摘要
采用固相反应法制备Bi1.5-xCaxZnNb1.5O7(0≤x≤0.50,BCZN)陶瓷,研究Ca2+替代Bi3+对Bi1.5ZnNb1.5O7陶瓷烧结特性、显微结构、介电性能和结晶化学特性的影响.结果表明:替代量x≤0.25 mol时,样品为单一的α-BZN相.随着Ca2+替代量增加,样品最佳烧结温度从1000℃升高到1020℃;致密度从7.011 g/cm3减小到6.353 g/cm3;样品晶粒尺寸、晶格常数、电阻率均减小;结晶化学参数键价和,AV(O')[Bi4]、AV(O')[Bi3Zn]、AV(O')[Bi2Zn2]和AV(O')[Ca3Zn]均增大,且该行为与其晶格常数、介电性能变化相吻合.
Bi1.5-xCaxZnNb1.5O7（0≤x≤0.50, BCZN） ceramics were prepared by solid phase reaction. The effects of Ca2＋ substituting Bi3＋ on the sintering properties, microstructure, dielectric and crystal chemistry properties of BiLsZnNbl.507 based ceramics were investigated. The results revealed that when x≤0.25 tool, crystal structure of Bi1.5-xCaxZnNb1.5O7 ceramics via X-ray diffraction（XRD） was pure α-BZN phase. With the amount of Ca2＋ ion in- creasing, the sintering temperature increased from 1000℃ to 1020℃, the density decreased from 7.011 g/cm^3 to 6.353 g/cm^3; and the grain size, lattice constant, resistivity all gradually decreased. For the crystal chemistry pa- rameters, with the amount of Ca2＋ ion increasing, AV（O＇）[Bi4], AV（O＇）[Bi3Zn], AV（O＇）[Bi2Zn2], AV（O＇）[Ca3Zn] all gradually increased, which coincided with the changes of lattice constant and dielectric properties.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第11期1164-1168,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(11074203)
研究生创新基金(Ycjj201152)~~
