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[1]殷仕龙,叶祝鹏,李传明,等.熔盐法合成中温SOFC电解质La9.33Si6O26及其性能[J].南京工业大学学报(自然科学版),2013,35(06):1-4.[doi:10.3969/j.issn.1671-7627.2013.06.001]
 YIN Shilong,YE Zhupeng,LI Chuanming,et al.Molten-salt synthesis and characterization of La9.33Si6O26 intermediate temperature electrolyte for SOFC[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2013,35(06):1-4.[doi:10.3969/j.issn.1671-7627.2013.06.001]
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熔盐法合成中温SOFC电解质La9.33Si6O26及其性能()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
35
期数:
2013年06期
页码:
1-4
栏目:
出版日期:
2013-11-20

文章信息/Info

Title:
Molten-salt synthesis and characterization of La9.33Si6O26 intermediate temperature electrolyte for SOFC
文章编号:
1671-7627(2013)06-0001-04
作者:
殷仕龙叶祝鹏李传明陈小卫曾燕伟
南京工业大学 材料科学与工程学院 材料化学工程国家重点实验室, 江苏 南京 210009
Author(s):
YIN Shilong YE Zhupeng LI Chuanming CHEN Xiaowei ZENG Yanwei
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China
关键词:
La9.33Si6O26电解质 超细粉体 熔盐法 电导率
Keywords:
La9.33Si6O26 electrolyte ultrafine powder molten salt method conductivity
分类号:
O482;O614
DOI:
10.3969/j.issn.1671-7627.2013.06.001
文献标志码:
A
摘要:
用SiO2和La2O3作为原料,KCl为熔盐,合成中温固体氧化物燃料电池电解质La9.33Si6O26粉体。通过X线衍射仪(XRD)和场发射扫描电子显微镜(FESEM)等分析方法对合成粉体进行物相测定和形貌观察,在不同温度下考察粉体的烧结性能,利用交流阻抗对电解质的电性能进行测试。结果表明:通过工艺参数的设计,利用熔盐法在900 ℃成功合成了平均粒径为120 nm的单相La9.33Si6O26超细粉体,1 450 ℃烧结4 h后,La9.33Si6O26电解质的相对致密度达到92.7%,此烧结温度比传统固相法降低了250 ℃,烧结体在750 ℃的电导率为4.14×10-4 S/cm,电导活化能为0.83 eV。
Abstract:
Single-phase and ultrafine La9.33Si6O26 powders were synthesized by molten salt method using silicon dioxide and lanthanum oxide as reactants, potassium chloride as flux. X-ray diffraction(XRD)and field emission scanning electron microscopy(FESEM)were employed for the phase identification and morphological observations of the obtained powders. The sintering performance of the powders was studied and the ionic conductivity of the sintered sample was measured by AC impedance method. Results showed that single-phase La9.33Si6O26 powders with average particle size of 120 nm could be successfully synthesized at 900 ℃. These ultrafine powders possessed high sintering activities and their pressed pellets fired in 4 h had an apparent density equal to 92.7% of the theoretical values at 1 450 ℃, indicating at least 250 ℃ lower than that for the powders obtained by solid state reactions. The La9.33Si6O26 electrolyte was found to have an oxide ion conductivity of 4.14×10-4 S/cm at 750 ℃ with an activation energy of 0.83 eV.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2013-03-15
基金项目:江苏省普通高校研究生科研创新计划(CXZZ11_0331); 长江学者和创新团队发展计划(IRT1146)
作者简介:殷仕龙(1986—),男,江苏宿迁人,博士,主要研究方向为固体氧化物燃料电池; 曾燕伟(联系人),教授,Email: zengyanwei@tom.com..
更新日期/Last Update: 2013-11-30