【摘要】 本工作用X射线衍射、热激放电、介电-温度特性、电荷-压力关系等实验方法研究了xNa_0.5Bi_0.6TiO₃-（1-x）K_0.5Bi_0.5TiO₃系（0.73≤x≤1.00）陶瓷固溶体的相变,首次确定了该系统的相图。发现该系统的固溶体,在铁电相和顺电相之间存在着一个较阔的过渡相相区,随着温度的升高,固溶体都依次经历铁电相-过渡相-顺电相相变。文中对过渡相的性质作了讨论。更多还原

【Abstract】 The phase transition of ceramic solid solutions of xNa_0.5Bi_0.5TiO₃-（1-x）K_0.5Bi_0.5TiO₃ system （0.73≤x≤1.00） has been investigated by means of X-ray diffraction, thermally stimulated discharge,temperature dependence of dielectric properties and released charge-pressure relationship ere.The phase diagram of the system was determined for the first time.It is found that there is a wide transitional phase region between ferroelectric phase and paraelectric phase, and that all the ceramic solid solutions successively undergo transformation from ferroelectric phase to transitional phase and then to pareelectric phase with the increase of temperature.The characteristics of transitional phase are discussed.更多还原