采用高温固相反应烧结法制备La0.7Ca0.3CrO3(LCC)/Al2O3导电陶瓷微滤膜支撑体.研究了烧成温度对制备的LCC/Al2O3支撑体样品的物相组成、微观结构、烧成收缩、孔隙率和孔径分布、电导率、抗弯强度、渗透通量及耐腐蚀性能等的影响.结果表明,高温烧成过程中LCC与Al2O3发生复杂的固相反应,样品主晶相为菱形结构La07Ca0.3Cr1-xAlxO3,并生成了少量LaAl11O18和CaCr2O4等.烧成温度从1350℃提高到1600℃时,样品的烧结程度、电导率、抗弯强度和耐酸腐蚀性能明显提高,而孔隙率明显减小.样品的平均孔径和纯水渗透通量随烧成温度提高,表现出先增大后减小的变化趋势.在1550℃时保温2h烧成制备的LCC/Al2O3支撑体,具有高的孔隙率(43.4％)和抗弯强度(36.9 MPa),其平均孔径(d50)为1.02 μm、纯水通量为2.24 m3/m2·h·bar、电导率为0.11 S/m,且具有良好的耐腐蚀性能.
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