【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。更多还原

【Abstract】 The 0.8BaTiO₃-0.2BiYO₃ ceramics with alkali-free glass modified were prepared by conventional solid-state method.The effect of the alkali-free glass content on the microstructure and dielectric properties of 0.8BaTiO₃-0.2BiYO₃ ceramics were studied.The mass percentage of glass was x=0,0.01,0.03,0.05 and 0.07 respectively.The results showed that the sintering temperature was reduced after being alkali-free glass modified and 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 ferroelectric property was enhanced after the ceramic was alkali-free glass modified.When the doped amount of glass was less than 3%,the polarization intensity was increased.The polarization intensity was biggest when the doped amount of glass was 3%.更多还原