【摘要】 采用溶胶凝胶法制备了Ba(ZrxTi1-x)O3(X=0.04、0.07、0.10、0.13)亚微米粉体,XRD物相分析证明其为完全互溶取代固溶体粉末。该粉末可在1 340℃下烧结成瓷,对该系列固溶体材料的介电性能用LCR测量仪进行了测试分析,结果表明:材料的介电常数随Zr掺杂量的增多呈上升趋势,在X=0.10达到极值。材料的居里点温度随Zr掺杂量的增多向室温方向呈线性偏移。SEM分析表明,随Zr掺杂量的增多材料的晶粒尺寸有明显的降低,说明Zr掺杂对晶粒长大有抑制作用。更多还原

【Abstract】 Ba(Zr_xTi_1-x)O₃（X=0.04、0.07、0.10、0.13） powders were prepared by using the Sol-Gel process.X-ray diffraction analysis showed that the powders of the pure perovskite phase could be obtained after heating the gel powders for 2 h at 750 ℃.The Ba(Zr_xTi_1-x)O₃ ceramic was prepared at 1 340 ℃ which was much lower than the heating temperature 1 400 ℃ of the powders prepared by other Sol-Gel process.The dielectric properties analysis found that the higher Zr content leaded to a higher dielectric constant before x=0.10 of which the peak value was 12 491 at X=0.10 using LCR.At larger X,the permittivity maximum broadened,and continued to move to lower temperatures.The SEM pictures showed that the grain size decreased greatly with increasing Zr content,which was 200-800 nm at X=0.10.更多还原