Sensors with high temperature piezoelectric ceramics

Details Sensors with high temperature piezoelectric ceramics Sensors with high temperature piezoelectric ceramics

2007-11-16

2010-02-09

Caputo, Lisa M (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

Reexamination Certificate

active

07658111

ABSTRACT:
A piezoelectric sensor includes a ceramic material that has the formula of [Bi2O2][Am−1BmO3m+1], where m=2, A is mono-, di-, or tri-valent ions or a combination of them, B is transition element such as Fe3+, Ti4+, Nb5+, Ta5+, W6+, Mo6+or a combination of them. The ceramics have high Curie temperature of 900˜940° C. The sensors claimed in the present invention utilize [Bi2O2][Am−1BmO3m+1]ceramics parts as sensing elements in various shapes and dimensions and can be used to sense force, acceleration, and pressure at very high temperatures of 600˜800° C.

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