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• 作者：Haiwei Du (1) (2)
  Yanqiu Huang (1) (2)
  Huilin Li (1) (2)
  Hongping Tang (1) (2)
  Wei Feng (1) (2)
  
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2013
• 出版时间：March 2013
• 年：2013
• 卷：24
• 期：3
• 页码：855-860
• 全文大小：826KB
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• 作者单位：Haiwei Du (1) (2)
  Yanqiu Huang (1) (2)
  Huilin Li (1) (2)
  Hongping Tang (1) (2)
  Wei Feng (1) (2)
  
  1. Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, People’s Republic of China
  2. Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, 430074, People’s Republic of China
  
• ISSN：1573-482X

文摘

The (0.96-em class="a-plus-plus">x)K0.5Na0.5NbO3-.04LiTaO3-em class="a-plus-plus">xNaSbO3 (abbreviated as KNN–LT-em class="a-plus-plus">xNS, x?=?0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08) lead-free piezoelectric ceramics were fabricated by conventional ceramic technique. The crystal structure, dielectric, ferroelectric and piezoelectric properties of the ceramics were investigated. The Curie temperature (T C) and the polymorphic phase transition temperature (T O?T) of the ceramics decreased gradually with the increase of NaSbO3. In addition, a coexistence of orthorhombic and tetragonal phases in the ceramics was identified in the composition range of 0.05?≤?em class="a-plus-plus">x?≤?.08. The ceramic with a composition of x?=?0.06, which was close to the orthorhombic side of the polymorphic phase transition (PPT) region, exhibited excellent electrical properties with piezoelectric coefficient d 33?=?233 pC/N, planar electromechanical coupling coefficient k p?=?0.328, remnant polarization P r?=?14.7?μC/cm2, coercive field E c ?=?11.7?kV/cm, relative permittivity $ \varepsilon_{33}^{\text{T}} /\varepsilon_{0} $ ?=?1,033, and loss tangent tan δ?=?0.063. The ceramics had relatively low Q m value in the range of 10-7.