La0.9Sr0.1Ga0.8Mg0.2O3-α的柠檬酸盐法制备和表征

无机材料学报, 2001, 16(2): 358-362.

La_0.9Sr_0.1Ga_0.8Mg_0.2O_3-α的柠檬酸盐法制备和表征

郑文君 , 武丽艳 , 彭定坤 , 孟广耀

1.1. 南开大学化学系, 天津 300071

2. 2. 中国科学技术大学材料科学与工程系, 合肥 230026

1.1. Department of Chemistry

Nankai University

Tianjin 300071

China

2. 2. Department of Materials Science and Engineering

University of Science and Technology of China

China

关键词：柠檬酸盐法 , oxide-ion conductor , LSGM

Preparation and Characterization of La_0.9Sr_0.1Ga_0.8Mg_0.2O_3-α by Citrate Method

ZHENG Wen-Jun , WU Li-Yan , PENG Ding-Kun , MENG Guang-Yao

Keywords： citrate method , 氧离子导体 , LSGM

采用柠檬酸盐法制备了　Ｌａ_０．９Ｓｒ_０．１Ｇａ_０．８Ｍｇ_０．２Ｏ_３－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．

La_0.9Sr_0.1Ga_0.8Mg_0.2O_3-αwas 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.

参考文献

[1]

Riley B. J. Power Sources, 1990, 29: 223--228.
[2] Minh N Q. J. Am. Ceram. Soc., 1993, 76 (3): 563--576.
[3] Sato T, Shimada. J. Am. Ceram. Soc., 1984, 67 (10): 212--214.
[4] Nlasov A, Perfilier M V. Solid State Ionics, 1987, 25: 245--254.
[5] Ishihara T, Matsuda H, Takita Y. J. Am. Chem. Soc., 1994, 116: 3801--3806.
[6] Feng M, Goodenough J B. Eur. J. Solid State Inorg. Chem., 1994, 731: 663--670.
[7] Huang K, Feng M, Goodenough J B. J. Am. Ceram. Soc., 1996, 79 (4): 1100--1105.
[8] Ishihara T. 第97次香山科学会议. 北京, 1998年6月. 67--75.
[9] Ishihara T, Matsuda H, Takita Y. J. Am. Chem. Soc., 1994, 116: 3801--3808.

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