Melt molding method of germanium

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United States of America Patent

PATENT NO 9352997
APP PUB NO 20150001752A1
SERIAL NO

13928994

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Abstract

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In a melt molding method of germanium, the germanium which is brought into a molten state is sealed in molding dies in an inert gas atmosphere. The molding dies are temperature-controlled from the outside. While gradually cooling the molding dies at a portion or a plurality of portions thereof up to the whole, the germanium is gradually solidified from a side of the portion or sides of the plurality of portions up to the whole. An external ambient temperature of the molding dies is controlled to decrease gradually while ensuring a temperature below a germanium melting point temperature but higher than an inner temperature of the molding die which is cooled. After solidification of the germanium is completed, cooling of the molding dies is continued, and the external ambient temperature is decreased to mold the germanium.

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Patent Owner(s)

Patent OwnerAddress
NACHI-FUJIKOSHI CORPTOKYO JAPAN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tanaka, Kunihiro Toyama, JP 29 635

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