硅酸盐学报2018，Vol.46Issue(3)：354-360,7.DOI:10.14062/j.issn.0454-5648.2018.03.07
燃烧法制备不同钆含量的GDC纳米粉体及其电导性
Preparation of GDC Nanopowder with Different Gadolinium Contents by Combustion Method and Its Electrical Conductivity
摘要
Abstract
GDC(Gd2O3 doped CeO2) nanopowders were synthesized by a glycine combustion method, and the effect of gadolinium content on the electrical properties of GDC sintered body was investigated. The results indicate that the grain size of GDC nanopowder is approximately 30 nm, and the optimum sintering properties are obtained. The lattice parameter of GDC nanopowder increases with the increase of Gd2O3 content, and the sintered body of GDC with a relative density of > 97％ can be obtained after sintering at 1250℃ for 3 h. When the Gd2O3content is 15％(mole fraction), the conductivity of GDC is the maximum at < 700℃, and the activation energy of oxygen ion is 0.593eV. The oxygen vacancies in the GDC electrolyte with Gd2O3 content of 10％ dissociate from the clusters into free oxygen vacancies, and the critical temperature point is 550℃. The critical temperature point of GDC with Gd2O3 contents of 15％ and 20％ is 600℃.关键词
氧化钆掺杂的二氧化铈/电导率/活化能/氧空位缔合Key words
gadolinia doped ceria/electrical conductivity/activation energy/oxygen vacancy association分类
化学化工引用本文复制引用
程亮,罗凌虹,徐序,石纪军,吴也凡..燃烧法制备不同钆含量的GDC纳米粉体及其电导性[J].硅酸盐学报,2018,46(3):354-360,7.基金项目
国家自然科学基金(51662015 （）
51462011) （）
江西省教育厅科技落地计划(KJLD13072)资助. （KJLD13072）
