Accession Number : AD0673409

Title :   ELECTRIC CONDUCTIVITY OF HIGHLY REFRACTORY OXIDES AT HIGH TEMPERATURES (ELEKTROPROVODNOST VYSOKOGNEUPOTNYKH OKISLOV PRI VYSOKIKH TEMPERATURAKH),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Palguev,S. F. ; Neuymin,A. D. ; Volchenkova,Z. S. ; Yushina,L. D.

Report Date : 30 JUN 1967

Pagination or Media Count : 28

Abstract : The electrical conductivity of pure oxides and their mixtures was investigated. The pure oxides were (a) the dioxides of zirconium, thorium, and cerium; (b) the oxides of beryllium, magnesium, calcium, and strontium; and (c) the oxides of yttrium, lanthanum, and neodymium. In all these groups, the temperature dependence of the electrical conductivity was determined and plotted on graphs. The oxide mixtures consisted of (a) systems of oxides based on zirconium dioxide (ZrO2-BeO, ZrO2-MgO, ZrO2-CaO, ZrO2-SrO, ZrO2-BaO), (b) systems based on thorium dioxide (ThO2-BeO, ThO2-MgO, ThO2-CaO, ThO2-SrO, ThO2-BaO), (c) systems based on cerium dioxide (CeO2-BeO, CeO2-MgO, CeO2-CaO, CeO2-SrO, CeO2-BaO), and (d) the systems CeO2-ZrO2 and (0.75CeO2.0.25ZrO2)-CaO. In all these mixtures, the isotherms of the electrical conductivity at 1000C were plotted. The experimental results lead the authors to the conclusion that the electrical conductivity of solid oxides is sensitive to many of their other properties; such as the tendency to react with one another and with the components of the gas phase and the tendency to be reduced. The conductivity also depends on the nature of the phases present. (Author)

Descriptors :   (*REFRACTORY MATERIALS, ELECTRICAL CONDUCTIVITY), (*OXIDES, ELECTRICAL CONDUCTIVITY), THORIUM COMPOUNDS, CERIUM COMPOUNDS, YTTRIUM COMPOUNDS, LANTHANUM COMPOUNDS, NEODYMIUM COMPOUNDS, STRONTIUM COMPOUNDS, ZIRCONIUM OXIDES, MAGNESIUM OXIDES, BERYLLIUM OXIDES, CALCIUM OXIDES, HIGH TEMPERATURE, USSR

Subject Categories : Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE