[1]郑颖平,高文君,查燕,等.聚丙烯酰胺溶胶凝胶法合成La0.9Sr0.1Ga0.8Mg0.2O3-δ中温固体电解质及其性能[J].东南大学学报(自然科学版),2008,38(5):902-906.[doi:10.3969/j.issn.1001-0505.2008.05.031]
 Zheng Yingping,Gao Wenjun,Zha Yan,et al.Synthesis and properties of intermediate-temperature solid electrolyte La0.9Sr0.1Ga0.8Mg0.2O3-δ from polyacrylamide sol-gel precursor[J].Journal of Southeast University (Natural Science Edition),2008,38(5):902-906.[doi:10.3969/j.issn.1001-0505.2008.05.031]
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聚丙烯酰胺溶胶凝胶法合成La0.9Sr0.1Ga0.8Mg0.2O3-δ中温固体电解质及其性能()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第5期
页码:
902-906
栏目:
化学化工
出版日期:
2008-09-20

文章信息/Info

Title:
Synthesis and properties of intermediate-temperature solid electrolyte La0.9Sr0.1Ga0.8Mg0.2O3-δ from polyacrylamide sol-gel precursor
作者:
郑颖平 高文君 查燕 孙岳明
东南大学化学化工学院, 南京 211189
Author(s):
Zheng Yingping Gao Wenjun Zha Yan Sun Yueming
School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
关键词:
聚丙烯酰胺 固体电解质 掺杂镓酸镧
Keywords:
polyacrylamide solid electrolyte doped lanthanum gallate
分类号:
O642.5;TM911.4
DOI:
10.3969/j.issn.1001-0505.2008.05.031
摘要:
采用聚丙烯酰胺溶胶凝胶法制备了具有钙钛矿结构的中温固体电解质La0.9Sr0.1Ga0.8Mg0.2O3-δ(LSGM)粉体材料.TG-DSC 分析表明,凝胶在 250 ℃附近发生强烈的氧化反应.XRD 测试表明,凝胶在1 400 ℃烧结6 h,可以完全转变为稳定的钙钛矿相,经1 000 ℃烧结所得粉体的颗粒尺寸平均为 200~300 nm.1 450 ℃时烧结体的相对密度达到98%,平均粒径为 3~10 μm.该样品在800 ℃时的电导率为 7.5×10-2 S/cm,活化能为37.4 kJ/mol.研究结果表明用聚丙烯酰胺溶胶凝胶法合成LSGM 粉体有利于提高纯度,改善导电性能.
Abstract:
Perovskite-type structure La0.9Sr0.1Ga0.8Mg0.2O3-δ(LSGM)as intermediate-temperature electrolyte was prepared by polyacrylamide sol-gel method. It was found that the decomposition of the gel took place at 250 ℃, but the well-crystallized LSGM of perovskite phase was formed only after sintering at 1 400 ℃ for 6 h. Transmission electron microscope shows that the particle size of the powder ranges between 200 and 300 nm at 1 000 ℃. When the LSGM sample was sintered at 1 450 ℃, its relative density can reach to 98%, the average grain size ranges between 3 to 10 μm, its conductivity is 7.5×10-2 S/cm at 800 ℃ and its activation energy is 37.4 kJ/mol. The results reveal that the present polyacrylamide sol-gel method of synthesizing LSGM is advantageous to enhance purity and improve electrical property of the material.

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备注/Memo

备注/Memo:
作者简介: 郑颖平(1972—),女,博士生; 孙岳明(联系人),男,博士,教授,博士生导师,sun@seu.edu.cn.
基金项目: 江苏省高技术研究基金资助项目(BG2006033).
引文格式: 郑颖平,高文君,查燕,等.聚丙烯酰胺溶胶凝胶法合成La0.9Sr0.1Ga0.8Mg0.2O3-δ中温固体电解质及其性能[J].东南大学学报:自然科学版,2008,38(5):902-906.
更新日期/Last Update: 2008-09-20