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引用次数: 1
摘要
为满足混凝土结构健康监测的需要，研制了1-3连通性环氧树脂改性水泥基压电复合材料。讨论了压电陶瓷体积分数对复合材料的压电、介电和机电耦合性能的影响。结果表明:随着PZT压电陶瓷体积分数的增加，压电复合材料的相对介电常数呈线性增加，但介电损耗略大于PZT陶瓷;压电复合材料的压电应变常数d33主要由PZT陶瓷贡献，且与PZT体积分数成正比，而压电电压常数\({g}_{33}\)则呈现相反的变化。当PZT体积分数降至27.7时%, \({g}_{33}\) value of the piezoelectric composites reaches to 75.0 (mV)·m·N−1. When PZT ceramic volume fraction is 62.33%, the thickness electromechanical coupling coefficient kt of the piezoelectric composites is the largest of 66.73%. The acoustic impedance Z of the piezoelectric composite is close to that of the concrete when PZT ceramic volume fraction is less than 44.44%.
Fabrication and properties of 1–3 connectivity epoxy resin modified cement based piezoelectric composite
The 1–3 connectivity epoxy resin modified cement based piezoelectric composites were developed to meet the requirement of concrete structural heath monitoring. The piezoelectric ceramic volume fraction on piezoelectric, dielectric and electromechanical coupling properties of the composites were discussed. The results showed that the relative permittivity of the piezoelectric composites increases linearly with increasing the PZT piezoelectric ceramic volume fraction, but the dielectric loss of the piezoelectric composites is a little bit larger than that of the PZT ceramic. The piezoelectric strain constant d33 of the piezoelectric composites is mainly contributed by PZT ceramic and is in proportion to PZT volume fraction, however, the piezoelectric voltage constant \({g}_{33}\) show the opposite variation. When PZT volume fraction decreases to 27.7%, \({g}_{33}\) value of the piezoelectric composites reaches to 75.0 (mV)·m·N−1. When PZT ceramic volume fraction is 62.33%, the thickness electromechanical coupling coefficient kt of the piezoelectric composites is the largest of 66.73%. The acoustic impedance Z of the piezoelectric composite is close to that of the concrete when PZT ceramic volume fraction is less than 44.44%.
期刊介绍：
While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including:
-insulating to metallic and fast ion conductivity
-piezo-, ferro-, and pyro-electricity
-electro- and nonlinear optical properties
-feromagnetism.
When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice.
The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.
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