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Positron annihilation spectrum study in non-ferroelectric piezoelectricity SrTiO3-Bi12TiO20 (ST-BT) composite ceramics

Zhang Li-Juan Wang Li-Hai Liu Jian-Dang Li Qiang Cheng Bin Zhang Jie An Ran Zhao Ming-Lei Ye Bang-Jiao

Positron annihilation spectrum study in non-ferroelectric piezoelectricity SrTiO3-Bi12TiO20 (ST-BT) composite ceramics

Zhang Li-Juan, Wang Li-Hai, Liu Jian-Dang, Li Qiang, Cheng Bin, Zhang Jie, An Ran, Zhao Ming-Lei, Ye Bang-Jiao
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  • Received Date:  05 June 2012
  • Accepted Date:  30 June 2012
  • Published Online:  05 December 2012

Positron annihilation spectrum study in non-ferroelectric piezoelectricity SrTiO3-Bi12TiO20 (ST-BT) composite ceramics

  • 1. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;
  • 2. School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
Fund Project:  Project supported by the Key Program of the National Natural Science Foundation of China (Grant No. 10835006), the National Natural Science Foundation of China (Grant No. 51172129), and the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 11105139).

Abstract: The positron annihilation lifetime spectroscopy, combined with X-ray diffraction and scanning electron microscopy is used to measure a new type of non-ferroelectric piezoelectricity SrTiO3-Bi12TiO20 (ST-BT) composite ceramic, which is prepared by conventional solid-state reaction in Shandong University. The structural characteristics and sinter process for ST-BT composite ceramic are systematically studied. A large number of crystal defects are observed in ST-BT composite ceramic with the sintering temperature being between 860 to 940 ℃. The large scale defects are formed due to the Bi12TiO20 phase decomposed when the sintering temperature rises to 980 ℃. The experimental results indicate that the structural characteristic and piezoelectricity of ST-BT composite ceramic shows good stability with the sintering temperature being between 920 to 940 ℃.

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