EFFECTS OF THERMAL ETCHING CONDITIONS ON SEM OBSERVATIONS OF TWO KINDS OF BaTiO3-BASED CERAMICS
The effects of thermal etching temperature(Tte)and time(tte)on scanning electron microscope(SEM)observations were investigated using X-ray diffraction(XRD),SEM,backscattered electron(BSE),and dielectric measurements for(Ba1-xMgx)TiO3(x = 0.015)(BMT)and BETC(not open)ceramics prepared at the sintering temperatures of Ts = 1200 ℃and 1400 ℃,respectively.BMT and BETC exhibit a pseudo-cubic and a tetragonal perovskite structures,respectively.When Tte> Ts,the crystalline structure,microstructure and dielectric thermal properties change,and at this time the observed SEM image cannot reflect the real morphology of BMT.The Tte should be equal to or less than Ts.An optimum condition for clear SEM observations of BETC was determined to be Tte = 1400 ℃for Tte = 18 min,and at this time,the crystalline structure and dielectric properties of BETC did not change.Under a given thermal etching temperature,the thermal etching time has a great influence on the SEM image quality of sample.
BaTiO3 ceramics scanning electron microscope microstructure X-ray diffraction dielectric properties
Yongshun Zheng Dayong Lu
Key Laboratory for Special Functional Materials in Jilin Provincial Universities,Jilin Institute of Chemical Technology Chengde Street 45,Jilin 132022,China
国际会议
吉林
英文
91-93
2018-06-23（万方平台首次上网日期，不代表论文的发表时间）