【作者】 朱杰； 骆亚娟； 孙大志； 朱玉丹； 金雪琴；

【Author】 ZHU Jie LUO Ya-juan SUN Da-zhi ZHU Yu-dan JIN Xue-qin (College of Leife and Environmental Science,Shanghai Normal University,Shanghai 200234,China)

【机构】 上海师范大学生命与环境科学学院化学系；

【摘要】 采用固相法合成 Ba_xSr_1-xTiO₃（x=0,0．98,0．95, 0．90）单组分和多组分陶瓷,阻抗分析仪测量钛酸锶钡陶瓷25～130℃的介电温谱,对两者的介电特性进行了比较和研究．单组分样品在相变处介电常数出现峰值, 而通过热扩散形成的梯度铁电陶瓷能拓宽相变区域,在较宽的温度范围内获得较高的介电常数．使用 EPMA 电子探针表征梯度材料中元素的分布情况．更多还原

【Abstract】 Ferroelectric ceramics Ba_xSr_1-xTiO₃,single component functionally gradient ceramics BST were prepared by solid sintered.Impedance analysis machine measures dieclectric constant of BST in range of 25-130℃ Dielectric property in these two systems were compared and studied.Functionally gradient ceramics BST prepared by thermal diffusion possesses relatively large and stable dielectric constant within a large temperature range because of the wide phase transformation temperature range and EPMA electric gun scans material.In attribute gradient material element distributed situation更多还原