• 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 invention relates to a cold crucible for melting and crystallizing inorganic compounds. And it allows to ensure the growth of perfect crystals. The crucible is made in the form of metal tubes cooled from the inside, forming its walls, around which there is an induction coil. Under the bottom of the crucible there is an additional independent induction coil. Stress free crystals are obtained. 1 il. WITH
    公开号:SU1384209A3
    申请号:SU843741045
    申请日:1984-05-03
    公开日:1988-03-23
    发明作者:Дитер Матейка Вернер；Лауриен Рольф；Лиер Манфред
    申请人:Н.В.Филипс Глоэлампенфабрикен (Фирма)；
    IPC主号:
    专利说明:

    from 00
    4ib tC
    About WITH

    cm
    This invention relates to a cold crucible for melting and crystallization of inorganic compounds using the skull method.
    The purpose of the invention is to ensure the growth of perfect crystals.
    The drawing shows the crucible section.
    The walls of the crucible are made of metal, for example copper, tubes 1, bent at a right angle and arranged in a circle. The tubes 1 are spaced from each other at a distance of 0.3 mm, their external diameter is 10 mm. The tubes are sealed in the bottom of the crucible, and their upper ends are sealed in distribution ring 2. The inner cutter 3 enters the outer tube 1 in the area of knee 4 and is connected to the distribution ring 2 through the knee. Tubes I and 3 are connected with the help of paired couplings 5 and 6, which make it possible to quickly and simply replace tubes 1 and 3 in the event that they are out of order. The distribution ring 2-with tubes 1 and 3 is connected to several inlet and outlet nozzles 7 and 8 for the cooling medium. It is advisable to protect the tubes 1 from corrosion to apply a protective coating on them. In the case of copper tubes, a rhodium coating of 6 microns thick has been well recommended.
     The bottom 9 of the crucible consists of a support element 10 made of a dielectric material, a plate 11 of a dielectric material, such as quartz, inert with respect to the melt, and a holder ring 12, also made of a dielectric material, such as aluminum oxide. The main element 10 may be made of heat-resistant synthetic resin. There are recesses in which a plate 11 and a ring holder 12 are placed, which are rigidly connected to the main element 10, for example, using nylon bolts 13. A threaded connection allows the plate 11 to be pressed against the ring 14 serving as a seal for the cooling medium . To reduce local mechanical stresses that may occur between the ring-holder 12 and the plate 11, an elastic ring, for example, Of tetrafluoroethylene, is placed between them. Fittings 15 and 16 play the role of the corresponding 9
    five
    0
    five
    0
    five
    0
    five
    0
    five
    VENO But the inlet and outlet for the cooling environment.
    The bottom 9 of the crucible is associated with supports 17, made in the form of spring pins. Purpose 18 is to compensate for hermetic stresses when the melt expands in the crucible during its heating, thereby preventing the destruction of plate 11. By means of a mechanism (not shown), the distribution ring 2 together with tubes 1 and 3 can be moved in the vertical direction, due to which can be raised upwards from the bottom of the 9 crucible or lowered down towards it.
    The cold crucible described has an internal diameter of 121 mm. The height of the working volume of the crucible is 120 mm. The induction coil 19 is located near the walls of the crucibles and is powered by a generator with a frequency of the electromagnetic field of 1-7 MHz.
    A second induction coil 20, operating from a generator that generates an electromagnetic field of the same or a different frequency, is located under the bottom of 9 crucibles. A generator that powers an induction coil 20, for example, generates an electromagnetic field with a frequency of 7-10 KHz. Both generators can operate independently of each other.
    During operation of the crucible, the distributor ring 2 with tubes 1 and 3 is fixed by means of a threaded connection on the inlet and outlet nozzles for the cooling medium and is moved by special means in the direction set on the spring trunnions to the bottom 9 of the crucibles. The ring holder 12 encloses the tubes, increasing the resistance of the tubes 1 of the crucible to bending forces. At the end of the melting and crystallization, the wall of the crucible formed by the tubes 1 is lifted upwards, separating it from the bottom. The contents of the crucible at the same time can easily be discharged down through the resulting opening. Stress free crystals are obtained.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    Cold crucible for melting and crystallization of inorganic compounds, made in the form of metal
    internally cooled tubes forming the walls of the crucible, around which the induction coil is located, and having a cooled bottom made of dielectric material, characterized in that, in order to ensure the growth of perfect crystals, the crucible is provided with an additional independent induction coil located under its bottom.
    5 b t
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    同族专利:
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    US4687646A|1987-08-18|
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    引用文献:
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    JPS604599B2|1976-03-17|1985-02-05|Tokyo Shibaura Electric Co|
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    US4160796A|1977-10-31|1979-07-10|Howmet Turbine Components Corporation|Melting furnace constructions|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3316546A|DE3316546C1|1983-05-06|1983-05-06|Cold crucible for melting and crystallizing non-metallic inorganic compounds|
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