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New NTC thermistors based on LaCrO3–Mg(Al0.7Cr0.3)2O4 composite ceramics

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Abstract

In this study, the xLaCrO3–(1−x)Mg(Al0.7Cr0.3)2O4 (x = 0.1, 0.2, 0.3, 0.4) negative temperature coefficient composite ceramics were fabricated through conventional solid state reaction at 1650 °C. X-ray diffraction analysis has revealed that the sintered ceramics are consisted of cubic spinel Mg(Al0.7Cr0.3)2O4 phase and orthorhombic perovskite LaCrO3 phase. The obtained values of \({{\rho }_{\text{300}}}\) and \({{B}_{400/800}}\) and \({{E}_{\text{a}}}\) are in the range of 1.55 × 102–1.41 × 108 Ωcm, 756–11317 K, 0.065–0.976 eV, respectively. The electrical properties of these ceramics can be adjusted by the LaCrO3 contents. Such ceramics could be suitable for high temperature NTC thermistor application.

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Acknowledgements

This study was supported by the Innovation Fund of Chinese Academy of Sciences (Grant No. CXJJ-15M047), the National Natural Science Foundation of China (Grant No. 51502335), and the West Light Foundation of the Chinese Academy of Sciences (Grant No. 2015-XBQN-B-13).

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Authors and Affiliations

  1. Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi, 830011, China

    Tian Yang, Bo Zhang, Ping Luo, Qing Zhao, Donglin He & Aimin Chang

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Tian Yang

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  1. Tian Yang
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  2. Bo Zhang
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  3. Ping Luo
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  4. Qing Zhao
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  5. Donglin He
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  6. Aimin Chang
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Correspondence to Bo Zhang or Aimin Chang.

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Yang, T., Zhang, B., Luo, P. et al. New NTC thermistors based on LaCrO3–Mg(Al0.7Cr0.3)2O4 composite ceramics. J Mater Sci: Mater Electron 28, 7558–7561 (2017). https://doi.org/10.1007/s10854-017-6445-1

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  • DOI: https://doi.org/10.1007/s10854-017-6445-1

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