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)