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http://dx.doi.org/10.5369/JSST.2009.18.6.441

Zirconia galvani sensor for the measurement of oxygen activity  

Oh, Young-Jei (Thin Film Materials Research Center, Korea Institute of Science and Technology)
Publication Information
Journal of Sensor Science and Technology / v.18, no.6, 2009 , pp. 441-448 More about this Journal
Abstract
Magnesia partially stabilized zirconia(Mg-PSZ) solid electrolytes for an improvement of thermal shock resistance, which is suitable for the measurement of oxygen activity in a molten steel, were prepared by post-thermal aging treatment. The steelmaking oxygen sensor elements were formed by an injection molding method, sintered at $1650^{\circ}C$, and then thermal aged ranged from 1250 to $1400^{\circ}C$. Sintered density and porosity were decreased as increasing the magnesia content in a zirconia-magnesia solid solution. Fractions of cubic phase to the synthesized Mg-PSZ solid electrolytes were ranged from 13.13 to 79.54.% after post-thermal aging treatment. Very dense microstructure without voids in the grains was obtained by the post-thermal aging process. Fine tetragonal phase crystallites precipitated on the cubic surface during post-thermal aging up to $1300^{\circ}C$ improve a thermal shock resistance and reappearance of electro motive force(EMF) curve.
Keywords
magnesia stabilized zirconia; thermal aging; thermal shock resistance; tetragonal phase; steelmaking;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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