Indium oxide based ceramics as advanced material for fuel cell interconnctors
The nanocrystalline solid solutions on the basis of indium oxide (8 - 10 nm) in systems In<sub>2</sub>O<sub>3</sub> - ZrO<sub>2</sub> and In<sub>2</sub>O<sub>3</sub> - HfO<sub>2</sub> synthesized by method of coprecipitation hydroxide. It has been established that the use of polyvinyl alcohol allows to reduce the degree of agglomeration of precipitation and increase the dispersity of the synthesized powders. The optimal conditions of consolidation powders on the basis of In<sub>2</sub>O<sub>3</sub> were selected. It is shown that doping In<sub>2</sub>O<sub>3</sub> dioxides of zirconium and hafnium significantly increases the electrical conductivity of solid solutions compared to pure indium oxide. The influence of temperature and oxygen partial pressure on the magnitude of conductivity of solid solutions on the basis of In<sub>2</sub>O<sub>3</sub> was investigated.