EFFECT OF SINTERING TEMPERATURE AND TIME ON STRUCTURAL AND DIELECTRIC PROPERTIES OF TB-DOPED BATIO3 CERAMICS
Ba1-x/2Ti1-x/2TbxO3(x = 0.05)ceramics(BTTb5)were prepared at Ts = 1400 ℃ for t = 6-24 h and at Ts = 1300-1480 ℃ for t = 24 h using the cold-pressing ceramic processing technique.All of BTTb5 ceramics satisfy EIA X5R dielectric specification and exhibit a tetragonal perovskite structure.The sintering temperature and the sintering time have little influence on the crystal structure and dielectric properties of BTTb5.The optimum preparation condition of BTTb5 is determined as Ts = 1400 ℃ for t = 12 h because of higher relative density(ρr = 94%)and lower dielectric loss(tan δ = 0.0108).As the sintering time increases,the XRD and EPR results reveal that more B-site Tb4+ions are reduced to A-site Tb3+.The higher sintering temperature is apt to ceramic densification and the incorporation of more Tb4+ions into B-sites.
Tb-doped BaTiO3 ceramics X-ray diffraction mixed-valent state dielectric properties electron paramagnetic resonance
Dayong Lu Xianglu Gao Yuchun Fu
Key Laboratory for Special Functional Materials in Jilin Provincial Universities,Jilin Institute of Department of Materials Chemistry,Jilin Institute of Chemical Technology Chengde Street 45,Jilin 132
国际会议
吉林
英文
79-82
2018-06-23（万方平台首次上网日期，不代表论文的发表时间）