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Method for preparing wear-resisting aluminum oxide ceramic by virtue of rare earth compound
The invention discloses a method for preparing wear-resisting aluminum oxide ceramic by virtue of a rare earth compound. Raw materials of the aluminum oxide ceramic consist of the following components in percentage by mass: 69-99.7% of aluminum oxide, 0.0001-5% of a rare earth compound which is a compound of gadolinium, scandium, europium and lutecium, and 0.1-30% of a composite additive which is a compound of calcium, magnesium and silicon or a mineral. The method comprises the following materials: preparing materials according to a preparing ratio; ball-milling and grinding the prepared materials in a ball mill and uniformly mixing the materials; drying the uniformly mixed materials; preparing a blank by virtue of isostatic forming, roller forming or axial-compression forming; and sintering the obtained blank at 1000-1600 DEG C, preserving heat for 0.5-5hr, and naturally cooling to room temperature so as to obtain a finished product. By adding trace amount of the rare earth compound, the prepared aluminum oxide ceramic is fine in grain size and high in density. The method disclosed by the invention is simple in production process and low in requirement on equipment, and the prepared aluminum oxide ceramic is high in wear resistance and has a good application prospect.
Method for preparing wear-resisting aluminum oxide ceramic by virtue of rare earth compound
The invention discloses a method for preparing wear-resisting aluminum oxide ceramic by virtue of a rare earth compound. Raw materials of the aluminum oxide ceramic consist of the following components in percentage by mass: 69-99.7% of aluminum oxide, 0.0001-5% of a rare earth compound which is a compound of gadolinium, scandium, europium and lutecium, and 0.1-30% of a composite additive which is a compound of calcium, magnesium and silicon or a mineral. The method comprises the following materials: preparing materials according to a preparing ratio; ball-milling and grinding the prepared materials in a ball mill and uniformly mixing the materials; drying the uniformly mixed materials; preparing a blank by virtue of isostatic forming, roller forming or axial-compression forming; and sintering the obtained blank at 1000-1600 DEG C, preserving heat for 0.5-5hr, and naturally cooling to room temperature so as to obtain a finished product. By adding trace amount of the rare earth compound, the prepared aluminum oxide ceramic is fine in grain size and high in density. The method disclosed by the invention is simple in production process and low in requirement on equipment, and the prepared aluminum oxide ceramic is high in wear resistance and has a good application prospect.
Method for preparing wear-resisting aluminum oxide ceramic by virtue of rare earth compound
WU TINGTING (author) / WU BOLIN (author)
2015-04-22
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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