In:
Materials Science Forum, Trans Tech Publications, Ltd., Vol. 868 ( 2016-8), p. 61-67
Abstract:
Liquid crystal (LC) polymer, composited with inorganic filler, has a broad application prospect in electronic and electrical industry. In this research, permittivity ( ε r ) and dielectric loss tangent (tan δ ) of LC composites under different temperatures and frequencies were investigated, and activation energies were calculated and analyzed. At low temperatures and high frequencies, LC composites exhibited well dielectric properties. ε r changed a little (3.6~4.0) in temperature range of-60°C~160°C when frequency was higher than 10Hz, but increased sharply when temperatures was higher than 100°C and frequency was lower 10Hz. The tan δ increased sharply with increasing temperature when temperatures was higher than 100°C and frequency was lower than 10 2 Hz, and when frequency was above 10 2 Hz, the value of tan δ changed gently (10 -3 ~10 -2 ). The peak of tan δ would translate to higher frequencies direction with increasing temperature in tan δ -frequency curve, and to higher temperatures direction with increasing frequency in tan δ -temperature curve. Activation energy is calculated by fitting the peak of the imaginary of the electric modulus, and activation energy is 0.43eV in low temperature and 1.59eV in high temperature.
Type of Medium:
Online Resource
ISSN:
1662-9752
DOI:
10.4028/www.scientific.net/MSF.868
DOI:
10.4028/www.scientific.net/MSF.868.61
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2016
detail.hit.zdb_id:
2047372-2
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