摘要
采用柠檬酸盐法制备了 Ｌａ０．９Ｓｒ０．１Ｇａ０．８Ｍｇ０．２Ｏ３－α（ＬＳＧＭ）粉体材料．ＴＧ和 ＤＴＡ分析表明，凝胶在２６５～３０９℃下分解为相应的氧化物．ＸＲＤ测试表明，凝胶在１３００℃以上煅烧时，转变为简单立方钙钛矿结构的纯相产物．１４５０℃下烧结体的相对密度为８８％，其复阻抗特性表明产物中没有明显的晶界过程，且在８００℃下的电导率为 ２.１×１０－２Ｓｃｍ－１，活化能为０．９８ｅＶ．
La0.9Sr0.1Ga0.8Mg0.2O3-a was prepared by a citrate method. Thermal analysis (TG/DTA) was used to characterize the thermal decomposition of the organic ligands of the gel. The gel decomposed to its oxides at 256-309℃. X-ray diffraction patterns indicate a pure primitive-cubic phase is formed by 1300℃ without impure phases. The impedance spectra of an 88%-dense sample exhibit no grain-boundary contribution, a conductivity σ=2.l×10-2Scm-1 at 800℃ and an activity energy E=0.98eV.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第2期358-362,共5页
Journal of Inorganic Materials
基金
国家自然科学基金资助课题!(59789201)
