Pyroelectric and Piezoelectric Properties of Lithium Tetraborate Single Crystal
- 1 January 1985
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 24 (S2) , 727
- https://doi.org/10.7567/jjaps.24s2.727
Abstract
Pyroelectric. piezoelectric and dielectric properties of single crystal Li2B4O7 (LTB) are measured in the temperature range from 50°C down through -150°C. At room temperature LTB has dielectric constant K 3∼10 (at 100 KHz) and dielectric tan δ∼1 (10 KHz). At liquid nitrogen temperatures, the tan δ decreased to ∼10-3. Pyroelectric coefficient at room temperature measured ∼30 µC/m2-K which increased to -120 µC/m2-K at -150°C and showed the pyroelectric figure of merit p/K comparable to the value obtained on TGS at room temperature. Primary and secondary components of pyroelectricity are separated and the results suggest that the major contribution comes from the primary effect in Li2B4O7. Piezoelectric measurements show high values of g 33≃270×10-3 V-m/N and g h≃100×10-3 V-m/N indicating potential application of Li2B4O7 in the area of pressure sensors.Keywords
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