Zirconia electrical resistivity

Fig. 10. Effect of alumina content on the electrical resistivity of alumina-added yttria stabilized zirconia. From ref. [24], This paper was originally presented at the Fall 1989 Meeting of the Electrochemical Society held in Hollywood, Florida.

Kleitz, M. Bernard, H. Fernandez, E. Schouler, E. Impedance Spectroscopy and Electrical Resistance Measurements on Stabilized Zirconia in "Advances in Ceramics Vol. 3, SCIENCE AND TECHNOLOGY OF ZIRCONIA, ed. Hever, A. H., American Ceramic Society Columbus, Ohio, 1981. 

E. Dow Whitney, Electrical resistivity and diffusionless phase transformation of zirconia at high temperatures and ultrahigh pressures, J. Electrochem, Soc. 112(1), 91-94 (1965). 

Kleitz, M., Bernard, H., Fernandez, E., andSchouler, E. (1981). Impedance spectroscopy and electrical resistance measurements on stabihzed zirconia. Advances in Ceramics. Science and Technology of Zirconia, Vol. 3,310-336, Heuer, A. H., and Hobbs, L. W., eds., Washington, DC The American Ceramic Society. 

Zirconium oxide is fused with alurnina in electric-arc furnaces to make alumina—zirconia abrasive grains for use in grinding wheels, coated-abrasive disks, and belts (104) (see Abrasives). The addition of zirconia improves the shock resistance of brittle alurnina and toughens the abrasive. Most of the baddeleyite imported is used for this appHcation, as is zirconia produced by burning zirconium carbide nitride. 

Molybdenum shows good corrosion resistance to zirconia up to 2000° C but above about 1200°C, zirconia becomes electrically conductive and thus care must be taken in the design of high temperature furnaces using zirconia... 

With the possible exception of common line insulators, electrical porcelain is especially formulated and may contain varying percentages of zirconia and beryllia. These ingredients increase both strength (mechanical) and resistance to high temperatures. Hard porcelains are especially formulated to resist thermal shock as well. 

For the preparation of aluminate coatings, the deionized water was preheated with an electric heater under constant stirring to the desired temperature, a zirconia disc was inserted and then the AIN powder added to the water. The pH and temperature were measured versus time using a combined glass-electrode/Pt 1000 thermometer pH meter (Metrohom 827). In addition, some of the prepared boehmite coatings on zirconia surface were thermally treated in the resistance oven in dry air, at 900 °C, for 1 hour, at a heating rate 10 °C/min. 

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