Oxidation-reduction properties of mixed oxides in lanthanum-uranium-oxygen system.

スポンサーリンク

概要

• 論文の詳細を見る

• The oxidation-reduction properties and the phase relations of mixed oxides in the system La-U-O were examined by means of thermogravimetry and X-ray diffraction method. The O/M ratios of the mixed oxides La<SUB>y</SUB>U<SUB>1-y</SUB>O<SUB>2±x</SUB> prepared at 1, 650°C in vacuo by the reaction of La<SUB>2</SUB>O<SUB>3</SUB> and UO<SUB>2</SUB>, were expressed as 2-0.5 y except 0.2 ?? y ?? 0.4. The oxides were the single fluorite phase at y ?? 0.7. These oxides of 0.2 ?? y ?? 40.6 were oxidation-susceptible in air even at room temperature. For the oxides heated or prepared in air at 1, 000°C, the O/M ratio vs. y relationship was composed of three line with the turning points, 2.26 at y=0.27 and 1.92 at y=0.70. The fluorite phase was observed in the regions of 0.3<y<0.45 and 0.7 ?? y<0.9, and the rhombohedral phase was in 0.55<y<0.7. The O/M ratios of the oxides reduced with hydrogen were nearly 2 at y ?? 0.2 and decreased with increasing y at y>0.2. The oxide of y=0.5 showed the curious property : The O/M ratio had a minimum when the oxide reduced with hydrogen was oxidized in air.

• 一般社団法人 日本原子力学会の論文

著者

• Watanabe Kenju

  Department Of 2nd Surgery School Of Medicine Hiroshma University

• Tagawa Hiroaki

  Institute Of Enviromental Science And Technology Yokohama National University

• FUJINO Takeo

  Division of Chemistry, Japan Atomic Energy Research Institute

• OUCHI Kinji

  Division of Chemistry, Japan Atomic Energy Research Institute

• MORIMOTO Takao

  Department of Chemistry, Tokyo Gakugei University

• SAITA Koji

  Department of Chemistry, Tokyo Gakugei University

関連論文

• B-37. Study on Cerebral Microvasculature and Cerebral Vascular Bed Volume in Acute Brain Swelling using Immunoflorescence Method and Quantitative Immunoelectrophoresis.
• La2-xSrxCuO4-δの高温電気伝導特性・熱電特性と欠陥構造
• SnSO4を含む硫酸ナトリウム電解質溶液における薄膜SnO2電極のインピ-ダンス測定
• Lattice parameters of mixed oxides in Sm-U-O system.
• Oxidation-reduction properties of mixed oxides in the cerium-uranium-oxygen system.
• Formation and properties of strontium uranates.
• Oxidation-reduction properties of mixed oxides in lanthanum-uranium-oxygen system.

スポンサーリンク