期刊文献+

溶胶-凝胶法制备(La_(1-x)Sr_x)_2Ce_2O_(7-x)及热物理性能研究 被引量:2

Preparation of (La_(1-x)Sr_x)_2Ce_2O_(7-x) by Sol-Gel method and its thermophysical properties
在线阅读 下载PDF
导出
摘要 摘要:采用溶胶-凝胶法合成(La1-xSrx)2Ce2O7-x系列组分样品.研究结果表明:当Sr的掺杂量(戈)小于10%时,(La1-xSrx)2Ce2O7-x系列组分样品都是缺陷萤石结构.随着温度的升高,样品的热膨胀系数(TEC)增大,而热导率(TC)呈减小趋势.在一定温度下,((La1-xSrx)2Ce2O7-x的TEC随z的增大而增大;当Sr掺杂量x在0—7.5%之间增加时,样品的热导率不断减小,至x=7.5%时达到极小值,然后随戈的增大.样品的TC又明显增大. Series of Sr-doping La2Ce207 samples, that is (La1-xSrx)2Ce2O7-x,were synthesized with sol-gel method. It is shown that (La1-xSrx)2Ce2O7-x crystallize in pure defect-fluorite structure when the Sr-doping amount (x) is less than 0.1. With increasing of temperature, the thermal expansion coefficients (TECs) of (La1-xSrx)2Ce2O7-x increase, and the thermal conductivities (TCs) decrease. At a certain temperature, the TECs of (La1-xSrx)2Ce2O7-x increase with x increasing; and the TCs decrease when x changes from 0 to 0.075,then increase obviously when x≥0.075.
出处 《有色金属科学与工程》 CAS 2015年第4期27-30,共4页 Nonferrous Metals Science and Engineering
基金 国家自然科学基金资助项目(21471088)
关键词 铈酸镧 锶掺杂 热膨胀系数 热导率 thermal expansion coefficient lanthanum cerate Sr-doping thermal conductivity
  • 相关文献

参考文献16

  • 1刘海浪,王宝健,刘永丹,闫丰.热障涂层的研究现状与进展[J].新技术新工艺,2008(5):92-95. 被引量:11
  • 2刘纯波,林锋,蒋显亮.热障涂层的研究现状与发展趋势[J].中国有色金属学报,2007,17(1):1-13. 被引量:142
  • 3Tom S, Derek R, Ahsan J, et al. Damage mechanisms, life pre- diction, and development of EB-PVD thermal barrier coatings for turbine airfoil[J]. Surface & Coatings Technology, 2007, 202: 658- 664.
  • 4Gao X Q, Vassen R, Srover D. Ceramic materials for thermal bar- rier coatings[J]. Journal of the European Ceramic Society, 2004, 24(1): 1-10.
  • 5吴琼,张鑫,彭浩然,冀晓鹃,章德铭,任先京.烧绿石结构A_2B_2O_7热障涂层材料热物理性能综述[J].热喷涂技术,2014,6(1):1-9. 被引量:13
  • 6马文,宋峰雨,董红英,许萍,伦文山,郑学斌.Y_2O_3与Gd_2O_3共掺杂SrZrO_3热障涂层材料的热物理性能[J].无机材料学报,2012,27(2):209-213. 被引量:14
  • 7Andrievskaya E R, Kornienko O A, Sayir A, et al. Phase Relation Studies in the ZrO2-CeO2-La2O3 System at 1 500 ℃[J]. Journal of the American Ceramic Society, 2011, 94(6) : 1911-1919.
  • 8Dong H Y, Wang D X, Pei H Y, et al. Optimization and thermal cycling behavior of La2Ce2O7 thermal barrier coatings[J]. Ceramics International, 2013, 39: 1863-1870.
  • 9Jia S K, Zou Y, Xu J Y, et al. Effect of TiO2 content on properties of A1203 thermal barrier coatings by plasma spraying[J]. Transactions of Nonferrous Metals Society of China, 2015, 25 : 175-183.
  • 10Friedrich C J, Gadow R, Schirmer T. Lanthanum hexaaluminate-a new material for atmospheric plasma spraying of advanced thermal barrier coatings[J]. Journal of Thermal Spray Technology, 2001, 10(4) : 592-598.

二级参考文献139

共引文献178

同被引文献3

引证文献2

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部