Electroacoustic properties of quartz minerals in a finely dispersed state.

The authors described a new method for studying the electroacoustic properties of piezoelectric particles and substances in a finely dispersed state. They obtained the values of the quality factor and the amplitude of electro-elastic vibrations of piezoelectric quartz particles with an average size of 75 microns. To observe the high-frequency response, the generator excited quartz powders with a pulsed electric field with a frequency of 16.5 MHz. The characteristics and quality factor of electro-elastic vibrations of powder particles of the following types of quartz were determined: artificial, smoky, citrine, amethyst, re-crystallized, veined granular, veined poleshaped. The content of impurities in the minerals of quartz is given. The presence of aluminum ions Al3+ in quartz minerals also causes a strong increase in the quality factor of electro-elastic vibrations of piezoelectric particles, which may also be associated which may be associated with a change in the surface charge of quartz particles. The authors also carried out studies on the distribution of quality factor and response amplitudes electro-elastic vibrations over regions of a large citrine plate. [ABSTRACT FROM AUTHOR]