|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Electrical Effect and Influence Factors of Tourmaline
||Qi Lu, Bowen Li, Feng Bai
|On-Site Speaker (Planned)
Tourmaline is a crystalline boron silicate mineral with special electrical and optical behaviors. In this study, electrical performances of crystalline tourmaline samples from various deposit sites in China were evaluated. The results show that the piezoelectric constants of tourmalines, in a fixed crystalline direction, depend on their mineral species and the specialty elements in the crystal. The piezoelectric constant of dravite is higher than that of lithium tourmaline. The variety of piezoelectricity is resulted from the element type in crystal structure. Dielectric properties tests showed that tourmaline is a low dielectric constant material. The range of dielectric constant is between 4×10-12pf/cm and 10×10-12pf/cm.The dielectric constant along C axis is higher than that in any other directions. Under room temperature, pyroelectric property of a crystal is proportional to the dielectric properties, and negatively correlated to the ferric oxide ratio.
||Planned: A print-only volume