质子辐照0.9PMN-0.1PT/P(VDF-TrFE) 0-3复合材料的研究

Proceedings of the 13th IEEE International Symposium on Applications of Ferroelectrics, 2002. ISAF 2002. Pub Date : 2002-05-28 DOI:10.1109/ISAF.2002.1195863

K. H. Lam, H. Chan, C. Choy, E. Luo, I. Wilson

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引用次数: 0

摘要

聚偏氟乙烯-三氟乙烯[P(VDF-TrFE) 70/30 mol%]共聚物经质子辐照后可由铁电性转变为弛豫材料。随着测量频率的降低，相变峰变宽并向较低温度方向移动。在本研究中，将0-9Pb(Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/-0.1PbTiO/sub 3/陶瓷粉末掺入P(VDF-TrFE) 70/30 mol%共聚物基体中制备了0-3复合材料。0.9PMN-0.1PT陶瓷是具有高介电常数的弛豫铁电体。结果表明，PMN-PT/P(VDF-TrFE) 0-3复合材料的相对介电常数随陶瓷体积分数的增加而增大。以0.9PMN-0.1PT体积分数为0.3和0.4的复合材料进行质子辐照。当质子用量为80 Mrad (4.76 /spl倍/ 10/sup 13/ ions/cm/sup 2/)时，0.4体积分数0-3复合材料的相对介电常数在室温(1 kHz)附近可达130。

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Studies of proton irradiated 0.9PMN-0.1PT/P(VDF-TrFE) 0-3 composites

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(Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/-0.1PbTiO/sub 3/ 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 /spl times/ 10/sup 13/ ions/cm/sup 2/) 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).

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来源期刊

Proceedings of the 13th IEEE International Symposium on Applications of Ferroelectrics, 2002. ISAF 2002.

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