Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Including specific material of construction
Patent
1985-07-24
1987-08-11
Lacey, David L.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Including specific material of construction
156607, 156617SP, 156DIG83, C30B 2702
Patent
active
046860916
ABSTRACT:
An apparatus has a crucible for containing a GaAs raw material melt and a B.sub.2 O.sub.3 liquid encapsulating material therein, a heat generator arranged around the crucible so as to be coaxial therewith, and a heat insulator assembly arranged around the heat generator to surround the heat generator and the crucible for the purpose of manufacturing a compound semiconductor single crystal by pulling it from the raw material melt in the crucible by the LEC method. In the heat insulator assembly of the apparatus of the above construction, an upper heat insulator, arranged above the crucible and having at its center a circular hole for receiving the single crystal being pulled, comprises a plurality of radially divided sector-shaped split members. The split members are sintered bodies having aluminum nitride (AlN) as a major constituent.
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patent: 1370113 (1921-03-01), Janusonis
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patent: 3715194 (1973-02-01), Plooster
patent: 4478675 (1984-10-01), Akai
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Nakanishi Masae
Washizuka Syoichi
Watanabe Masayuki
Yashiro Sadao
Gzybowski Michael S.
Kabushiki Kaisha Toshiba
Lacey David L.
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