摘要
以铌铁矿预产物法合成的铌镁酸铅-钛酸铅(PMN-PT)陶瓷粉体和聚二氟乙烯-三氟乙烯共聚物P(VDF-TrFE)为原料,采用流延法在ITO衬底上制备了不同质量配比的PMN-PT/P(VDF-TrFE)复合厚膜。采用XRD及SEM分别分析了PMN-PT粉体的物相结构和复合材料的界面特征。通过测试复合材料的介电-温度曲线,计算出加载在陶瓷相上的极化分压与温度的关系,得到优化的极化温度。与常规的分步极化相比,探讨了在优化极化条件下陶瓷相含量对复合材料热释电性能的影响,结果表明在极化温度为110℃,PMN-PT质量分数为55%时,得到了热释电系数为58.6μC/(m2·K)的热释电复合厚膜材料。
Lead magnesium niobate-lead titanate(PMN-PT)ceramic prepared by columbite precursor method and polyvinylidene fluoride-trifluoroethylene P(VDF-TrFE)have been used to fabricate 0-3composites thick films on ITO substrates by flow casting.The phase structure of PMN-PT was analyzed by XRD and the interface of 0-3composites was characterized by SEM.Variation of dielectric constant(εr)and electric field applied to the ceramic phase(Ec)with temperature were studied to optimize the polarization temperature.Furthermore,compared with the conventional polarization in stages,PMN-PT ceramic content effect on pyroelectric properties of composites was also discussed under optimized polarization condition.The results showed that the pyroelectric coefficient increases to 58.6μC/(m2·K)at a ceramic mass fraction of 55% by polarizing temperature with 110 ℃.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2015年第7期7048-7051,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51102037)
