Artificial corundum crystal
AssigneeDai Nippon Printing Co., Ltd.
InventorsKatsuya Teshima, Shuji Oishi
Life of this patent
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Abstract
An artificial corundum crystal which can be put into practical use at low costs, and a process for producing the same. The artificial corundum crystal contains a seed crystal and has at least one crystal face selected from a {113} face, a {012} face, a {104} face, a {110} face, a {101} face, a {116} face, a {211} face, a {122} face, a {214} face, a {100} face, a {125} face, a {223} face, a {131} face, and a {312} face. The process for producing the artificial corundum crystal an artificial corundum crystal having a hexagonally dipyramidal includes forming with a seed crystal by a flux evaporation method of heating a sample containing a raw material and a flux to precipitate a crystal and grow the crystal by use of flux evaporation as a driving force.
Claims16
An artificial corundum crystal containing a seed crystal and having at least one crystal face selected from the group consisting of a {113} face, a {012} face, a {104} face, a {110} face, a {101} face, a {116} face, a {211} face, a {122} face, a {214} face, a {100} face, a {125} face, a {223} face, a {131} face, and a {312} face, wherein a basic shape of the seed crystal is a hexagonally dipyramidal shape.
An artificial corundum crystal containing a seed crystal and having a dominant crystal face other than a {001} face, wherein a basic shape of the seed crystal is a hexagonally dipyramidal shape.
A process for producing an artificial corundum crystal, wherein an artificial corundum crystal having a hexagonally dipyramidal shape as its base shape is formed with a seed crystal by a flux evaporation method of heating a sample containing a raw material and a flux to precipitate a crystal and grow the crystal by use of flux evaporation as driving force, and wherein a basic shape of the seed crystal is a hexagonally dipyramidal shape.
Dependencies are inferred from the claim text.