中文摘要：

采用传统固相法制备Ba-B-Al-Si无碱玻璃改性0.8BaTiO3-0.2BiYO3（0.8BT-0.2BiY）的介电陶瓷。研究了无碱玻璃含量对0.8BT-0.2BiY陶瓷微结构和介电性能的影响,无碱玻璃的质量分数分别为x=0,0.01,0.03,0.05,0.07。研究结果表明,玻璃改性后的陶瓷,烧结温度降低,X线衍射（XRD）图谱中均出现第二相,主晶相均仍维持钛酸钡钙钛矿伪立方结构,掺杂玻璃组分的质量分数为3%时,第二相的衍射峰的强度最弱。陶瓷经无碱玻璃改性后,介电常数均减小,居里峰展宽效应减弱,铁电性增强。在玻璃的质量分数低于3%时,极化强度增大,在玻璃的质量分数为3%时最大。

英文摘要：

The 0. 8BaTiO3-0. 2BiYO3 ceramics with alkali-free glass modified were prepared by conventional solid-state method. The effect of the alkaii-free glass content on the microstructure and dielectric properties of0. 8BaTiO3-0. 2BiYO3 ceramics were studied. The mass percentage of glass was x= 0,0. 0 1,0. 0 3,0. 05 and 0. 07respectively. The results showed that the sintering temperature was reduced after being alkaii-free glass modifiedand the second phase appeared in XRD mapping. The pseudo-cubic perovskite structure was remained in main phase. The diffraction peak intensity of the second phase was the weakest at ceramics with 3 % of mass fraction of doped glass. The dielectric constant was reduced,the curie peak broadening effect was weakened and the ferroelec-tric property was enhanced after the ceramic was alkaii-free glass modified. When the doped amount of glass wasless than 3 %, the polarization intensity was increased. The polarization intensity was biggest when the dopedamount of glass was 3%.