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2 749 825

(13)

(51)

IPC

C30B11/00(2006-01-01)

C30B29/16(2006-01-01)

C30B29/30(2006-01-01)

(21) (22)

Application

2018107517, 2018-03-01

(24)

Start date

2018-03-01

(22)

Actual filing date

2018-03-01

(45)

Published

2021-06-17

(72)

Inventor

Hoshikawa, KeigoFujiwara, YasuyukiKohama, KeiichiNakanishi, ShinjiKobayashi, TakumiOhba, Etsuko

(73)

Holder

Fujikoshi Machinery Corp.Shinshu University

DEVICE FOR PRODUCING MONOCRYSTALS Russian patent published in 2021 - IPC C30B11/00 C30B29/16 C30B29/30

Abstract RU 2749825 C2

FIELD: non-ferrous metallurgy equipment.

SUBSTANCE: invention relates to equipment for growing monocrystals. Device 10 for producing monocrystals β-Ga₂O₃ or LiTaO₃ in an oxidizing atmosphere contains base 12, heat-resistant cylindrical furnace body 14 placed above base 12, cover 16a, or 16b, or 16c covering furnace body 14, heater 20 placed inside furnace body 14, high-frequency winding 22 heating heater 20 due to high-frequency induction heating, and a crucible heated by heater 20, and heater 20 contains a Pt-Rh alloy having a Rh content of 10 to 30 wt % and has a coating of zirconium oxide on the entire surface of the heater.

EFFECT: use of a heater made of a platinum-based alloy with a zirconium coating prevents its oxidative destruction, providing the possibility of repeated use of the heater, and also prevents the dissolution of the product of oxidative destruction in the crystal, allowing to obtain single crystals β-Ga₂O₃ and LiTaO₃ of high quality.

4 cl, 14 dwg, 1 ex

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RU 2 749 825 C2

Authors

Hoshikawa, Keigo

Fujiwara, Yasuyuki

Kohama, Keiichi

Nakanishi, Shinji

Kobayashi, Takumi

Ohba, Etsuko

Dates

2021-06-17—Published

2018-03-01—Filed