【摘要】 为了研究微量Al₂O₃添加对Mg-PSZ粉体烧结活性和陶瓷性能的影响，以ZrO₂、MgO和Al₂O₃为原料，固相烧结合成微量Al₂O₃添加的氧化镁部分稳定氧化锆（Mg-PSZ）陶瓷试样，与未添加Al₂O₃的Mg-PSZ试样进行比较分析。研究烧结温度（1 000～1 700℃保温2 h,间隔100℃）对试样物相组成、显微结构、性能的影响。结果表明：1)随烧结温度的升高，2种试样中c-ZrO₂和t-ZrO₂相的含量均增加，离子电导率均增加，但未添加Al₂O₃的试样的体积密度增加，而添加Al₂O₃的试样的体积密度先增加后减小；2)添加Al₂O₃的试样的综合性能比未添加Al₂O₃的试样的好；3)添加Al₂O₃的试样经1 600℃烧后的综合性能最好。更多还原

【Abstract】 In order to study the effect of a trace Al₂O₃ addition on the properties of Mg-PSZ ceramics, MgO partially stabilized zirconia（Mg-PSZ） ceramic samples with trace Al₂O₃ were synthesized by solid-state sintering using ZrO₂,MgO,and Al₂O₃ as raw materials, and compared with Mg-PSZ samples without Al₂O₃.The effects of sintering temperatures（1 000-1 700 ℃ for 2 h with an interval of 100 ℃） on the phase composition, microstructure, properties of the samples were studied.The results show that:（1）with the sintering temperature rising, the total contents of c-ZrO₂ and t-ZrO₂ phases in the two samples both increase, the ionic conductivity increases; however, the bulk density of the sample without Al₂O₃ increases, while that of the samples with Al₂O₃ increases first and then decreases;（2）the comprehensive performance of the sample with Al₂O₃ is better than that without Al₂O₃;（3）the sample with Al₂O₃ has the best comprehensive performance after firing at 1 600 ℃.更多还原