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Author(s): |
Zhao-hu Li, School of Chemistry and Materials Science, Shaanxi Normal University, Xi’an, 710062, Shaanxi, P.R. China
Zu-pei Yang, School of Chemistry and Materials Science, Shaanxi Normal University, Xi’an, 710062, Shaanxi, P.R. China |
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Abstract: |
Sr2NaNb5O15—xLiSbO3 lead-free ceramics were prepared by conventional solid state method. The phase structure, microstructure, dielectric and ferroelectric properties of obtained ceramics with different LiSbO3 content were investigated X-ray diffraction patterns showed that pure tungsten bronze structure can be obtained for all samples. The density of Sr2NaNb5O15—xLiSbO3 ceramics increased initially, obtained the maximum of 4.9597g/cm3 at x = 0.04 and then decreased. It was also found that ? r, ? m, Pr, and Ec all increased at first and then decreased with increasing x. The optimized electrical properties were obtained at x = 0.04: ? r=1492，? m=2062，Pr=6.84μC/cm2，Ec=17.86 kV/cm，Tc=241, indicating that the ceramics with x = 0.04 are promising materials.
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