AlN crystal preparation method, AlN crystals, and organic compound including AlN crystals
AssigneeNational University Corporation Nagoya University
InventorsToru Ujihara, Yukihisa Takeuchi, Mingyu Chen, Masashi Nagaya
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Abstract
A method for producing AlN crystals includes using at least one element, excluding Si, that satisfies a condition under which the element forms a compound with neither Al nor N or a condition under which the element forms a compound with any of Al and N provided that the standard free energy of formation of the compound is larger than that of AlN; melting a composition containing at least Al and the element; and reacting the Al vapor with nitrogen gas at a predetermined reaction temperature to produce AlN crystals.
Claims16
A method for producing AlN crystals, comprising:
- using an alloy comprising Al and an element, excluding Si, that satisfies a condition under which the element forms a compound with neither Al nor N or a condition under which the element forms a compound with either of Al and N provided that the standard free energy of formation of the compound is larger than that of AlN;
- melting the alloy;
- introducing nitrogen gas to establish an atmosphere of nitrogen gas;
- reacting the Al with the nitrogen gas at a predetermined temperature and at a predetermined pressure to produce AlN crystals, wherein the AlN crystals comprise AlN whiskers,
- wherein a first interaction energy between Al and the element becomes negative, and an absolute value of the first interaction energy is larger than a second interaction energy between Al and Ge.
A method for producing AlN crystals, comprising:
- using an alloy consisting of Al and Fe, excluding Si;
- melting the alloy;
- introducing nitrogen gas to establish an atmosphere of nitrogen gas;
- reacting the Al with nitrogen gas at a predetermined temperature and at a predetermined pressure to produce AlN crystals, wherein the AlN crystals comprise AlN whiskers,
- wherein a first interaction energy between Al and Fe becomes negative, and
- wherein an absolute value of the first interaction energy is larger than a second interaction energy between Al and Ge.
Dependencies are inferred from the claim text.