ALPHA QUARTZ PIEZOELECTRIC CONSTANT FOR HIGH TRANSIENT STRESS
The one-dimensional strain piezoelectric constant for X-cut synthetic quartz was determined for impact stress from 4 to 40 kbar. Flat cylinders of quartz were impacted upon each other with precise alignment control. The impact stress was computed from the measured impact velocity and the piezoelectric charge was obtained from shortcircuited current measurements. The specimens were a guard-ring'' type geometry to insure one-diimensional strain and electric field. Below 8 kbar the piezoelectric ratio of electric eharge to stress was 2.04 x 10/sup -8/ coul,/ cm/sup 2/kbar which agreed with low signal constants within the experimental error of 3%.. For +X oriented crystals between 10 and 21 kbar the ratio was 2.16. At 21 kbar the ratio of the change in electric charge for a change in stress increased to 3.3 x 10/sup -8/ coul,/cm/sup 2/kbar and did not change to at least 40 kbar. A definite dielectric anomaly existed above 10 kbar for -X oriented crystals. (auth)
- Research Organization:
- Sandia Corp., Albuquerque, N. Mex.
- DOE Contract Number:
- AT(29-1)-789
- NSA Number:
- NSA-16-010677
- OSTI ID:
- 4809757
- Report Number(s):
- TID-14984
- Country of Publication:
- United States
- Language:
- English
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