Phase Stability of Yttria-Stabilized Zirconia with Dissolved Cerium and Neptunium Oxides Under Oxidizing and Reducing Atmospheres期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Phase Stability of Yttria-Stabilized Zirconia with Dissolved Cerium and Neptunium Oxides Under Oxidizing and Reducing Atmospheres

Authors:	Hajime Kinoshita Ken-ichi Kuramoto Masayoshi Uno Tadashi Yanagi Shinsuke Yamanaka Hisayoshi Mitamura Tsunetaka Banba

Affiliation:	Department of Nuclear Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan;Department of Environmental Safety Research, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-1195, Japan

Abstract:	Phase stability and effects of sintering atmosphere on the crystalline structure of Np-doped yttria-stabilized zirconia (YSZ) were evaluated in comparison with those same properties and conditions for Ce-doped YSZ. Different sintering atmospheres for Ce-doped YSZ led to differences in phase formation through reduction of the dopant from Ce⁴⁺ to Ce³⁺. On the other hand, YSZ specimens containing up to 40 mol% Np formed only a fluorite-structure phase regardless of sintering atmosphere. Yttria-stabilized zirconia thus seems to accommodate Np within a wide range of concentrations and to have excellent phase stability under both oxidizing and reducing atmospheres.

Keywords:	Phases Zirconia: Yttria stabilized Oxides