When it is present in too low levels, the glass is however difficult to ceramize. The alumina content is preferably within a range ranging from 19 to 24%, in particular from 20 to 23%. Lithium oxide (Li20) is essential for the formation of 13-quartz crystals. A minimum content is also necessary in order to reduce the viscosity of the glass at high temperature. The Li20 content is preferably in a range from 3 to 4%, in particular from 3.5 to 4%. The sum of the soda (Na2O) and potash (K2O) contents, denoted Na20 + K20, is limited in order to ensure a low coefficient of thermal expansion. This sum is advantageously at most 1.5%, or even 1%. In order to ensure an adequate viscosity at high temperature, making it possible to optimize both the melting and the forming of the precursor glass, the composition of the plate 10 contains lime (CaO) and barium oxide (BaO) in the aforementioned contents. The sum of the CaO and BaO contents (denoted CaO + BaO) is preferably within a range ranging from 3 to 5%, in particular from 3 to 4%. The CaO content is preferably at least 0.8%, especially 1% and even 1.2%. Contents of at most 3% and even 2% are preferred, on the one hand to avoid excessive corrosion of the refractories of the furnace, on the other hand to limit the formation of potentially diffusing crystals. CaO makes it possible to reduce the coefficient of thermal expansion of the glass ceramic, in particular when it is substituted for BaO. The BaO content is preferably at least 1%, in particular 2%. It is advantageously at most 5%, or even 4% and even 3%.
    [0015] The MgO content is preferably at most 1% and even 0.6%. Contents ranging from 0.2 to 0.6% are preferred. The SrO content is preferably at most 1%. It is even advantageously zero. The ZnO content is advantageously within a range ranging from 1 to 2%. During ceramization, this oxide participates in the formation of crystals of quartz structure, and therefore contributes to lowering the coefficient of thermal expansion. The oxides of titanium (TiO2) and zirconium (ZrO2) serve as nucleating agents and promote bulk crystallization of crystals of 13-quartz structure. Their joint presence is compulsory, and their respective contents have been optimized by the inventors in order to ensure good optical properties for the glass-ceramic. The sum of their contents (TiO2 + ZrO2), which should be greater than 3.80%, is preferably greater than 4%. The inventors have in fact been able to observe that for values that are too low, the 13-quartz crystals could have sizes greater than 100 nm, or even 200 nm, causing undesirable light scattering. The TiO2 content is preferably at most 1.8%, in particular within a range ranging from 1.4 to 1.8%, or even from 1.5 to 1.8%. It is indeed important to limit the TiO2 content in order to minimize the yellow coloration of the glass ceramic. The zirconium oxide content is also limited so as not to lead to excessively high liquidus temperatures. Tin oxide (SnO 2) is a refining agent. Its content is preferably at least 0.15% in order to ensure excellent quality refining. However, it appeared to the inventors that this oxide also played a role during ceramization as well as for the appearance of the yellow coloration, thus influencing both the optical and thermomechanical properties of the glass ceramic. The inventors have been able to demonstrate that the SnO 2 / (SnO 2 + ZrO 2 + TiO 2) ratio should be less than 0.1, preferably 0.08, or even 0.07, 0.06 or even 0.05. Such a condition ensures both excellent transparency and a low coefficient of thermal expansion.
    [0016] Iron oxide (Fe 2 O 3) is a commonly widespread impurity, and therefore necessarily present in the plate according to the invention. Since this oxide contributes to yellowing the plate, its content is advantageously at most 300 ppm (0.03%), in particular 250 ppm, or even 150 ppm. As indicated above, the composition of the glass ceramic is free from oxides of arsenic and antimony. By this is meant that these oxides are at best only present in trace form, their total content not exceeding 1000 ppm, or even 500 ppm and even 200 ppm. Their total content is even advantageously zero. The composition of the glass ceramic is also free from neodymium oxide. More generally, it is advantageously free of rare earth oxides (lanthanides), which are expensive and reduce the light transmission of the glass ceramic. For the same reason, the composition of the glass ceramic preferably does not contain a coloring agent chosen from Cr203, CuO, Se, NiO, V205, or else sulphides. The composition may nevertheless comprise small amounts of cobalt oxide (Co0), at most 30 ppm and even 10 ppm, in order to further reduce the yellow coloration. The glass-ceramic plate preferably has a thickness within a range ranging from 1 to 8 mm, in particular from 2 to 6 mm, or even from 3.8 to 5.2 mm. Its lateral dimensions (after cutting to the dimensions of use) typically range from 30 cm to 200 cm, in particular from 50 cm to 150 cm.
    [0017] The subject of the invention is also a glass plate capable of being transformed into a glass-ceramic plate according to the invention by a ceramization treatment. The chemical composition of the glass plate is substantially identical to that of the glass ceramic plate. On the other hand, it is vitreous in nature, free from crystals.
    [0018] The subject of the invention is also a process for obtaining a glass-ceramic plate according to the invention, comprising a melting step, a forming step, then a ceramization step. The smelting is typically carried out in refractory furnaces using burners using air or, better still, oxygen, and natural gas or fuel oil as fuel. Molybdenum or platinum resistors immersed in the molten glass can also provide all or part of the energy used to obtain molten glass. Raw materials (silica, spodumene, petalite, lithium carbonate etc.) are introduced into the furnace and under the effect of high temperatures undergo various chemical reactions, such as decarbonation reactions, actual fusion ... The carrier lithium is preferably lithium carbonate, the impurity content of which is lower than those usually found in natural carriers such as spodumene or petalite. Natural carriers poor in impurities (eg comprising less than 200 ppm iron oxide) can however be used. The maximum temperature reached by the glass is typically at least 1500 ° C, in particular between 1600 and 1700 ° C. The forming of the glass in plates can be carried out in a known manner by rolling the glass between metal or ceramic rolls, by drawing (upwards or downwards) or else by floating, a technique consisting of pouring the molten glass onto a bath. molten tin.
    [0019] The ceramization step preferably involves a thermal cycle implementing a rise in temperature to a crystallization temperature preferably within a range ranging from 850 to 1000 ° C, in particular from 860 to 960 ° C. The choice of temperatures and / or ceramization times, to be adapted to each composition, makes it possible to adjust the thermal expansion coefficient of the material obtained by varying the size and the quantity of crystals. Preferably, the thermal cycle comprises a rise to a temperature between 650 ° C and 860 ° C for a period of 15 to 200 minutes (nucleation step) followed by a rise to a temperature between 860 and 960 ° C for a period of 15 to 200 minutes. duration of 5 to 120 minutes (crystal growth stage).
    [0020] The subject of the invention is also articles comprising at least one glass-ceramic plate according to the invention. Such articles are in particular: a cooking device 20 a domestic oven door in particular as a plate intended to be closest to the enclosure of said oven. a fireplace insert fire-resistant glazing.
    [0021] The cooking device is preferably of the radiant or induction type. It is preferable that the plate is able to conceal the heating means (for example the inductors), the electrical wiring, as well as the control and monitoring circuits of the cooking device. For this purpose, it is possible to provide part of the surface of the plate (that which in the cooking device is located opposite the elements to be concealed) 3025793 12 with a coating deposited on and / or under the plate, said coating having the capacity to absorb and / or reflect and / or diffuse light radiation. The coating can be deposited under the plate, that is to say on the surface facing the internal elements of the device, also called the "lower face", and / or on the plate, that is to say in upper face. The coating may be an organic-based layer, such as a paint, resin or lacquer layer, or a mineral-based layer, such as an enamel or a metallic layer or an oxide, nitride, oxynitride. , oxycarbide of a metal. Preferably, the organic layers will be deposited on the lower face, while the mineral layers, in particular the enamels, will be deposited on the upper face. The various internal elements of the cooking device may also be concealed by an opaque sheet placed between them and the plate, for example a sheet of mica. In addition to the glass plate and at least one inductor (preferably three or even four and even five), the cooking device 20 can comprise at least one light emitting device, at least one command and control device, the assembly. being included in a box. One or each device emitting light is advantageously chosen from light-emitting diodes (for example forming part of 7-segment displays), liquid crystal displays (LCD), light-emitting diodes, optionally organic (OLED), fluorescent displays (VFD). The colors seen through the plate are diverse: red, green, blue, and all possible combinations, including yellow, purple, white ... These devices emitting light can be purely decorative, for example separate visually different areas of the plate. In most cases, however, they will have a functional role by displaying various information useful to the user, in particular indication of the heating power, the temperature, the cooking programs, the cooking time, and areas of the plate exceeding. a predetermined temperature. Command and control devices generally include sensitive keys, for example of the capacitive or infrared type. All of the internal elements are generally fixed to a box, often metallic, which therefore constitutes the lower part of the cooking device, normally hidden in the worktop or in the body of the cooker. The domestic oven door according to the invention preferably comprises an internal plate and an external plate, these two plates forming the two external main flat faces of the door, so that once the door is mounted on the oven, the plate internal happens to be closest to the oven enclosure, and the external plate happens to be closest to the user. The oven door according to the invention preferably comprises at least one intermediate plate situated between the internal glass plate and the external plate, and separated from each of the latter by at least one air knife. A preferred door comprises three or four plates, and therefore one or two intermediate plate (s). The intermediate and outer plates are preferably made of glass, in particular soda-lime or borosilicate. At least one plate, in particular an intermediate plate, is advantageously coated with a low-emissive layer, in particular with a layer 30 of an electroconductive transparent oxide (TC0), such as for example doped tin oxide, in particular fluoride or antimony. The presence of such layers makes it possible to reduce the heat exchange between the plates, thus helping to improve the thermal insulation of the door. The examples of embodiments which follow illustrate the invention without limiting it.
    [0022] Glass-ceramic plates were prepared as follows: various glass samples exhibiting the chemical compositions reported in the tables below were obtained in a conventional manner by melting powdery raw materials. These samples in the form of a 5 mm thick plate were then subjected to a ceramization treatment. Tables 1 to 3 below summarize the results obtained, indicating for each example: - its chemical composition by weight - the temperature at which the glass has a viscosity of 10,000 Poises (1 Poise = 0.1 Pa. $), Noted T4 and expressed in ° C, - the ceramization temperature, noted Tc and 20 expressed in ° C, - the ceramization time, noted tc and expressed in minutes, - the linear thermal expansion coefficient of the glass ceramic between 30 and 700 ° C, noted a and 25 expressed in 10-7 / K, - the appearance of the glass ceramic, T for transparent and D for diffusing, - the light transmission factor within the meaning of standard NF EN 410, noted TL and expressed in %, 30 - the transmission colorimetric coordinate b *) calculated from an experimental spectrum, using the CIE-1931 reference observer and the D65 reference illuminant. Examples C1 and C2 are comparative examples.
    [0023] Their contents of titanium and zirconium oxides being too low, the glass-ceramics obtained exhibit an unacceptable fuzziness. Examples 1 to 11 are examples according to the invention.
    [0024] 3025793 16 Cl C2 1 2 3 SiO2 64.9 64.2 63.2 63.1 63.6 A1203 21.6 21.3 22.0 21.4 21.7 Li2O 3.70 3.60 3.90 3 , 70 3.70 Na2O 0.68 0.68 0.77 0.80 0.71 K2O 0.25 0.24 0.28 0.25 0.26 MgO 0.29 0.27 0.40 0.37 0.47 CaO 1.31 0.38 1.00 0.49 1.11 BaO 2.04 3.99 2.05 4.27 2.51 ZnO 1.50 1.55 1.60 1.47 1, 47 TiO2 1.41 1.44 1.81 1.53 1.71 ZrO2 2.00 2.02 2.60 2.29 2.52 TiO2 + ZrO2 3.41 3.46 4.41 3.82 4, 23 SnO2 0.31 0.34 0.23 0.33 0.19 Sn02 / (Ti02 + Zr02 + Sn02) 0.083 0.089 0.049 0.079 0.043 T4 (° C) 1301 1307 Tc (° C) 890 890 890 890 880 tc (min ) 35 35 35 35 15 cx (10-7 / K) 5.8 5.1 Appearance DDTTT TL (%) 78.0 77.7 75.5 b * 12.1 13.6 11.9 Table 1 3025793 17 4 5 6 7 8 SiO2 63.6 64.1 64.4 63.7 64.2 A1203 21.5 21.1 21.0 21.7 22.0 Li2O 3.69 3.70 3.69 3.80 3.66 Na2O 0.84 0.87 0.83 0.65 0.69 K2O 0.26 0.26 0.27 0.27 0.26 MgO 0.47 0.48 0.48 0.48 0, 30 CaO 1.25 1.35 1.33 1.26 1.34 BaO 2.20 2.02 2.01 2.02 2.06 ZnO 1.50 1.50 1.48 1.49 1.41 TiO2 1.72 1.72 1.72 1.75 1.75 ZrO2 2.55 2.52 2.40 2.36 2.10 TiO2 + ZrO2 4.27 4.27 4.12 4.11 3.85 SnO2 0.26 0.36 0.41 0.18 0.26 Sn02 / (Ti02 + Zr02 + Sn02) 0.057 0.078 0.088 0.042 0.063 T4 (° C) 1280 1280 1280 1288 Tc (° C) 890 870 890 890 890 tc (min) 35 35 35 35 35 cx (10-7 / K) 6.7 7.3 5.0 3.1 Aspect TTTTT TL (%) 81.5 74.2 81.6 77.3 b * 8.4 14.7 8.4 10.4 Table 2 3025793 18 9 10 11 SiO2 64.0 63.6 64.3 A1203 21.9 21.9 21.6 Li2O 3.53 3.51 3.50 Na2O 0.74 0.72 0.61 K2O 0.27 0.28 0.27 MgO 0.30 0.40 0.29 CaO 1.35 1.29 1.27 BaO 2.14 2.04 2.02 ZnO 1.49 1.63 1.41 TiO2 1.75 1.82 1.74 ZrO2 2.20 2.60 2.36 Ti02 + Zr02 3.95 4.42 4.10 SnO2 0.30 0.23 0, 27 Sn02 / (Ti02 + Zr02 + Sn02) 0.071 0.078 0.062 T4 (° C) 1300 Tc (° C) 890 890 890 tc (min) 35 35 35 cx (10 7 / K) 4.4 3.1 Appearance TTT TL ( %) 82.5 78.0 85.5 b * 7.8 12.1 6.4 Table 3
    权利要求:
    Claims (14)
    [0001]
    CLAIMS 1. Colorless and non-diffusing transparent glass-ceramic plate of the lithium aluminosilicate type and containing crystals of 13-quartz structure, the chemical composition of which does not contain oxides of arsenic, antimony and neodymium, and includes the constituents following within the limits defined below expressed in 10 weight percentages: Si02 55-75%, in particular 60-70%, A1203 12-25%, in particular 19-24%, Li20
    [0002]
    2-5%, especially
    [0003]
    3-4%, Na20 + K20 0- <2%, in particular 0-1%, 15 Li20 + Na20 + K20 0- <7%, in particular 0-5%, Ca0 0.3-5%, Mg0 0-5% , in particular 0-1%, Sr0 0-5%, in particular 0-1%, Ba0 0.5-10%, in particular 1-5%, 20 Ca0 + Ba0> 1%, in particular 3-5%, ZnO 0- 5%, especially 1-2%, TiO2 1.9%, Zr02 3%, especially 2-3%, Ti02 + Zr02> 3.80%, 25 Sn02 0.1%, Sn02 / (Sn02 + Zr02 + Ti02) <0.1, in particular <0.06. 2. Glass-ceramic plate according to the preceding claim, in which the light transmission factor is at least 75%, in particular 80%, and in which the colorimetric coordinate b * is d 'at most 20, in particular 15. 3. Glass-ceramic plate according to one of the preceding claims, such that the glass-ceramic 5 has a coefficient of linear thermal expansion of at most 10.10-7 K-1 between 20 and 700 ° C.
    [0004]
    4. Glass-ceramic plate according to one of the preceding claims, such that the crystals of 13-quartz structure have a size of at most 100 nm. 10
    [0005]
    5. Glass-ceramic plate according to one of the preceding claims, such that the sum of the contents of TiO2 and ZrO2 is greater than 4%.
    [0006]
    6. Glass-ceramic plate according to one of the preceding claims, such that the TiO2 content is at most 1.8%.
    [0007]
    7. Glass-ceramic plate according to one of the preceding claims, such that the SnO2 content is at least 0.15%.
    [0008]
    8. Glass-ceramic plate according to one of the preceding claims, such that the CaO content is at least 0.8%.
    [0009]
    9. Glass plate capable of being transformed into a glass-ceramic plate according to one of the preceding claims by a ceramization treatment. 25
    [0010]
    10. Cooking device comprising at least one plate according to one of claims 1 to 8.
    [0011]
    11. Door of a domestic oven comprising at least one plate according to one of claims 1 to 8, in particular as a plate intended to be closest to the enclosure of said oven. 3025 793 21
    [0012]
    12. Fireplace insert comprising at least one plate according to one of claims 1 to 8.
    [0013]
    13. Fire-resistant glazing comprising at least one plate according to one of claims 1 to 8.
    [0014]
    14. A method of obtaining a glass-ceramic plate according to one of claims 1 to 8, comprising a melting step, a forming step, then a ceramization step.
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3025793A1|2016-03-18|VITROCERAMIC PLATE
    EP2914555B1|2018-08-15|Glass plate for induction cooking device
    FR2946042B1|2019-11-15|VITRO CERAMIC PLATE
    KR20160076995A|2016-07-01|Glass ceramic substrate made of a transparent, colored las glass ceramic and method for producing it
    FR3002532A1|2014-08-29|LITHIUM ALUMINOSILICATE TYPE VITROCERAMIC COMPRISING A SOLID BETA-SPODUMENE SOLUTION
    FR2990690A1|2013-11-22|QUARTZ-BETA VITROCERAMICS, TRANSPARENT, ESSENTIALLY COLORLESS AND NON-DIFFUSING; ARTICLES THEREOF VITROCERAMIC; PRECURSOR GLASSES
    JP6612224B2|2019-11-27|Alkali-free aluminosilicate glass suitable as base material for induction heating cooking top plate
    FR2955574A1|2011-07-29|BETA-QUARTZ VITROCERAMICS; ARTICLES THEREOF VITROCERAMIC; METHODS OF OBTAINING; PRECURSORING GLASSES.
    FR2909374A1|2008-06-06|CLEAR, COLORLESS, COLORLESS BETA-QUARTZ GLAZE WITH LOW TIO2 CONTENT; ARTICLES THEREOF VITROCERAMIC; PRECURSOR GLASSES, METHODS OF PREPARATION
    EP2076470A2|2009-07-08|Method for refining a lithium alumino-silicate glass and glass ceramic thus obtained
    US20210317033A1|2021-10-14|Glass ceramic with reduced lithium content
    EP3137427B1|2021-03-10|Partially crystallised glass plate
    FR3015470A1|2015-06-26|INDUCTION COOKTOP AND METHOD OF OBTAINING
    FR3051185A1|2017-11-17|CRYSTALLIZABLE LITHIUM ALUMINOSILICATE GLASS AND VITROCERAMIC MADE FROM THIS GLASS, PROCESS FOR MANUFACTURING GLASS AND VITROCERAMIC AND USE OF VITROCERAMIC
    JP6301965B2|2018-03-28|Enamels suitable for glass-ceramic articles and their coatings
    FR2796063A1|2001-01-12|NOVEL RECYCLABLE BLACK EMAIL COMPOSITION COMPRISING ZINC, MANUFACTURING METHOD, AND ENAMEL PRODUCTS OBTAINED
    FR3036700A1|2016-12-02|LITHIUM ALUMINOSILICATE-LIKE, TRANSPARENT, ESSENTIALLY COLORLESS, TIN-CONTAINED VITROCERAMICS WITH IMPROVED MICROSTRUCTURE AND IMPROVED THERMAL EXPANSION PROPERTIES
    FR3109937A1|2021-11-12|Transparent quartz-β glass-ceramics with specific transmission
    FR3088321A1|2020-05-15|TRANSPARENT VITROCERAMICS OF LITHIUM LOWIUM QUARTZ-BETA
    同族专利:
    公开号 | 公开日
    KR20170054454A|2017-05-17|
    US20170260086A1|2017-09-14|
    JP6703526B2|2020-06-03|
    US10017415B2|2018-07-10|
    WO2016038319A1|2016-03-17|
    JP2017528410A|2017-09-28|
    EP3191420A1|2017-07-19|
    FR3025793B1|2016-12-02|
    CN106795039A|2017-05-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH11100229A|1997-09-25|1999-04-13|Nippon Electric Glass Co Ltd|Infrared ray transmitting glass ceramics|
    EP1146018A1|2000-04-08|2001-10-17|Schott Glas|Floated flat glass|
    EP2284131A1|2008-05-19|2011-02-16|Nippon Electric Glass Co., Ltd.|Crystallizable glass and crystallized glass obtained by crystallizing the same|WO2018211216A1|2017-05-18|2018-11-22|Eurokera S.N.C.|Method for manufacturing a lithium aluminosilicate glass product for glass-ceramic products|
    WO2019016338A1|2017-07-21|2019-01-24|Eurokera|Beta-spodumene glass-ceramics that are white, opalescent, or opaque, with low titanium content, and tin-fined|JPH11100231A|1997-09-25|1999-04-13|Nippon Electric Glass Co Ltd|Infrared transmissive glass ceramics|
    JPH11100230A|1997-09-25|1999-04-13|Nippon Electric Glass Co Ltd|Infrared ray transmitting glass ceramics|
    US7507681B2|2007-02-28|2009-03-24|Eurokera|Glass-ceramic, articles and fabrication process|
    FR2955400B1|2010-01-21|2012-03-23|Eurokera|DISPLAY ASSEMBLY COMPRISING A VITROCERAMIC PLATE|
    FR2975391A1|2011-05-16|2012-11-23|Eurokera|QUARTZ-BETA VITROCERAMICS WITH CONTROLLED TRANSMISSION CURVE; ARTICLES IN VITROCERAMIC LENSES, PRECURSORIC GLASSES.|FR3036700B1|2015-05-29|2021-04-16|Eurokera|LITHIUM ALUMINOSILICATE VITROCERAMICS, TRANSPARENT, ESSENTIALLY COLORLESS, TIN-REFINED, WITH IMPROVED MICROSTRUCTURE AND IMPROVED THERMAL EXPANSION PROPERTIES|
    FR3040766B1|2015-09-08|2018-07-27|Eurokera S.N.C.|WORK PLAN IN VITROCERAMIC|
    DE102016208300B3|2016-05-13|2017-08-03|Schott Ag|Crystallizable lithium aluminum silicate glass and transparent glass ceramic produced therefrom, and also methods for producing the glass and the glass ceramic and use of the glass ceramic|
    FR3052770B1|2016-06-17|2018-07-13|Eurokera S.N.C.|GLASS-CERAMIC GLASS-LIKE ARTICLE AND PROCESS FOR OBTAINING THE SAME|
    EP3950622A1|2019-04-01|2022-02-09|Nippon Electric Glass Co., Ltd.|Li2o-al2o3-sio2-based crystallized glass|
    DE102020202602A1|2020-02-28|2021-09-02|Schott Ag|Crystallizable lithium aluminum silicate glass and glass ceramics made therefrom as well as processes for the production of the glass and the glass ceramics and the use of the glass ceramics|
    法律状态:
    2015-09-09| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-18| PLSC| Search report ready|Effective date: 20160318 |
    2016-09-22| PLFP| Fee payment|Year of fee payment: 3 |
    2017-09-19| PLFP| Fee payment|Year of fee payment: 4 |
    2018-09-18| PLFP| Fee payment|Year of fee payment: 5 |
    2019-09-25| PLFP| Fee payment|Year of fee payment: 6 |
    2020-09-30| PLFP| Fee payment|Year of fee payment: 7 |
    2021-09-30| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1458568A|FR3025793B1|2014-09-12|2014-09-12|VITRO CERAMIC PLATE|FR1458568A| FR3025793B1|2014-09-12|2014-09-12|VITRO CERAMIC PLATE|
    JP2017513656A| JP6703526B2|2014-09-12|2015-09-11|Glass ceramic plate|
    EP15770577.3A| EP3191420A1|2014-09-12|2015-09-11|Vitroceramic plate|
    PCT/FR2015/052437| WO2016038319A1|2014-09-12|2015-09-11|Vitroceramic plate|
    KR1020177009469A| KR20170054454A|2014-09-12|2015-09-11|Vitroceramic plate|
    US15/510,529| US10017415B2|2014-09-12|2015-09-11|Vitroceramic plate|
    CN201580048723.1A| CN106795039A|2014-09-12|2015-09-11|Glass ceramic board|
    [返回顶部]