오영제 2024-01-20T20:30:59Z 2024-01-20T20:30:59Z 2021-09-06 2009-11 1225-5475 https://pubs.kist.re.kr/handle/201004/131979 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℃, and then thermal aged ranged from 1250 to 1400℃. 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℃ improve a thermal shock resistance and reappearance of electro motive force(EMF) curve. Korean 한국센서학회 용존산소활량 측정용 지르코니아 갈바니 센서 Zirconia galvani sensor for the measurement of oxygen activity Article 2 센서학회지, v.18, no.6, pp.441 - 448 센서학회지 18 6 441 448 kci ART001391698 magnesia stabilized zirconia thermal aging thermal shock resistance tetragonal phase steelmaking