文献类型：期刊文献

中文题名：不同铝含量及Tw80对铈锆固溶体的影响

英文题名：Effects of Different Alumina Contents and Tw80 on Ceria-zirconia Solid Solution

作者：韩毅[1];史运宝[1];马新胜[1];高玮[1,2]

机构：[1]华东理工大学化工学院超细粉末国家工程研究中心,上海200237;[2]上海华明高纳稀土新材料有限公司,上海201613

年份：2013

卷号：34

期号：2

起止页码：6

中文期刊名：稀土

外文期刊名：Chinese Rare Earths

收录：CSTPCD;;EI(收录号：20132016332065);Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家高技术研究发展计划(863计划)(2009AA03Z434);上海市科技型中小企业技术创新基金项目(0903H182400)

语种：中文

中文关键词：非均匀成核;铈锆固溶体;氧化铝;分散剂

外文关键词：heterogeneous nucleation; ceria - zirconia solid solution; Al2O3 ; dispersant

摘要：为了研究铈锆铝复合化合物(CZ/A)中氧化铝与铈锆固溶体的最佳配比,运用非均匀成核法首先制备了一系列不同Al2O3含量的铈锆铝复合化合物前驱体,之后将其在不同的温度下焙烧。通过比表面积(BET)、X射线衍射(XRD)及H2-TPR等手段,对其织构、高温稳定性、晶型结构及还原等性能进行表征。结果表明,样品的织构性能随着Al2O3含量的增大而增强;但从高温稳定性、单一晶型结构与还原储放氧性能方面看,Al2O3的含量过高,其性能反而会降低。因此,CZ/A性能的增强是Al2O3与铈锆固溶体颗粒间共同作用的结果,且Al2O3的适宜含量为30%～50%(质量分数)。此外,作为分散剂Tw80的添加有助于样品BET的增大及晶粒尺寸的减小,但其添加量也存在适宜的范围,其质量分数以20%～30%为宜。
In order to obtain the best contents of Al2O3 in cerium -zirconium - alumina （CZ/A） complex oxides, the CZ/A precursors with different alumina contents were prepared by heterogeneous nucleation methods, then the samples were calcinated at various temperatures. The properties of the prepared materials were characterized by Brunauer - Emmet Teller （BET）, XRD and Temperature- Programmed Reduction（ H2 -TPR）, and the results show that the textural properties of samples are improved with the increase contents of Al2O3 in CZ/A; while thermal stability, crystal structure and reducible ca- pacity will decrease if the contents of Al2O3 is too high. Therefore, the improvement of CZ/A samples＇ property is due to the interactions of particles between ceria -zirconia solid solution and Al2O3. It is demonstrated that the proper content of Al2O3 is 30% ~ 50% （ mass fraction）. In addition, the non - ionic surfactant Tw80, as a dispersant, is beneficial to the textural performance of CZ/A, with a suitable mass fraction of 20% ~ 30%.