STRUCTURE,SITE OCCUPATIONS AND DIELECTRIC PROPERTIES OF LA AND TM CO-DOPED BATIO3 CERAMICS
The nominal(Ba1–xLax)(Ti1–xTmx)O3(x = 0.01-0.15)(BLTTm)ceramics were prepared at 1400 ℃using a mixed-oxides method.The structure,solubility limit,site occupations,and dielectric properties were investigated using Xray diffraction(XRD),Raman spectroscopy(RS),electron paramagnetic resonance(EPR),and dielectric measurements.The solubility limit of La/Tm in the BaTiO3 lattice was determined by XRD to be x = 0.08.BLTTm has a tetragonal perovskite structure for x ≤ 0.03 and a pseudo-cubic structure for 0.05 ≤ x ≤ 0.08.The dielectric thermal behavior of BLTTm with x = 0.05 satisfied X6T specification,with ε′RT = 1756 and a very low tan δ(<0.02)below 100 ℃.Tm3+ions in BLTTm exhibited an asymmetric amphoteric behavior.Both reduction in Mn impurities of Mn4+/Mn3+to Mn2+and creation of high-intensity Ti vacancies are responsible for the very low tan δ in BLTTm with x = 0.05.
La and Tm co-doped BaTiO3 ceramics site occupations X-ray diffraction dielectric properties electron paramagnetic resonance
Yue Liang Dayong Lu
Key Laboratory for Special Functional Materials in Jilin Provincial Universities,Jilin Institute of Key Laboratory for Special Functional Materials in Jilin Provincial Universities,Jilin Institute of
国际会议
吉林
英文
124-126
2018-06-23（万方平台首次上网日期，不代表论文的发表时间）