Tao Chu, Xingchen He, Tao Li, Jun Deng, Cailin Wang, Juping Xu, Aigen Huang
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引用次数: 0
Abstract
Piezoelectric ceramics, as an essential electronic material, are widely used in various actuators and ultrasonic transducers. In this study, piezoceramics in the formula Pb0.94Sr0.04Ba0.02(Mg1/3Nb2/3)0.025(Sb1/2Nb1/2)0.025(Ni1/3Nb2/3)x(Zr0.48Ti0.52)0.95−xO3 + 0.2wt%Li2CO3, where x = 0.21 − 0.17(abbreviated as PMN-PSN-xPNN-(0.95-x)PZT) were investigated. By changing the PNN content from 0.21 to 0.17, high piezoelectric coefficient d33 from 860 pC/N to 700 pC/N, high Curie temperature Tc from 137 ℃ to 168 ℃ were obtained. All the ceramics show excellent electrical properties. It is 15 − 20% better than PNN-PZT or doped PNN-PZT piezoelectric ceramics in certain aspects. What’s more, the ceramics also carry extraordinary electromechanical coupling factor kp (from 67 to 73%). Hence, this is an excellent candidate for actuators and transducers applications.
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.