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Pyroelectric Properties of Highly Ordered Pb(Sc0.5Ta0.5)O3 Ceramics by a Two-Step Sintering Technique

Authors

  • Wei Liu,

    1. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
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  • Genshui Wang,

    1. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
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  • Sheng Cao,

    1. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
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  • Chaoliang Mao,

    1. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
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  • Chunhua Yao,

    1. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
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  • Fei Cao,

    1. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
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  • Xianlin Dong

    Corresponding author
    1. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
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  • R. Whatmore—contributing editor

  • This work was financially supported by the Advance Research Project of Chinese Academy of Sciences (No. CXJJ-09-M54), Shanghai Rising-Star Program (09QH1402400), the “Hundred Talents Programme” Research Funding of Chinese Academic of Science, Basic Research Project of Shanghai (10DJ1400203), and Joint Funds of National Natural Science Foundation of China (Grant No. U0937603).

†Author to whom correspondence should be addressed. e-mail: xldong@sunm.shcnc.ac.cn

Abstract

Dense Pb(Sc0.5Ta0.5)O3 (PST) ceramics were fabricated by a two-step sintering technique. X-ray diffraction analysis showed that the order of degree is 0.91 and micrograph indicated that the grain size is 1–3 μm. Under dc bias of 700 V/mm, the detective figure of merit reaches over 70 × 10−5 Pa−1/2, where the pyroelectric coefficient, dielectric constant, and dielectric loss are 650 × 10−8 C·(cm2·K)−1, 6600, and 0.019, respectively. Such superior pyroelectric properties and fine grain size give it a particular advantage in application for uncooled focal plane array detectors.

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