New binary (1 − x)Ba(Lu1/2Nb1/2)O3-xPbTiO3 solid solution with morphotropic phase boundary |
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| Authors: | Dongquan Shen Xiuzhi LiZujian Wang Ying LiuChao He Tao LiXifa Long |
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| Affiliation: | a Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou 350002, China
b Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A new ferroelectric solid solution of (1 − x)Ba(Lu1/2Nb1/2)O3-xPbTiO3 (BLN-PT) (0 ≤ x ≤ 1) has been synthesized by solid state reactions. Its structure and electric properties have been studied by X-ray diffraction and di-/ferro-electric measurements. Based on the investigation, a partial solid state phase diagram of the binary BLN-PT ceramics system has been established, which exhibits a morphotropic phase boundary (MPB) region in the composition range of 0.64 ≤ x ≤ 0.68. The Curie temperature is measured to be around 250 °C in the vicinity of the MPB region, which is much higher than that of PMNT or PZNT system. The dielectric behavior has been discussed based on Curie-Weiss Law and Lorentz-type quadratic relationship. With increasing PT content, a transformation from relaxor to ferroelectric phase has been demonstrated in the solid solution system. |
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| Keywords: | (1 &minus x)Ba(Lu1/2Nb1/2)O3-xPbTiO3 solid solution Morphotropic phase boundary Dielectric, piezoelectric and ferroelectric properties |
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