18 May 2017 Evolution of piezoelectric response in (1-x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics
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Dense (1−x)KNbO3-x(Ba1/2Bi1/2)(Zn1/2Nb1/2)O3 (0 ≤ x ≤ 0.25) ceramics were prepared by the solid state reaction method. X-ray diffraction data show the average crystal structure to evolve from orthorhombic at x = 0 to pseudocubic at x = 0.25. Raman spectroscopy suggests the absence of polar order for x ≥ 0.25 ceramics. Polarisation versus electrical field measurements show a continuous decrease in the spontaneous polarisation with increasing x. Electrical-field-induced strain measurements reveal a piezoelectric-to-electrostrictive crossover. An electrostriction coefficient of 0.043 m4/C2 was measured for x = 0.15.
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Cristina Pascual-Gonzalez, Cristina Pascual-Gonzalez, Iasmi Sterianou, Iasmi Sterianou, Antonio Feteira, Antonio Feteira, } "Evolution of piezoelectric response in (1-x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics", Proc. SPIE 10194, Micro- and Nanotechnology Sensors, Systems, and Applications IX, 1019430 (18 May 2017); doi: 10.1117/12.2262811; https://doi.org/10.1117/12.2262811

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