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High-Temperature Dielectric Relaxations in LiF Single Crystals.
- Source :
- Journal of the American Ceramic Society; Sep2015, Vol. 98 Issue 9, p2784-2788, 5p, 1 Chart, 6 Graphs
- Publication Year :
- 2015
-
Abstract
- By means of dielectric permittivity, electric modulus and impedance, the dielectric properties of LiF single crystals were investigated in the temperature range of 30°C-800°C and frequency range of 50 Hz-10 MHz. Two thermally activated relaxations, R1 and R2, were observed. The relaxation R1 showing activation energy around 0.8 eV was found to be related to the Li-ion diffusion in the crystal. The relaxation R2 contains three Arrhenius segments, the low-, mid-, and high-T segments, separated by boundary temperatures of 325°C and 425°C. These segments in the order of ascending temperature were found to be associated with F<subscript>3</subscript>, F<subscript>3</subscript><superscript>+</superscript> centers, F<subscript>2</subscript> centers, and F centers, respectively. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 98
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 110025246
- Full Text :
- https://doi.org/10.1111/jace.13663