采用传统固相反应法制备了yBiYbO3-(0.36-y)BiScO3-0.64PbTiO3(BSYPT-0.64/y)体系压电陶瓷.X射线衍射显示BSYPT-0.64/y陶瓷体系为单一的钙钛矿结构；SEM测试结果显示当y=0.1时陶瓷表面形貌出现异常,当y=0.14时有大量粒径为0.3～0.5 μm的细小晶粒析出在陶瓷的表面；EDS能谱分析发现细小晶粒主要成分为Bi、Yb、Ti、Sc和O,表明BiYbO3的含量超过10％时为BSYPT-0.64/y陶瓷体系的固溶极限区域；通过BSYPT-0.64/y陶瓷的压电性能、铁电性能测试,介温特性(Tc～450℃)结果分析发现当y＞0.1时,BiYbO3固溶极限析出是相对孤立的行为,不是影响BSYPT-0.64/y的结构和电学性能的主要因素,而其结构和电学性能的降低依赖于Sc/Pb相对含量比的降低导致组分对准同型相界的偏离.
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