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Ce0.8Sm0.2O1.9的尿素燃烧法合成与性能
引用本文:王红,徐庆,黄端平,陈文,陈旻,金福熙.Ce0.8Sm0.2O1.9的尿素燃烧法合成与性能[J].高等学校化学学报,2009,30(10):1925-1929.
作者姓名:王红  徐庆  黄端平  陈文  陈旻  金福熙
作者单位:1. 武汉理工大学材料科学与工程学院,武汉,430070
2. 韩国全北国立大学氢能与燃料电池研究中心,全州,561-756
基金项目:国家自然科学基金,武汉市学科带头人计划,International Collaboration Program of Jeonbuk Procince资助 
摘    要:采用以尿素为燃料的燃烧合成法制备Ce0.8Sm0.2O1.9(SDC)氧离子导体材料, 对燃烧合成粉体的物相和显微形态进行了表征, 并研究了燃烧法合成SDC的烧结性能以及烧结体的导电性能. 研究结果表明, 采用尿素燃烧法合成SDC具有简便高效和合成粉体烧结活性高的优点. 经过燃烧过程后即可得到立方萤石结构的纯相SDC粉体, 合成粉体的分散性良好, 为50~150 nm的球形颗粒, 具有高的烧结活性, 在1250 ℃的烧结温度下, 陶瓷样品的相对密度可达到95.1%. 在600和800 ℃的测试温度下, 烧结温度为1250 ℃的陶瓷样品的电导率分别达到5.4×10-2和1.0×10-1 Ω-1·cm-1.

关 键 词:Ce0.8Sm0.2O1.9  氧离子导体  燃烧合成  尿素
收稿时间:2008-11-07

Urea-combustion Synthesis and Properties of Ce_(0.8)Sm_(0.2)O_(1.9)
WANG Hong,XU Qing,HUANG Duan-Ping,CHEN Wen,CHEN Min,KIM Bok-Hee.Urea-combustion Synthesis and Properties of Ce_(0.8)Sm_(0.2)O_(1.9)[J].Chemical Research In Chinese Universities,2009,30(10):1925-1929.
Authors:WANG Hong  XU Qing  HUANG Duan-Ping  CHEN Wen  CHEN Min  KIM Bok-Hee
Institution:WANG Hong1,XU Qing1,HUANG Duan-Ping1,CHEN Wen1,CHEN Min2,KIM Bok-Hee2(1.School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China,2.Department of Hydrogen and Fuel Cells Engineering,Hydrogen & Fuel Cell Research Center,Chonbuk National University,Jeonbuk 561-756,South Korea)
Abstract:Samaria-doped ceria(Sm0.2Ce0.8O1.9, SDC) is a promising candidate material for electrolyte of intermediate temperature(600—800 ℃) solid oxide fuel cells(IT-SOFCs). SDC powders were synthesized by a combustion method with urea as a fuel. The phase purity and morphology of the resulting powders were characterized by XRD, TG-DSC, FESEM and BET specific surface area measurement. Moreover, the sinterability and electrical conductivity of the SDC were examined. The results demonstrate that the urea-combustion process is a simple and efficient route to produce high reactive SDC powder. It was found that the SDC powder with a pure cubic fluorite phase could be produced via a short-time combustion process. The SDC powder is composed of uniform and dispersed sphere-like particles in the range of 50—150 nm. This desired morphology effectively enhanced the sinterability of the powder. A gas-tight relative density of 95.1% was obtained in the SDC ceramic sintered at a relative low temperature of 1250 ℃. Furthermore, the ceramic sintered at the temperature presented superior electrical conductivity, reaching 5.4×10-2 and 1.0×10-1 Ω-1·cm-1 at the measuring temperatures of 600 and 800 ℃, respectively.
Keywords:Ce0  8Sm0  2O1  9
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