Compositions – Electrically conductive or emissive compositions – Metal compound containing
Patent
1981-08-20
1984-06-05
Barr, Josephine
Compositions
Electrically conductive or emissive compositions
Metal compound containing
252519, 29612, 29620, 338 22R, 338308, H01B 106
Patent
active
044527268
ABSTRACT:
A thick film cermet thermistor having a low to moderate electrical resistivity but high resistance to abrasion and humidity is disclosed. The thermistor composition has a sintering aid and a sealing glass that soften at significantly different temperatures. The thermistor film is sintered after application to a substrate predominantly between the two softening point temperatures. Sintering temperature is raised above the higher softening point temperature long enough to glaze the thick film and bond it to the substrate but not long enough to substantially increase film resistance. A composition is disclosed that can be sintered under the same firing conditions for resistor and conductor films, permitting one firing to be used to sinter all three types of films.
REFERENCES:
patent: 3928243 (1975-12-01), Kudza et al.
patent: 4076894 (1978-02-01), Langley et al.
patent: 4101708 (1978-07-01), Larry
patent: 4312770 (1982-01-01), Yu et al.
Ewing Keith E.
Palanisamy Ponnusamy
Barr Josephine
General Motors Corporation
Wallace Robert J.
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