Dictionary of Geotourism

2020 Edition
| Editors: Anze Chen, Young Ng, Erkuang Zhang, Mingzhong Tian

Mineral Piezoelectricity

Reference work entry
DOI: https://doi.org/10.1007/978-981-13-2538-0_1578

Some mineral crystals can change their surface charge properties under pressure or tension. For example, when a-quartz is pressed along its long axis, equal and opposite charges are generated at the two ends, and when the compression is replaced by tension, the charges switch. When a piezoelectric crystal is placed in an alternating electric field, the crystal will expand or contract correspondingly and generate a mechanical vibration equal to the electric frequency. Mineral piezoelectricity has wide applicability in the electronics industry.

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