A kind of production method of single crystal corundum

A technology of single crystal corundum and production method, applied in the directions of single crystal growth, single crystal growth, crystal growth, etc., can solve the problems of low yield and processing, and achieve the effect of powder particle size concentration

Active Publication Date: 2017-05-10
SANXIANG ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the single crystal fused aluminum products with good quality and strong wear resistance are naturally crystallized, and cannot be processed by large particle crushing, so the yield is relatively low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A production method of single crystal corundum in this embodiment is to grind α-alumina powder to a median particle size of 1 μm, then add an inhibitor, mix evenly and then smelt at 1500°C, let it stand and cool after fully melting, The time for standing and cooling is 8 hours, and the mixture after standing and cooling is hydrolyzed to obtain single crystal corundum. The mass ratio of the α-alumina powder to the inhibitor is 24:1, and the inhibitor includes the following mass Percentage of components: titanium oxide 1% and sulfur 3%.

Embodiment 2

[0026] A production method of single crystal corundum in this embodiment is to grind α-alumina powder to a median particle size of 5 μm, then add an inhibitor, mix evenly and then smelt at 1700°C, let it stand and cool after fully melting, The time for standing and cooling is 24 hours, and the mixture after standing and cooling is hydrolyzed to obtain single crystal corundum. The mass ratio of the α-alumina powder to the inhibitor is 7:1, and the inhibitor includes the following mass Percentage of composition: titanium oxide 3%, iron oxide 2% and sulfur 7%.

Embodiment 3

[0028] A production method of single crystal corundum in this embodiment: grind α-alumina powder to a median particle size of 3 μm, then add an inhibitor, mix well and then melt at 1900°C, let it stand and cool after fully melting, The time for standing and cooling is 15 hours, and the mixture after standing and cooling is hydrolyzed to obtain single crystal corundum. The mass ratio of the α-alumina powder to the inhibitor is 11:1, and the inhibitor includes the following mass Percentage of components: titanium oxide 2%, iron oxide 1% and sulfur 5%.

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Abstract

The invention relates to a single crystal corundum production method, which comprises the following steps: grinding alpha-alumina powder to a median particle size of 1-5mu, then adding an inhibitor, smelting at a temperature of 1500-1700 DEG C after mixing uniformly, keeping stand and cooling for 8-24h after melting fully, and hydrolyzing a mixture subjected to standing and cooling to obtain single crystal corundum, wherein the mass ratio of alpha-alumina powder to inhibitor is 6-25 to 1, and the inhibitor comprises the following components in percentage by mass: 1-3% of titanium oxide, 0-2% of iron oxide and 3-7% of sulfur. The single crystal corundum production method provided by the invention has the beneficial effects that the grain size of the generated single crystal corundum is controlled, and the yield is high.

Description

technical field [0001] The invention relates to the technical field of single crystal corundum, in particular to a production method of single crystal corundum. Background technique [0002] Single crystal corundum, that is, single crystal fused alumina (also known as 32A) abrasive, is made of bauxite as the main raw material, mixed with an appropriate amount of sulfide, and smelted at high temperature. It is off-white or light khaki, with high hardness and toughness. Produced by a special process, each particle size product is produced by natural crystallization, not the result of mechanical crushing. Single crystal corundum is a heat-resistant high-grade grinding material with very good toughness. It is used to make advanced cutting and grinding tools. It is suitable for grinding high-hardness and high-toughness materials such as high-vanadium high-speed steel, austenitic stainless steel, and titanium alloy. Especially for dry grinding and grinding of easily deformed and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/20C30B11/02
CPCC30B11/02C30B29/20
Inventor 李小毅叶旦旺范辉邹希根陈美育
Owner SANXIANG ADVANCED MATERIALS
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