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Origin of high mechanical quality factor in CuO-doped (K, Na)NbO3-based ceramics

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Abstract

The origin of a high mechanical quality in CuO-doped (K, Na)NbO3-based ceramics is addressed by considering the correlations between the lattice positions of Cu ions and the hardening effect in K0.48Na0.52 + xNbO3-0.01CuO ceramics. The Cu ions simultaneously occupy K/Na and Nb sites of these ceramics with x = 0 and 0.02, only occupy the K/Na site of the ceramics with x = −0.02, and mostly form a secondary phase of the ceramics with x = −0.05. The Cu ions lead to the hardening of ceramics with an increase of E C and Q m by only occupying the K/Na site, together with the formation of double hysteresis loops in un-poled compositions. A defect model is proposed to illuminate the origin of a high Q m value, that is, the domain stabilization is dominated by the content of relatively mobile O2− ions in the ceramics, which has a weak bonding with CuK/Na defects.

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Authors and Affiliations

  1. Department of Materials Science, Sichuan University, Chengdu, 610064, China

    Wen-Feng Liang, Ding-Quan Xiao, Jia-Gang Wu, Wen-Juan Wu & Jian-Guo Zhu

  2. CAEP Key Laboratory of Neutron Physics, Mianyang, 621900, China

    Wen-Feng Liang

  3. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China

    Wen-Feng Liang

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  1. Wen-Feng Liang
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  2. Ding-Quan Xiao
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  3. Jia-Gang Wu
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  4. Wen-Juan Wu
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  5. Jian-Guo Zhu
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Correspondence to Wen-Feng Liang or Ding-Quan Xiao.

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Liang, WF., Xiao, DQ., Wu, JG. et al. Origin of high mechanical quality factor in CuO-doped (K, Na)NbO3-based ceramics. Front. Mater. Sci. 8, 165–175 (2014). https://doi.org/10.1007/s11706-014-0245-9

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  • DOI: https://doi.org/10.1007/s11706-014-0245-9

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