Hydrothermal oxidation of niobium metal
Hydrothermal oxidation of niobium metal
复制标题
金属铌的水热氧化
DOI：
10.2109/jcersj.96.29
复制
发表时间：
1988
影响因子：
1.1
通讯作者：
S. Sōmiya
中科院分区：
文献类型：
--
作者：
M. Yoshimura;Seung;S. Sōmiya
Reactions of niobium metal powder with high temperature-high pressure water were studied in an open system under the conditions of 300°-800°C, 10-100MPa and 3-72h. Niobium pentaoxide (Nb2O5), niobium hydride (NbHx), and NbO2 were obtained from niobium. Niobium changed into orthorhombic Nb2O5 and niobium hydride at 400°C under 100MPa for 3h. Only orthorhombic, or/and monoclinic Nb2O5 were obtained above 700°C under 100MPa for 3h. The formation of oxides and hydrides caused cracking on the surface above 400°C (100MPa, 3h) resulting in disintegration of grains above 500°C (100MPa, 3h). The partial crystal growth of Nb2O5 was observed above 700°C (100MPa, 3h). Temperature and reaction duration affected the hydrothermal oxidation of Nb metal, but pressure did not.
