70/30 mol% P(VDF-TrFE) 공중합체 박막의 주파수에 따른 유전특성

초록

In this study, 70/30 mol% P(VDF/TrFE) copolymer thin films were prepared by physical vapor deposition, and dielectric properties with frequency were investigated. From results of TA(therma; analysis). the curie transition temperature and melting temperature were observed at 118.8℃ and 146℃, respectively. Therefore, while thin films were prepared, the substrate temperature was varied from 30℃ to 90℃. The dielectric constant decreased with increasing from 3.643 to 23.998 with increasing substrate temperature from 30℃ to 90℃. As a result of dielectric loss factor, α-relaxation and β-relaxation were observed near at 100Hz and 1MHz, respectively. And the magnitude of α-relaxation decreased and that of β-relaxation increased with increasing substrate temperature.