Fire-resistant case for annealing sapphire and production method thereof

A manufacturing method and a sapphire technology are applied to the refractory box for sapphire annealing and its manufacturing field, and can solve the problems of high price, high quality requirements of operators, complicated operation and the like

Active Publication Date: 2013-08-28
湖南华联特种陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The special annealing furnace for sapphire and the refractory support box are basically monopolized by developed countries such as the United States and Japan. They are expensive, and the operation is compl

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The refractory box for sapphire annealing is formed by pressing and sintering the main ingredients after adding colloid; the components and parts by weight of the main ingredients are: mullite premix A, 25 parts; the particle diameter is 80 mesh white Corundum sand, 50 parts; particle size is 100 mesh white corundum sand, 25 parts. The composition of the colloid is: dry dextrin, water, 50% polyethylene glycol and glycerin; 3 parts of dry dextrin, 1 part of water, 2 parts of 50% polyethylene glycol and 1 part of glycerin are added to every 100 parts of main ingredients , are calculated by weight.

[0057] The formula of the mullite premix A is: 98.5%-99.8%Al 2 o 3 With 98.5%-99.8%SiO 2 , by weight, mixed at a ratio of 76 parts alumina and 24 parts silica.

[0058] The refractory box for sapphire annealing is a box-type or box-type combined box; the box-type or box-type combined box includes a enclosure, a bottom plate located at the lower end of the enclosure, a cove...

Embodiment 2

[0072] The refractory box for sapphire annealing and its preparation method, the components and parts by weight of the main ingredients in Example 1 are changed to: mullite premix A, 25 parts; the particle diameter is 90 mesh white corundum Sand, 50 parts; white corundum sand with a particle size of 120 mesh, 25 parts. Others are the same as in Embodiment 1.

Embodiment 3

[0074] The refractory box for sapphire annealing is formed by pressing and sintering the main ingredients after adding colloid; the components and parts by weight of the main ingredients are: mullite premix B, 25 parts; the particle diameter is 80 mesh and White corundum sand, 50 parts; white corundum sand with a particle size of 100 mesh, 25 parts. The composition of the colloid is: dry dextrin, water, 50% polyethylene glycol and glycerin; 3 parts of dry dextrin, 1 part of water, 2 parts of 50% polyethylene glycol and 1 part of glycerin are added to every 100 parts of main ingredients , are calculated by weight.

[0075] The formula of described mullite premix B is: 99.8% alumina powder (Al 2 o 3 ) and first-grade Suzhou soil by weight in a ratio of 60 parts of alumina and 40 parts of first-grade Suzhou soil (based on dry material).

[0076]The refractory box for sapphire annealing is a box-type or box-type combined box; the box-type or box-type combined box includes a enc...

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Abstract

The invention discloses a fire-resistant case for annealing sapphire and a production method thereof. The fire-resistant case for annealing sapphire is formed by adding colloid into main ingredients and then pressing and sintering; the main ingredients include mullite premixture and white emery, wherein the mullite premixture is prepared by high-purity aluminum oxide, silica and high-quality kaolin; the fire-resistant case for annealing sapphire comprises a defensive wall, a bottom board, a cover board and an interior middle lamina board which form a relatively closed space. The production method of the fire-resistant case for annealing sapphire comprises the steps of proportioning the mullite premixture; carrying out ball milling; carrying out spray drying; mixing; carrying out dry mixing; adding colloid; homogenizing; pressing; and sintering to obtain finished product. According to the fire-resistant case for annealing sapphire and the production method thereof, the sapphire annealing technique can be simplified, a special vacuum or inert gas protection electric furnace or an expensive tungsten alloy fire-resistant bracket case is unnecessarily adopted for sapphire annealing, the production difficulty and cost of the sapphire annealing technique can be greatly lowered, the investment of equipment and fire-resistant case in the sapphire annealing procedures can be greatly saved.

Description

technical field [0001] The invention relates to the field of sapphire production equipment, in particular to a refractory box for sapphire annealing and a manufacturing method thereof. Background technique [0002] At present, high-purity alumina single crystal is used to produce sapphire internationally and domestically, and a special high-temperature crystal pulling furnace is used for pulling single crystal. The manufacture of this crystal pulling furnace is basically monopolized by developed countries such as the United States and Japan, and the cost per piece is as high as 4 million yuan. , The growth rate of single crystal is slow, the cost of artificially pulling sapphire single crystal is high, and the output is low. [0003] Reprocessing on sapphire wafers produces artificial sapphire jewelry handicrafts or other special industrial parts. After the sapphire product is processed from a single wafer, it must go through an annealing process at 1500°C-1600°C to finall...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 张亮李顺禄
Owner 湖南华联特种陶瓷有限公司
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