α-alumina particles and method for manufacturing the same
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United States of America Patent
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Mar 28, 2017
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Aug 27, 2015
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Sep 27, 2013
filing date -
Sep 28, 2012
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Abstract
The present invention aims to provide a simple and efficient method for manufacturing α-alumina particles, main component particles of which each have a crystal face other than the face [001] as a main crystal face and a polyhedral shape other than a hexagonal bipyramidal shape. According to the method for manufacturing α-alumina particles of the present invention, when an aluminum compound is calcined in the presence of a specific content of a metal compound, α-alumina particles each having a particle diameter of 50 μm or less, a degree of α crystallization of 90% or more, and a polyhedral shape can be obtained.
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