E. I. Burmakin

Transport properties of Sm1-xCaxCr1-yCuyO3 solid solutions

Sm1-xCaxCr1-yCuyO3 perovskite solid solutions were prepared, and their properties were studied. The solid solutions, unreactive with a ZrO2-based solid electrolyte, are candidate electrode and interconnection materials for high-temperature fuel cells

Electrochemical Properties of Nitride Phases in the Si3N4–Ca3N2and Si3N4–AlN–Ca3N2Systems

The electrical conductivity of silicon nitride and its solid solutions with calcium nitride and aluminum nitride was measured in the ranges 400–900 and 1000–1300°C. The conduction mechanisms were found to be substantially different in these temperature ranges. The Si3N4–Ca3N2solid solutions exhibited high ionic conductivity between 400 and 900°C. The densest and most oxidation-resistant materials were obtained in the Si3N4–AlN–Ca3N2system (Al introduced as fine powder and then nitrided).

Effect of Calcium Doping on the Electrical Conductivity of Yttrium Nitride

Data are presented on the electrical conductivity and ionic transference numbers of undoped and Ca3N2-doped YN. With increasing Ca3N2 content, the conductivity of the material increases. The ionic transference number determined by emf measurements is close to unity.