【摘 要】
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Background, Motivation and Objective Recently, lead-based piezoelectric ceramics have been widely used because of their excellent electrical properties such as piezoelectric actuators, piezoelectric s
【机 构】
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Semyung university, Korea, Republic of Semyung un
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Background, Motivation and Objective Recently, lead-based piezoelectric ceramics have been widely used because of their excellent electrical properties such as piezoelectric actuators, piezoelectric sensors and transducers. However, PZT-based piezoelectric ceramic causes a serious problem for the environment and human health. Accordingly research on lead-free piezoelectric compositions has become more and more active in recent years. Lead-free piezoceramics have received considerable attention as a promising candidate for the PZT ceramics because of their high phase transition temperature and excellent electromechanical coupling factor(kp) properties. However, it is difficult to obtain the dense NKN ceramics because of high hygroscopic and the volatilization of the alkali element during their sintering process.
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