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Dielectric and Impedance Studies on (K0.5Na0.5)NbO3-Based Ceramics

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Advances in Materials Processing (CMC 2017)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

Polycrystalline, lead-free (K0.5Na0.5)NbO3-based ceramics were synthesized using solid-state reaction method. The microstructure, dielectric and impedance characteristics of the ceramics were studied. The results showed that the obtained doped ceramic had a pure perovskite structure with pseudo-cubic phase. Some dielectric anomalies were observed at about 200 °C, and 500 °C for the ceramics, respectively. With the increase of BaBiO3 doping content, the dielectric constant-temperature transition peak value became weaker. The activation energy of conductivity is found to be closely related to the frequency. The activation energy obtained from the dielectric relaxation data was attributed to oxygen vacancies. The calculated activation energies at 10 kHz for the temperature range (200–500 °C) and (200–350 °C) and (350–500 °C) are 0.657, 0.542 and 0.350 eV, respectively.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China

    Yafei Yan, Minhong Jiang, Jiageng Song, Chongyan Hao, Qi Jin, Shengnan Han, Lin Li, Jinwei Zhang & Xiaoyu Yao

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  1. Yafei Yan
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  2. Minhong Jiang
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Correspondence to Minhong Jiang .

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  1. Chinese Materials Research Society, Beijing, China

    Yafang Han

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Yan, Y. et al. (2018). Dielectric and Impedance Studies on (K0.5Na0.5)NbO3-Based Ceramics. In: Han, Y. (eds) Advances in Materials Processing. CMC 2017. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-0107-0_57

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  • DOI: https://doi.org/10.1007/978-981-13-0107-0_57

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-13-0106-3

  • Online ISBN: 978-981-13-0107-0

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