Materials and methods for pressure and temperature sensors at cr

Details Materials and methods for pressure and temperature sensors at cr Materials and methods for pressure and temperature sensors at cr

1984-06-01

1985-10-08

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Combined

73753, 361282, 361283, 374143, 374184, G01L 912

Patent

active

045452547

ABSTRACT:
Capacitive pressure and temperature sensing devices for use at cryogenic temperatures are provided utilizing a quantum ferroelectric pyrochlore ceramic material as the dielectric. The ceramic material has the formula:

REFERENCES:
patent: 2805165 (1957-09-01), Goodman
patent: 3649891 (1972-03-01), Lawless
patent: 4283752 (1981-08-01), Layton
patent: 4377840 (1983-03-01), Nair
Lawless, "Capacitive Energy Storage at 77K in a Titanate Glass-Ceramic", Proceedings of the XIIIth International Congress of Refrigeration, Washington, DC, 1971, vol. 1, pp. 599-603.
Lawless, "Specific Heats of Lead and Cadmium Niobates at Low Temperatures", Physical Review, vol. 19, No. 7, Apr. 19, 1979, pp. 3755-3760.
Clarke et al., "Quantum-Ferroelectric Pressure Sensor", Ferroelectrics, 1983, vol. 50, pp. 257-262.

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