Dielectric and Piezoelectric Properties of (K0.48Na0.52)(Nb0.98Sb0.02)O3--BiScO3 Lead-Free Ceramics
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概要
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Lead-free ceramics (1-x)(K0.48Na0.52)(Nb0.98Sb0.02)O3--xBiScO3 + 0.8 mol % MnCO3 have been fabricated by conventional sintering technique. The results of X-ray diffraction suggest that all samples show pure perovskite structure and the structure changes from orthorhombic to tetragonal with the increase of BiScO3. At room temperature, the polymorphic phase transition (PPT) from orthorhombic to tetragonal phases was identified. With the increase in BiScO3 content, both the cubic--tetragonal and tetragonal--orthorhombic phase transitions shift to lower temperatures; hence, the dielectric and piezoelectric properties are significantly enhanced. As a result, the ceramic with x=0.015 exhibits the following optimum properties: d_{33}=265 pC/N, k_{\text{p}}=0.509, k_{\text{t}}=0.503, \varepsilon_{\text{r}} =1409, \tan \delta=0.034.
- 2011-12-25
著者
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Zhu Jianguo
Department Of Materials Science Sichuan University
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Zhu Bo
Department Of Biomolecular Engineering Tokyo Institute Of Technology
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Xiao Dingquan
Department Of Materials Science Sichuan University
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Liu Jing
Department Of Biomedical Engineering And Rehabilitation Medicine The Cleveland Clinic Foundation
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Zhu Xiaohong
Department Of Epidemiology School Of Public Health Medical College Of Soochow University
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Zhu Bo
Department of Materials Science, Sichuan University, Chengdu 610064, China
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Wang Mingsong
Department of Materials Science, Sichuan University, Chengdu 610064, China
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Zhu Jiliang
Department of Materials Science, Sichuan University, Chengdu 610064, China
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Li Xuhai
Department of Materials Science, Sichuan University, Chengdu 610064, China
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Sun Ping
Department of Materials Science, Sichuan University, Chengdu 610064, China
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Xiao Dingquan
Department of Materials Science, Sichuan University, Chengdu 610064, China
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Zhu Jianguo
Department of Materials Science, Sichuan University, Chengdu 610064, China
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