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• 作者：Jigong Hao ; Zhijun Xu ; Ruiqing Chu ; Wei Li…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：26
• 期：10
• 页码：7867-7872
• 全文大小：1,628 KB
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• 作者单位：Jigong Hao (1)
  Zhijun Xu (1)
  Ruiqing Chu (1)
  Wei Li (1)
  Juan Du (1)
  
  1. College of Materials Science and Engineering, Liaocheng University, Liaocheng, 252059, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X

文摘

The MTiO₃ (M = Ca, Sr, Ba, Bi_0.5Na_0.5, Bi_0.5K_0.5 and Bi_0.5Li_0.5)-modified (K_0.5Na_0.5)_0.94Li_0.06NbO₃ lead-free piezoelectric ceramics were prepared using normal sintering for improving the temperature stability and fatigue resistance of (K_0.5Na_0.5)NbO₃-based ceramics. Results showed that MTiO₃ substitution into (K_0.5Na_0.5)_0.94Li_0.06NbO₃ shifts the polymorphic phase transition below room temperature. The dominant crystal phase changes from coexistence of orthorhombic and tetragonal phase to tetragonal phase with the MTiO₃ addtion. Accordingly, the temperature stability and fatigue resistance of the modified ceramics were significantly improved. It was found that 1.0 mol% MTiO₃ (M = Ca)-modified (K_0.5Na_0.5)_0.94Li_0.06NbO₃ ceramics exhibited nearly temperature-independent properties (25-60 °C), fatigue-free behavior (up to 105 cycles) and good piezoelectric properties (d ₃₃ * = 245 pm/V), indicating these materials promising for actuator and transducers applications.