Modifying Temperature Stability of (K,Na)NbO3\n Ceramics through Phase Boundary

(0.99-x)(K0.5Na0.5)(Nb0.965Sb0.035)O3-0.01SrZrO3-x(Bi0.5Na0.5)ZrO3 ceramics are chosen as an example to illustrate the effects of phase boundaries on strain. Temperature-dependent dielectric permittivity and convergent beam electron diffraction patterns confirm the multiphase coexistence of rhombohedral, orthorhombic, and tetragonal phases in the ceramics with x = 0.03–0.04. Intriguingly, the ceramics with x = 0.03 display improved temperature stability in strain, e.g., a high retention (≈95%) of unipolar strain at 180 °C and low variation of 24% at 20–180 °C. A mode is proposed to show how to effectively tailor the strain and consolidate its temperature stability in potassium sodium niobate-based ceramics.

Lv X, Wu J, Xiao D, Zhu J, Zhang J, et al. (2018) Modifying Temperature Stability of (K,Na)NbO3\n Ceramics through Phase Boundary. Advanced Electronic Materials: 1800205. Available:

The authors gratefully acknowledge the National Natural Science Foundation of China (NSFC Nos. 51722208 and 51332003) and the Graduate Student's Research and Innovation Fund of Sichuan University (Nos. 2012017yjsy111, 2018YJSY009 and 2018YJSY071) and the Key Technologies Research and Development Program of Sichuan Province (No. 2018JY0007). The authors thank for the help with the measurement of electrical properties from Prof. Jürgen Rödel's group (Technische Universität Darmstadt, Germany). The authors thank Mrs. Hui Wang (Analytical & Testing Center of Sichuan University) for measuring FE-SEM images.


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