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中文摘要：
采用传统固相烧结工艺，结合特殊的气氛控制技术，制备了铌酸钾钠（KNN）基无铅透明陶瓷xBa（Sc0．5Nb0．5）03．（1-x）（K0．5N0．5）NbO3（简写xBSN-（1-x）KNN）．并对其微观结构、介电、铁电性能和光学透光率进行了研究．结果表明该体系陶瓷具有准立方钙钛矿结构，没有其他杂相，晶粒大小与可见光波长相当，高度致密，无明显的晶界存在．在x=0．05时，d33最高可达到110pC／N，2Pr达到25．4μC／cm2．同时该材料具有良好的透明性，在可见光范围内，透过率达到54％左右，近红外2500nm处，透过率接近83％，是一种有望取代铅基透明陶瓷的环境友好型无铅透明陶瓷．
英文摘要：
Using conventional solid-phase sintering technique combined with a special atmosphere controlling technique, KNN-based lead- free transparent ceramics, xBa（Sc0.5Nb0.5）O3-（1 - x） （K0.5N0.5）NbO3 （xBSN-（1 - x） KNN）, are prepared and investigated. Their microstructure, dielectric performance, ferroelectric performance and optical transparency are investigated. The results show that such ceramics are each with a pseudocubic-Perovskite structure, without any other impure phase. Their grain size is comparable to the light wavelength and the grains are highly condensed without evident crystal borders. For x = 0.05, the d33 reaches up to 110 pC/N maximally and the 2Px=25.4 μC/cm2. Moreover, such ceramics are each with an excellent transparency. Their optical transparency reaches about 54%, In the near-infrared wavelength 2500 nm, their optical transparency is near 83%. Such ceramics are a type of environment-friendly lead-free transparent ceramics which may be promising in replacing lead-based transparent ceramics.
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