Nano corundum abrasive and preparation method thereof

A technology of abrasives and corundum, applied in the field of nano-corundum abrasives and its preparation, can solve the problems of easy cracking of products, health hazards, residual holes, etc., and achieve the effects of increasing hard points, prolonging service life, and reducing the depth of scratches

Active Publication Date: 2016-05-18
洛阳三睿宝纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the raw materials used in SG abrasives are relatively expensive, and some raw materials are organic matter, which is harmful to health; secondly, the entire sol-gel process usually takes a long time, often several weeks or months: the third is the gel in the There are a lot of micropores, and a lot of gas and organic matter will escape during the drying process, and shrinkage will occur, leaving holes, and the product is easy to crack

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing nano-corundum abrasives, comprising the following steps: step 1, pre-calcining boehmite nano-crystals or nano-whiskers at 570° C. for 60 minutes, and then cooling down to room temperature at a cooling rate of 10° C. / min to obtain grains Nanocrystalline alumina powder with a diameter of 20-200nm, for standby;

[0022] Step 2, after calcining nano-magnesium hydroxide at 400°C for 20 minutes, cooling to room temperature at a cooling rate of 10°C / min to obtain nano-magnesium oxide with a particle size of 10-100nm, for subsequent use;

[0023] Step 3, take each raw material according to the percentage by weight of 5% nano-magnesia, 5% silicon dioxide, 3% calcium oxide and 87% nano-crystalline alumina powder, carry out pneumatic homogenization, then add weight and nano-magnesia, The total weight of silica, calcium oxide and nanocrystalline alumina powder is the same as deionized water, and the weight accounts for 6% of the total weight of nano-magnesia,...

Embodiment 2

[0025] A method for preparing nano-corundum abrasives, comprising the following steps: step 1, pre-calcining boehmite nano-crystals or nano-whiskers at 500° C. for 40 minutes, and then cooling down to room temperature at a cooling rate of 6° C. / min to obtain granules Nanocrystalline alumina powder with a diameter of 20-200nm, for standby;

[0026] Step 2, after calcining nano-magnesium hydroxide at 400°C for 20 minutes, cooling to room temperature at a cooling rate of 8°C / min to prepare nano-magnesium oxide with a particle size of 10-100nm, for subsequent use;

[0027] Step 3, take each component according to the weight ratio of 3% nano-magnesia, 2% silicon dioxide, 1.5% calcium oxide and 93.5% nano-crystalline alumina powder, carry out pneumatic homogenization, then add weight and nano-magnesia , the same deionized water as the total weight of silica, calcium oxide and nanocrystalline alumina powder, and 3% dextrin by weight of the total weight of nano-magnesia, silica, calci...

Embodiment 3

[0029] A method for preparing nano-corundum abrasives, comprising the following steps: step 1, pre-calcining boehmite nano-crystals or nano-whiskers at 600° C. for 10 minutes, and then cooling down to room temperature at a cooling rate of 5° C. / min to obtain grains Nanocrystalline alumina powder with a diameter of 20-200nm, for standby;

[0030] Step 2, after calcining nano-magnesium hydroxide at 400°C for 20 minutes, cooling to room temperature at a cooling rate of 5°C / min to obtain nano-magnesium oxide with a particle size of 10-100nm, for subsequent use;

[0031] Step 3, take each component according to the weight ratio of 1% nano-magnesia, 1% silicon dioxide, 1.3% calcium carbonate and 96.7% nano-crystalline alumina powder, carry out pneumatic homogenization, then add weight and nano-magnesia , the same deionized water as the total weight of the silica, calcium carbonate and nanocrystalline alumina powder, polyethylene whose weight accounts for 1.5% of the total weight of ...

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Abstract

The invention discloses a nano corundum abrasive and a preparation method thereof. The abrasive comprises raw materials and a binder with the weight accounting for 0-6% of the total weight of the raw materials, wherein the raw materials comprise components in percentage by weight as follows: 0-5% of magnesium oxide, 0-5% of silicon dioxide, 0-3% of calcium oxide and the balance of nanocrystalline aluminum oxide powder. The prepared corundum abrasive adopting the nano structure has single crystal particles ranging from dozens of nanometers to hundreds of nanometers, sintered bodies have the enormous crystal boundary, only nanocrystals fall off under the action of external forces or in sharping or trimming, sharp cutting edges are produced continuously, the self-sharpening property is good, products are good in abrasion resistance and have less grinding heat, and the grinding efficiency is high.

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials, in particular to a nano-corundum abrasive and a preparation method thereof. Background technique [0002] Abrasives are sharp, hard materials used to grind the surface of softer materials. There are two types of abrasives: natural abrasives and artificial abrasives. According to the classification of hardness, there are two categories of superabrasives and ordinary abrasives. Abrasives run the gamut from softer household detergents, gemstone abrasives, to the hardest material, diamond. Abrasives are an essential material in the manufacture of every precision product. Many natural abrasives have been replaced by artificial abrasives. Except for diamonds, the performance of natural abrasives is not stable, but they still have their use value. Diamond is the abrasive with the highest hardness. It is mainly produced in South Africa, accounting for 95% of the world's total output....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14
CPCC09K3/1427
Inventor 许荣辉李洛利肖民乐
Owner 洛阳三睿宝纳米科技有限公司
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