• 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:
    Platinum corrosion reducing amounts of a premelted oxide mixture that is PbO and B2O3, or PbO and SiO2, or PbO, SiO2 and B2O3 are added to raw batch ingredients for a lead-containing solder glass. All or part of the Pb3O4 or PbO normally used in the raw batch is replaced for advantages including reducing the amount of platinum corrosion in a platinum melter used to melt the raw batch to provide the glass.
    公开号:SU1565344A3
    申请号:SU4028130
    申请日:1986-09-15
    公开日:1990-05-15
    发明作者:Алфонс Вивер Эдвард
    申请人:Оуэнс Иллинойс. Инк (Фирма)；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION The invention relates to the glass industry, in particular to the preparation of a solder boron-lead glass.
    Pb304, which is formed as a result of boiling lead glass, adversely affects health, and also eats away platinum crucibles, in which lead glasses are cooked.
    The purpose of the invention is to reduce platinum corrosion.
    The drawing shows a state diagram of a pbdO-Bfc03-SiOe pseudotriple system.
    The method is carried out as follows.
    In order to obtain a boron-lead solder glass, a mixture of PbO, BhgOe and / or SiOa is preliminarily fused, and the composition of the mixture is on the ternary diagram above the ABCD line. The mixture is then prepared and cooked in a platinum crucible.
    If necessary, the glass may contain one or more ZnO, LaO, .0e and .0z oxides, and the method contains the steps of preparing charge ingredients for obtaining the specified sealing glass compositions and pre-mixing the charge ingredients in an amount that effectively removes corrosion of platinum, mixtures of previously melted POH oxides and BfcO or pre-melted mixture of PbO and SiO, or mixtures thereof. The composition of the pre-molten oxides is located above the ABCD line of the ternary system state diagram.
    Because of the very high corrosiveness of boric acid lead and boron acid lead-zinc glasses, refractories must be melted in refractory melting devices with a cooled bottom and walls or
    SP
    ® ate
    with
    Ј

    s
    in platinum or platinum-rhodium melting inserts, 4 or crucibles.
    Pre-melting of ingredients significantly reduces the degree of. aggressiveness towards platinum (during smelting) if a platinum group of metals is used for smelting. This is determined by the platinum content in the glass melt. When using pre-melted ingredients using JQ, the platinum content is about k or 5 to 15 ppm, compared to 20-35 ppm when using the usual mixture of oxides and jlov.
    According to the invention, preferably a borated lead glass obtained in a platinum melter is improved. At the same time glass
    wt.%
    20
    25
    Contains the following ingredients, PCO 65-85
    B2035-15
    SiOe0-12
    ZnO0-15
    BaO Q-Ts
    A1Q030-2
    Bie030-k
    The improvement includes the supply of all or part of the PbO and SiOi content in a pre-molten mixture of oxides, including a mixture of PbO and DU03 and, if necessary, a mixture of PbO and SiO / i, or a mixture of PbO, BrOe and SiOg. In this case, the remaining oxides are oxides of blended materials or carbonates, and the previously melted mixture of oxides is used in an amount that reduces the corrosion of platinum.
    The pre-melted oxide (PbO and BaOe, or SiO / g, or a mixture of PbO, base and SiOa) has a composition that is located above the ABCD line in the state diagram of the pseudo-triple system.
    35
    40
    Point A has a composition of preliminarily molten oxides from about 85.75 masD of PbO, 3.75 wt.% B and 10.5 mas. SiOs, and point 0 with taws from about 90.65 wt.% Po, 3.75 wt.% and 5.6 wt.% SiO As shown in the diagram, the main line does not show, and the BC line shows about 2.5 mas. The top of the triangle of the diagram shows the aesthetics of a lead boric acid of a composition of approximately 87.5 PbO and 12.5 masD of B20-s without Si02.
    Pre-molten villages have an average particle size of 100 mesh or, as a rule, 4-30 m. Particles of previously melted oxides are much larger than a part of red lead or Pb, 04 of the usual charge. This particle typically has a size of about 200-325 mesh.
    Other charge materials for BgO-s, SiO, etc. can be used, for example, boric acid, b-anhydride, siliceous sand, zinc oxide, alumina, hung oxide and barium carbonate.
    The more particles of the molten oxide precursor are added to the particles of the ordinary charge, the greater is the corrosion of platinum from the furnace plate. Platinum corrosion can be reduced from a normal level of about 20-35 ppm with PbgOf used to about 4 or ppm by replacing the bases of the part of Pb, 04.
    Lead glasses are made of batch materials, including molten oxides that are molten hot. This mixing, melting and grinding is carried out by known soba.
    The entire amount of PbO, 04 is replaced
    As shown in the drawing, the left corner of the cue is pre-melted

    0
    five
    five
    0
    Point A has a composition of pre-molten oxides of about 85.75 maso of PbO, 3.75 wt.% And 10.5 maso of SiOs, and point 0 is a composition of about 90.65 wt.% Of Pyo, 3.75 mas.% And 5.6 wt.% SiO. As shown in the diagram, the main line does not show, and the BC line shows about 2.5 mas. The top of the triangle of the diagram shows the aesthetics of lead boric acid with a composition of approximately 87.5 wt.% PbO and 12.5 mas. B20-s without Si02.
    The pre-molten oxide has an average particle size of more than 100 mesh or, as a rule, 4-30 mesh. The particles of the pre-melted oxides are much larger than the particles of red lead or Pb, 04 of the usual charge. This particle typically has an average size of about 200-325 mesh.
    Other charge materials for BgO-s, SiO can be used. etc., for example boric acid, boric anhydride, siliceous sand, zinc oxide, alumina, bismuth oxide and barium carbonate.
    The more pre-molten oxide particles are added to the ordinary charge particles, the more the platinum corrosion from platinum furnace decreases. Platinum corrosion can be reduced from a normal level of about 20-35 ppm with PbgOf alone to about 4 or ppm by replacing the main part of Pb, 04.
    Lead glasses are made of charge materials including pre-melted oxides. Here, the mixing, melting and grinding are carried out by known methods.
    The entire amount of Pb0, 04 is replaced by
    the triangle forming a triple state diagram is a composition of about 85% by weight of PbO and 15% by weight of SiOQ. The right corner is a composition of about 92% by weight PHO and 8% by weight SiO / g. The vertex is a mixture of about 87.5 wt% PbO and 12.5 wtl. Good results were obtained with the composition of pre-molten oxides of about 86.25 wt.% PbO, 6.25 wt.% BijOa and maso SiOa, (see at point H).
    oxides as follows.
    The table shows the charge of sealing glass without Pbj04 content. Mixes Pby - or mixtures
    PHO-310 is a mixture of pre-molten oxides with an average particle size of about -30 mesh.
    As indicated in the examples, almost all
    the amount of Pb304 is removed from the charge and excellent results are obtained. Benefits are obtained by replacing 25, 50, or 75% Pb2Ots. The more replacing
    Pb30
    by
    down
    4 The better the results of platinum corrosion.
    The charge materials are mixed and melted using known methods.
    Pre-molten mixtures of PbO and or PbO and SiOe are prepared, for example, by heating mixtures of lead glue and silica or lead glue and boric acid in a conventional refractory melting unit with a heated surface and cooled walls. Then the molten mixture is subjected to fritting with water and dried to obtain pre-melted sms, used as the main component of the mixture.
    This stage of preparation of pre-molten oxides PbO and BeOe or PbO and SiOa is much easier compared to obtaining a melt of the finished product of lead boric acid, zinc crystallizing sealing glass or other lead composition, which may contain ZnO, BaO, AlgOa if necessary. and V120z.
    At the stage of obtaining mixtures of pre-molten oxides of PbO and Vg.0z or PbO and SiO, much cheaper raw materials can be used, for example, lead glt or boric acid. This stage can be carried out in conventional non-platinum (refractory) furnaces due to the low-temperature, eutectic nature of these mixtures and the non-crystallizing stability inherent to them.
    Received the following glass compositions using mixtures of pre-molten oxides and conventional charge materials, wt.%:
    PIL 75.2





    6
    12.10 8.35 2.13 2.00
    ten
    15
    20

    25
    thirty
    0
    five
    After melting the glass, carried out in a new platinum melting device, a control experiment is carried out with ordinary non-melted charge materials. Samples are taken every hour, crushed in the laboratory and tested for properties and platinum content.
    The following platinum content was found:
    Platinum ppm
    Normal charge
    No. 129
    Normal charge
    No. 223
    Pre
    melted
    charge number 1.0
    Pre
    melted
    charge number 25.8
    The results show that the pre-molten charge has a significantly lower platinum content.
    The glass obtained by the proposed method has excellent sealing glass properties.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    The method of producing lead-lead solder glass by pre-fusing some of the components, preparing the charge and boiling the latter in a platinum crucible, characterized in that, in order to reduce the corrosion of platinum, a mixture of PbO and / or SiO.2 is pre-alloyed, and its composition is above the ABCD line in the ternary diagram.
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    同族专利:
    公开号 | 公开日
    UA5712A1|1994-12-28|
    US4696909A|1987-09-29|
    DE3623684C2|1988-10-06|
    JPS62235228A|1987-10-15|
    DE3623684A1|1987-10-15|
    RO96169A|1989-01-30|
    KR870009959A|1987-11-30|
    CN1015442B|1992-02-12|
    JPH0424295B2|1992-04-24|
    RO96169B|1989-02-01|
    DD273828A5|1989-11-29|
    KR920001302B1|1992-02-10|
    IN167875B|1991-01-05|
    CN86106700A|1987-10-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US108598A|1870-10-25|Improvement in car-couplings |
    BE386219A|1931-05-20|
    BE481433A|1947-03-26|
    NL6807090A|1968-05-18|1969-11-20|
    US3942993A|1968-05-18|1976-03-09|U.S. Philips Corporation|Method of sealing adjoining parts of an evacuated vessel with solder glass|
    US3947279A|1971-12-23|1976-03-30|Owens-Illinois, Inc.|Thermally crystallizable glasses possessing precision controlled crystallization and flow properties and process of producing same|
    US3973975A|1972-04-21|1976-08-10|Owens-Illinois, Inc.|PbO-containing sealing glass with higher oxide of a cation to avoid PbO reduction|
    DE2223393A1|1972-05-13|1973-11-29|Carl Felk Kg|Lead silicate contg products - as substitute for red lead or litharge|
    FR2329602A1|1975-10-31|1977-05-27|Jenaer Glaswerk Schott & Gen|Passivating glass for semiconductors - contg. cordierite or lead titanate to reduce thermal expansion|
    US4522925A|1983-09-01|1985-06-11|Owens-Illinois, Inc.|Sealing glass and method of making a Willemite filler therefor|
    JPH0127982B2|1984-03-19|1989-05-31|Nippon Electric Glass Co|US5346863A|1992-12-11|1994-09-13|Nippon Electric Glass Co., Ltd.|Low temperature sealing composition|
    GB9410200D0|1994-05-21|1994-07-13|Hawke Cable Glands Ltd|Glands for terminating cables and pipes|
    KR20030012987A|2001-08-06|2003-02-14|김명식|Composition of lead crystal glass|
    DE10206665A1|2002-02-01|2003-09-04|Schott Glas|Process for melting inorganic, non-metallic material from specified raw material mixture comprises separately pre-melting and transferring into glassy/amorphous state one raw material having different composition to that of the end material|
    US20050022560A1|2003-07-03|2005-02-03|Engelhard Corporation|Tank for melting solder glass|
    CN1907896B|2005-08-02|2010-05-05|王世忠|Glass solder for producing building vacuum glass plate|
    法律状态:
    2010-09-20| REG| Reference to a code of a succession state|Ref country code: RU Ref legal event code: MM4A Effective date: 20000916 |
    优先权:
    申请号 | 申请日 | 专利标题
    US06/848,551|US4696909A|1986-04-07|1986-04-07|Platinum corrosion reducing premelted oxide compositions for lead containing solder glasses|
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