Abstract

New environmental-friendly lead-free barium calcium stannate titanate (BCTS)–Portland cement (PC) composites were studied and fabricated to be compatible with the concrete structures for sensors and smart-structure health-monitoring applications. The lead-free composites were produced by pressing and curing techniques. The effect and optimum of BCTS content on properties of composites were studied and compared with models. The acoustic impedances of composites within a range of 30 to 50% BCTS contents are optimal for an acoustic matching with concrete and give good compatibility with concrete structure. Scanning electron microscope images showed calcium silicate hydrate (the main hydration product of cement) at interfacial zone and cement matrix. The piezoelectric results indicate that the BCTS ceramics can improve the electromechanical coupling and piezoelectric properties in these composites. The piezoelectric coefficient measurements followed the cube model.

中文翻译：

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0–3连接性环保无铅BCTS-波特兰水泥复合材料的声学和压电特性

摘要

研究并制造了新型环保无铅锡酸钛酸钡钛酸钡（BCTS）-波特兰水泥（PC）复合材料，使其与用于传感器和智能结构健康监测应用的混凝土结构兼容。无铅复合材料是通过压制和固化技术生产的。研究了BCTS含量对复合材料性能的影响和最佳化，并与模型进行了比较。BCTS含量在30％到50％之间的复合材料的声阻抗最适合与混凝土进行声匹配，并与混凝土结构具有良好的相容性。扫描电子显微镜图像显示在界面区域和水泥基质上的水合硅酸钙（水泥的主要水合产物）。压电结果表明，BCTS陶瓷可以改善这些复合材料的机电耦合和压电性能。压电系数的测量遵循立方模型。