Factors Influencing Ultrasonic Wave Propagation in Tourmaline

Abstract

Abstract P-wave propagation velocity in tourmaline is related to its microstructure, chemical composition, temperature, and other factors. The effects of tourmaline density, FeO contents, and temperature on P-wave propagation were studied in this paper. The results show that the temperature affects P-wave velocity due to the temperature dependence of thermal expansion, and elastic and dielectric constants of tourmaline. The propagation velocity of P-wave decreases with increasing porosity or FeO content. The content of FeO in tourmaline can be used as the basis for the determination of different species of tourmaline, which provides an important experimental basis for ultrasonic waves to be used as a nondestructive testing technology to distinguish different types of tourmaline.