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US 2011/0277680 A1Published application
Artificial corundum crystal
AssigneeDai Nippon Printing Co., Ltd.
InventorsKatsuya TESHIMA, Shuji OISHI
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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 has at least one crystal face selected from {113}, {012}, {014}, {113}, {110}, {101}, {116}, {211}, {122}, {214}, {100}, {125}, {223}, {131}, and {312} faces. The process for producing the artificial corundum crystal is 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.
Claims5
A process for producing an artificial corundum crystal,
- wherein an artificial corundum crystal having a hexagonally dipyramidal shape as its base shape is produced 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 a flux evaporation as a driving force,
- wherein the flux contains an evaporation inhibitor,
- wherein the evaporation inhibitor is an alkali metal compound, and
- wherein the alkali metal compound is a compound which is heated to generate at least one kind of alkali metal oxide selected from a group consisting of Li2O, Na2O, and K2O.
1 more element
Dependencies are inferred from the claim text.