Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1987-10-07
1989-04-18
Bell, Janyce
Coating processes
With post-treatment of coating or coating material
Heating or drying
75252, 106 112, 427 96, 427108, 427123, 4271262, 4271264, 427377, B05D 502, B22F 100
Patent
active
048226459
ABSTRACT:
Metallizing pastes are disclosed, which contain, as inorganic materials, 15 to 50% by weight of a component to form a glass phase and 50 to 85% by weight of a metallic molybdenum powder. The glass phase essentially consists of 5 to 25% by weight of Al.sub.2 O.sub.3, 35 to 55% by weight of SiO.sub.2 and 30 to 55% by weight of MnO. A process for metallizing ceramic members is also disclosed. The metallizing paste is applied to surfaces of the ceramic member and the dried. The ceramic member with the dried metallizing paste is then fired in a temperature range from 1,200.degree. to 1,400.degree. C. for 0.5 to 10 hours in a mixed gas of hydrogen gas and nitrogen gas in which a ratio in partial pressure between steam and hydrogen, (P.sub.H.sbsb.2.sub.O /P.sub.H.sbsb.2), is adjusted in a range from 10.sup.-6 to 10.sup.0.
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Matsui Minoru
Oda Isao
Tsuno Nobuo
Bell Janyce
NGK Insulators Ltd.
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