梯度钛酸锶钡（BaxSr1-xTiO3）材料性能的研究

Study on the properties of gradient ceramic BST

采用固相法合成BaxSr1-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。

Ferroelectric ceramics BaxSr1-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.