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Guiding mold structure used for growth shaping single crystal alumina porcelain

A single crystal alumina, guided mode technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of unstable temperature field, high cost, difficult mass production, etc. The effect of stability, small internal stress in the crystal, and high crystallization yield

Inactive Publication Date: 2008-02-27
俞鹤庆 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the temperature difference between the periphery of the cylindrical crucible and the center of the crucible is large and the temperature field is unstable. When single crystal alumina ceramics are crystallized, it is easy to form a large grain non-single crystal structure or a mosaic structure. The internal stress of the crystal is large, the pass rate is low, and the cost is low. High, and the temperature inside the circular crucible is not uniform, so the crystallizers can only be arranged along the circumference equidistant from the center of the circle as far as possible, so the number of crystallizers that can be arranged is limited, and it is difficult to enter industrialized mass production

Method used

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  • Guiding mold structure used for growth shaping single crystal alumina porcelain
  • Guiding mold structure used for growth shaping single crystal alumina porcelain
  • Guiding mold structure used for growth shaping single crystal alumina porcelain

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Embodiment Construction

[0012] See Fig. 1, Fig. 2, the present invention comprises crucible 8, and crucible 8 is installed in heater 13 by handle 18, and heater 13 is installed in electrode plate 12, and heater 13 is provided with insulation screen 17, and insulation screen 17 is made of graphite The graphite plate of the inner layer of the thermal insulation screen 17 is a graphite plate coated with tungsten; the inner wall of the thermal insulation screen 17 can also be a molybdenum plate, and the outside of the molybdenum plate is covered with a graphite plate. The thermal insulation screens of these two structures are both The stability and uniformity of the thermal field can be guaranteed. The crystallizers provided in the crucible 8 can be provided with corresponding crystallizers according to different products. The crystallizers used to grow single crystal alumina ceramic tubes are shown in Fig. 2, and the number can be determined according to The size of the crucible is set (there are 5 in Fi...

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Abstract

The present invention relates to a crucible mould-guiding structure for growing and forming monocrystal alumina porcelain. It is characterized by that it includes a crucible, said crucible is mounted in a heater interior, the described heater is mounted on an electrode plate, the exterior of the described heater is equipped with a heat-insulating screen, in the described crucible interior a crystallizer is set, over the crystallizing table of said crystallizer an inoculating crystal is set, and said inoculating crystal is connected with inoculating crystal shaft by means of connecting structure.

Description

(1) Technical field [0001] The invention relates to the technical field of growing and shaping single crystal alumina ceramics, in particular to a guide mold structure for growing and shaping single crystal alumina ceramics. (2) Background technology [0002] The production of shaped single crystal alumina porcelain at home and abroad usually adopts high-frequency induction heating or graphite resistance heating, and the crucible is usually cylindrical. However, the temperature difference between the periphery of the cylindrical crucible and the center of the crucible is large and the temperature field is unstable. When single crystal alumina ceramics are crystallized, it is easy to form a large grain non-single crystal structure or a mosaic structure. The internal stress of the crystal is large, the pass rate is low, and the cost is low. High, and the temperature inside the circular crucible is not uniform, so the crystallizer can only be arranged along the circumference eq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B15/24C30B15/34C30B29/20C30B29/66
Inventor 俞鹤庆俞瑾
Owner 俞鹤庆
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