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中文摘要：
采用传统固相烧结工艺，注重烧结时的气氛控制，制备了铌酸钾钠（KNN）基无铅透明陶瓷xBa（Sc0.5Nb0.5）O3-（1-x）（K0.5N0.5）NbO3。并对其相结钩、微观结构、压电性能和透光率进行了研究。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。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47％左右，近红外2500nm处，透过率接近70％，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 control-ling technique, KNN-based lead-free transparent ceramics, x Ba（Sc0.5 Nb0.5）O3-（1-x） （K0.5N0.5）NbO3 （xBSN-（1-x） KNN in simplified form）, are prepared and investigated. The XRD, micro-structure, die-lectric performance and optical transparency are investigated. The results show that such ceramics are of pseudocubic-Perovskite structure without any other impure phase. The grain size is comparable to the light wavelength and the grains are highly condensed without evident crystal borders. When x=0.05, d33 can reach up to 110 pC/N maximally. Such ceramics are of excellent transparency and the optical transparency reaches about 47 % in the visible light range,and the optical transparency is near 70 % at the near-infrared wavelength 2 500 nm. Such ceramics are a type of environment-friendly lead-free transparent ceramics which is promising in replacing lead-based transoarent ceramics.
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