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Synthesis of anisotropic NaNbO3 seed crystals and fabrication of textured (K0.5Na0.5)NbO3-based ceramics

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Abstract

High aspect ratio patelike NaNbO3 particles with pure perovskite structure have been successfully synthesized by topochemical microcrystal conversion (TMC) from plate-like precursor particles of the layer-structured Bi2.5Na3.5Nb5O18. By changing the Bi2.5Na3.5Nb5O18/Na2CO3 ratio, large and thin NaNbO3 particles with a thickness of approximately 0.5 μm and a width of approximately 20 μm were obtained. The obtained NaNbO3 particles is quite suitable for fabricating textured (K0.5Na0.5)NbO3-based ceramics. Using the fine platelike NaNbO3 particles as templates, dense <001> -oriented (K0.5Na0.5)NbO3-0.5 mol %MnO2 ceramics with high texture quality (Lotgering factor F 001 = 87 %) and excellent piezoelectric properties were produced by templated grain growth. Compared with randomly oriented ceramics, textured samples show greatly enhanced properties. The room-temperature strain S, the piezoelectric coefficient d *33 and d 33 reach up to 0.093 %, 233 pm/V and 195pC/N, respectively, which are all about 1.5 times larger than those of non-textured ceramics.

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Acknowledgments

This work was financially supported by the Research Foundation of Liaocheng University (No. 318051402).

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China

    Yuxia Kong & Dan Xu

  2. College of Materials Science and Engineering, Liaocheng University, Liaocheng, 252059, China

    Jigong Hao

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  1. Yuxia Kong
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  2. Jigong Hao
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  3. Dan Xu
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Correspondence to Yuxia Kong.

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Kong, Y., Hao, J. & Xu, D. Synthesis of anisotropic NaNbO3 seed crystals and fabrication of textured (K0.5Na0.5)NbO3-based ceramics. J Mater Sci: Mater Electron 27, 11256–11261 (2016). https://doi.org/10.1007/s10854-016-5246-2

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  • DOI: https://doi.org/10.1007/s10854-016-5246-2

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