Study of structural and dielectric properties of Ba0.6Sr0.4(ZrxTi1-x)O3 ceramic
BaxSr1-xTiO3 (BST), 0≤x≤1 is a solid solution ferroelectric material exhibiting a large dielectric constant non-linear change with an applied DC electric field. And Ba(ZrxTi1-x)O3 solid solution also has received much attention because of the good tunbality. In this paper, Ba0.6Sr0.4(ZrxTi1-x)O3 (x=0.15,0.20,0.25,0.30,) ceramic was obtained by traditional ceramic processing. The structural, surface morphological, dielectric properties, tunable properties of this material as well as the mechanism of their nonlinear dielectric constant under DC electric field were systematically examined. The Zr ions substitution of Ti ions has a strong effect on the grain sizes and the dielectric property. The results show that Ba0.6Sr0.4(ZrxTi1-x)O3 (x = 0.2, 0.25,0.3) ceramic is a promising candidate for the DC electric field tunable materials for microwave electronics application, because they exhibit high relative tunability (44％, 48％, 35％, respectively) as the strength of electric field is up to 1.5 kV/mm, and low dielectric loss (0.0026, 0.00044, 0.0015, respectively) at 100 kHz at room temperature. X-ray diffraction analyses indicated that the samples present perovskite phase. Scanning electron microscopy micrograph of sample indicated that the grain size decreased and density increased with Zr concentration increasing.
BST BZT Tunablilty
Xilin Wang Yuzhen Zhao Shanshan Liu Heping Zhou
State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science andEnginee State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engine
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
402-406
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）