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slightmiss  
#1 Posted : Tuesday, March 12, 2019 8:01:16 AM(UTC)
slightmiss

Rank: Member

Groups: Registered
Joined: 3/2/2019(UTC)
Posts: 25
China
Location: zhengzhou


The explanation for the different effectiveness of a given abrasive under differing grinding applications is often not clearly understood, but is related to the chemical composition, microstructure, and the related physical properties of the abrasive such as hardness, fracture toughness, impact strength, and thermal properties. Lack of such understanding makes difficult the prediction of the effectiveness of a given abrasive for a particular application in the absence of prior experience. Relatively new types of sintered abrasives made from dried alumina gels by sintering have been developed. One such type is that disclosed in U.S. Pat. No. 4,314,827. In particular, the embodiment of that invention disclosed in examples 19 to 29 (containing 4 to 8% MgO) is being produced on a commercial basis. Grinding wheel made in China faces a big challenge. Another alumina abrasive grit produced from a gel is disclosed is E.P.O. Application No. 85100506.6. That abrasive grit can be essentially pure alumina or may also contain MgO, and is made from gels which have been seeded with submicron alpha alumina particles.
ParkerGemis  
#2 Posted : Tuesday, January 18, 2022 7:44:12 AM(UTC)
ParkerGemis

Rank: Advanced Member

Groups: Registered
Joined: 8/4/2021(UTC)
Posts: 70
Australia
Location: London

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