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Alumina abrasive material production method and product thereof

A production method, alumina technology, applied in chemical instruments and methods, alumina/aluminum hydroxide, other chemical processes, etc., can solve problems such as strengthening and toughening structures

Inactive Publication Date: 2017-10-13
白鸽磨料磨具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sol-gel abrasive synthesized by this method is a homogeneous single-phase structure formed by submicron alpha alumina, without other phase reinforcement or toughening, and it is not as good as abrasives with reinforced and toughened structures in grinding applications under high pressure

Method used

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  • Alumina abrasive material production method and product thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The production method of alumina abrasive provided by the invention comprises the steps:

[0043] (1) Prepare sol, mix deionized water, dispersed alpha monohydrate aluminum hydroxide and nitric acid to prepare sol dispersion, the mixing equipment can be high shear mixer or ball mill or sand mill, the prepared sol dispersion The solid content is between 25% and 30%.

[0044] (2) Introduce seed crystals, add dispersed particle size D to the sol dispersion 50 The alpha alumina dispersion liquid of 100-200 nanometers is used as the seed crystal. The seed crystal can promote the sintering process, reduce the sintering temperature and time, reduce the growth of alumina crystals, and form a matrix material formed by submicron alpha alumina crystals.

[0045] Nano-alpha alumina seed crystals can be purchased from Japan's Sumitomo Corporation, Daming Corporation or other companies. The size of the original crystal is about 30 nanometers, the content of the alpha phase is great...

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Abstract

The present invention relates to an alumina abrasive material production method and a product thereof. The production method comprises: (1) preparing a sol, wherein deionized water, dispersed alpha monohydrate aluminium hydroxide and nitric acid are mixed to prepare a sol dispersion; (2): introducing a seed crystal, wherein an alpha alumina dispersion liquid having a dispersed particle size D50 of 100-200 nm as a seed crystal is added to the sol dispersion; (3): introducing a reinforcing material wherein alumina particles having a dispersed particle size D50 of 1-5 [mu]m as a reinforcing material is continuously added to the sol dispersion; (4) drying; (5) breaking or molding; (6) calcining; and (7) sintering to prepare the alumina abrasive material. According to the present invention, with the production method and the product thereof, the sol-gel alumina abrasive material having the reinforcing and toughening double phase structure can be obtained, and the emission of the nitrogen oxide waste gas can be reduced.

Description

technical field [0001] The invention relates to the field of metal oxides, in particular to metal oxide abrasives, in particular to a production method of alumina abrasives and products thereof. Background technique [0002] Since the early 1980s, sol-gel technology has been used to improve the performance of alumina abrasives. When the sol-gel method is applied to coated abrasives and bonded abrasives, the grinding efficiency is improved compared with traditional fused corundum. 50% to 100%, and the grinding life increased by 3 to 5 times, which had an impact on the coated abrasive and bonded abrasive industry. The sol-gel process allows a much greater degree of control over the alumina microstructure than the electrofusion process. The microstructure of the fused alumina abrasive is mainly determined by the cooling rate during the melt cooling process. The faster the cooling rate, the smaller the crystal size, the better the self-sharpness of the abrasive, the better the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14C01F7/02
CPCC09K3/1418C01F7/02
Inventor 王胜国刘明耀洪凌
Owner 白鸽磨料磨具有限公司