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Preparation method of alumina-coated hexagonal boron nitride composite powder for self-lubricating cutter material
The invention relates to a preparation method of alumina-coated hexagonal boron nitride composite powder for a self-lubricating cutter material. The preparation method comprises preparing a hexagonal boron nitride suspension liquid, carrying out ultrasonic dispersion, adding an aluminum nitrate solution into the suspension liquid, slowly and dropwisely adding ammoniacal liquor with pH of 6.5-8.5 into the suspension liquid, carrying out a reaction process at a temperature of 30-40 DEG C until the reaction liquid pH is in a range of 7.0-7.5, stopping ammoniacal liquor dropwise addition, carrying out reaction stirring for 1.5-2.5h, carrying out standing, carrying out deposition and filtration, carrying out centrifugation and washing, carrying out drying to obtain aluminum hydroxide-coated hexagonal boron nitride composite powder, and carrying out vacuum calcination to obtain the alumina-coated hexagonal boron nitride composite powder with the average particle size of 4-12 microns. Through use of the alumina-coated hexagonal boron nitride composite powder in a ceramic matrix, ceramic cutter mechanical properties are improved and self lubricating effects are obtained.
Preparation method of alumina-coated hexagonal boron nitride composite powder for self-lubricating cutter material
The invention relates to a preparation method of alumina-coated hexagonal boron nitride composite powder for a self-lubricating cutter material. The preparation method comprises preparing a hexagonal boron nitride suspension liquid, carrying out ultrasonic dispersion, adding an aluminum nitrate solution into the suspension liquid, slowly and dropwisely adding ammoniacal liquor with pH of 6.5-8.5 into the suspension liquid, carrying out a reaction process at a temperature of 30-40 DEG C until the reaction liquid pH is in a range of 7.0-7.5, stopping ammoniacal liquor dropwise addition, carrying out reaction stirring for 1.5-2.5h, carrying out standing, carrying out deposition and filtration, carrying out centrifugation and washing, carrying out drying to obtain aluminum hydroxide-coated hexagonal boron nitride composite powder, and carrying out vacuum calcination to obtain the alumina-coated hexagonal boron nitride composite powder with the average particle size of 4-12 microns. Through use of the alumina-coated hexagonal boron nitride composite powder in a ceramic matrix, ceramic cutter mechanical properties are improved and self lubricating effects are obtained.
Preparation method of alumina-coated hexagonal boron nitride composite powder for self-lubricating cutter material
XU CHONGHAI (Autor:in) / MA JUN (Autor:in) / YI MINGDONG (Autor:in) / XIAO GUANGCHUN (Autor:in) / CHEN ZHAOQIANG (Autor:in) / CHEN HUI (Autor:in)
09.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2015
| Europäisches Patentamt | 2015
| Europäisches Patentamt | 2020
| Europäisches Patentamt | 2020
| Europäisches Patentamt | 2015