ABSTRACT The lead-free piezoelectric ceramic-cement composites made from bismuth sodium titanate-bismuth potassium titanate-barium titanate (BNBK) ceramic particle and Portland cement (PC) are developed for smart structure applications. The acoustic and dielectric properties of composites were investigated. The 30–60 vol% gave the optimal BNBK content for an acoustic impedance match between 0–3 connectivity BNBK-PC composites and structure materials, i.e. concrete. Parallel, cube and series models were also compared to the dielectric measurement results and the experimental values were found to fit closest to that of the cube model. The dielectric properties of composites were also found to depend on the frequency tested.

中文翻译：

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0-3铋钛酸钠-钛酸铋钾-钛酸钡/水泥复合材料的声学和介电性能

摘要 由钛酸钠铋-钛酸铋钾-钛酸钡 (BNBK) 陶瓷颗粒和波特兰水泥 (PC) 制成的无铅压电陶瓷-水泥复合材料是为智能结构应用而开发的。研究了复合材料的声学和介电性能。30–60 vol% 为 0–3 连通性 BNBK-PC 复合材料和结构材料（即混凝土）之间的声阻抗匹配提供了最佳 BNBK 含量。并联、立方体和串联模型也与介电测量结果进行了比较，发现实验值最接近立方体模型的值。还发现复合材料的介电特性取决于测试的频率。