An ultralinear stress-compensated temperature sensor
Abstract
Stress-compensated quartz resonators having ultralinear frequency-temperature responses (NLSC cuts) have been discovered. They consist of doubly rotated cuts in which the orientations, defined in terms of the polar angles phi(0) and theta(0), lie on a locus where the second-order temperature coefficients of frequency are zero in the range of phi(0) = 20 deg + or - 2 deg and theta(0) = 20 deg + or - 5 deg. These angles of orientation are in close proximity to, or on the locus of, zero frequency coefficients of stress. In the vicinity of the NLSC cuts, a relatively strong 1,2,-3,1 X-ray plane has been found to exist at the quartz crystal orientation of phi(0) substantially equal to 19.1 deg and theta(0) substantially equal to + 16.6 deg. This X-ray plane makes the manufacture of NLSC cuts easier and cheaper than ones previously reported. The theoretical and experimental values of the frequency-temperature responses and some physical features for NLSC cuts are discussed.
- Publication:
-
IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control
- Pub Date:
- March 1987
- Bibcode:
- 1987ITUFF..34..270N
- Keywords:
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- Compensation;
- Quartz Crystals;
- Resonant Frequencies;
- Resonators;
- Stresses;
- Temperature Sensors;
- Cartesian Coordinates;
- Metrology;
- Piezoelectricity;
- Instrumentation and Photography