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Fire-resistant case for annealing sapphire and production method thereof

A production method and sapphire technology, applied in the field of refractory boxes for sapphire annealing and its production, can solve the problems of high quality requirements for operators, no identical or similar products found, difficult management, etc.

Active Publication Date: 2014-09-03
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 complicated. The quality of the operators is high, the management is difficult, and the annealing cost is high.
[0005] After searching, no identical or similar domestic prior art was found in this technical field

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] Described refractory box for sapphire annealing and its manufacture method, change the component and the parts by weight of the main ingredient in embodiment one into: mullite premix A, 25 parts; 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 refractory box for sapphire annealing and a manufacturing method thereof. The refractory box for sapphire annealing is formed by pressing and sintering the main ingredients after adding colloid; the main ingredients are mullite premix and white corundum sand prepared from high-purity alumina, silicon dioxide, and high-quality kaolin; The refractory box for sapphire annealing includes enclosure, bottom plate, cover plate and internal middle layer plate; forming a relatively sealed space. The manufacturing method of the refractory box for sapphire annealing includes: premixing of mullite; ball milling; spray drying; batching; dry mixing; glue addition; homogenization; pressing; sintering; finished product. The invention can simplify the sapphire annealing process, so that the sapphire annealing does not need to use a special vacuum or an inert gas-protected electric furnace and an expensive tungsten alloy refractory bracket box, which greatly reduces the production difficulty and cost of the sapphire annealing process, and greatly saves sapphire. The input of equipment and refractory boxes in the annealing process.

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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Patent Type & Authority Patents(China)
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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