Title :
Studies of proton irradiated 0.9PMN-0.1PT/P(VDF-TrFE) 0-3 composites
Author :
Lam, K.H. ; Chan, H.L.W. ; Choy, C.L. ; Luo, E.Z. ; Wilson, I.H.
Author_Institution :
Dept. of Appl. Phys., Hong Kong Polytech. Univ., Kowloon, China
fDate :
28 May-1 June 2002
Abstract :
Polyvinylidene fluoride-trifluoroethylene [P(VDF-TrFE) 70/30 mol%] copolymer can be transformed from a ferroelectric to a relaxor material after proton irradiation. The phase transition peak broadens and shifts towards lower temperature as the measurement frequency decreases. In the present study, 0-3 composites are fabricated by incorporating 0-9Pb(Mg13/Nb23/)O3-0.1PbTiO3 ceramic powder into a P(VDF-TrFE) 70/30 mol% copolymer matrix. 0.9PMN-0.1PT ceramic is a relaxor ferroelectric with high dielectric permittivity. It was found that the relative permittivity of PMN-PT/P(VDF-TrFE) 0-3 composite increases with increasing ceramic volume fraction. Composites with 0.3 and 0.4 volume fraction of 0.9PMN-0.1PT were subjected to proton irradiation. With a 80 Mrad (4.76 × 1013 ions/cm2) proton dosage, the relative permittivity of the 0.4 volume fraction 0-3 composites can go up to 130 near room temperature (at 1 kHz).
Keywords :
composite materials; ferroelectric ceramics; lead compounds; permittivity; polymer blends; proton effects; relaxor ferroelectrics; 1 kHz; PMN-PbTiO3; Pb(Mg13/Nb23/)O3-PbTiO3 ceramic powder; PbMgO3NbO3-PbTiO3; ceramic volume fraction; copolymer; ferroelectric; high dielectric permittivity; phase transition peak; polyvinylidene fluoride-trifluoroethylene; proton irradiated PMN-PT/P(VDF-TrFE) 0-3 composites; relaxor material; Ceramics; Ferroelectric materials; Frequency measurement; Niobium; Permittivity; Phase measurement; Powders; Protons; Relaxor ferroelectrics; Temperature measurement;
Conference_Titel :
Applications of Ferroelectrics, 2002. ISAF 2002. Proceedings of the 13th IEEE International Symposium on
Print_ISBN :
0-7803-7414-2
DOI :
10.1109/ISAF.2002.1195863
