Titania thermistor and method of fabricating
AssigneeFord Motor Company
InventorsStanley R. Merchant, Michael J. Cermak
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Abstract
A high temperature thermistor and its method of fabrication are disclosed. The thermistor is fabricated from titanium dioxide ceramic forming material and is fabricated to achieve a high degree of densification approaching 100% of theoretical density. At elevated temperatures in the range of from about 700.degree. F. to about 1500.degree. F. densified titania ceramic material behaves as a semiconductor having a resistance which is responsive principally to the temperature of the thermistor element. The thermistor is fabricated by processing titania powder which includes a substantial majority of rutile phase material. The titania powder is processed to achieve a thermistor chip or member which demonstrates a high degree of density.
Claims4
The method of manufacture of a thermistor operable at temperatures in excess of about 700.degree. F. comprising the steps of forming a powder of high temperature stable phase ceramic forming metal oxide;
- preparing sinterable wafers from said powder;
- affixing electrodes to said wafers;
- and
- sintering said wafers to achieve a ceramic body having a density greater than about ninety-seven percent (97%) of theoretical density.
Dependencies are inferred from the claim text.