基于热膨胀性质的ZrO_2固体电解质性能与相关系模型

Model of the relationship between properties and phase composition of zirconia solid electrolyte

ZrO2固体电解质室温下各相的相对含量、高温可相变量是决定材料抗热震性和导电性能的关键因素.固体电解质抗热震性与导电性能的匹配,对低氧含量下的钢水定氧起着重要作用.以此为前提,建立了电解质材料体系的抗热震性与室温相比例之间的线性模型,提出了其高温电导率与相变之间的演化模型.为制备用于测低氧活度的高精度冶金氧传感器提供参考依据。

The relative content of each phase at room temperature and the ratio of transformable phase at high temperature of zirconia solid electrolyte are important to its thermal shock resistance and electrical conductivity.The match of thermal shock resistance and electrical conductivity plays an important role in measuring the lower oxygen activity in molten steel.A linear model between the thermal shock resistance and the phase composition at room temperature is proposed based on this concept,another evolved relationship between the pyroconductivity and the elevated temperature transformation is also proposed.These models provide theoretical reference for the preparation of the high precision oxygen sensor for measuring the lower partial pressure of oxygen in molten steel.