Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Zirconia galvani sensor for the measurement of oxygen activity

용존산소활량 측정용 지르코니아 갈바니 센서

  • Oh, Young-Jei (Thin Film Materials Research Center, Korea Institute of Science and Technology)
  • 오영제 (박막재료연구센터, 한국과학기술연구원)
  • Published : 2009.11.30
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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.

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References

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