【摘要】 为了提高氧化镁部分稳定氧化锆（Mg-PSZ）陶瓷的离子电导率，通过水解法、球磨法及水解-球磨法分别制备了2.8%Mg-PSZ粉体，分析比较了各粉体经1600℃烧结2 h所得陶瓷样品的致密性、物相及离子电导率。实验结果显示：三种工艺制备的陶瓷样品致密性相近且均表现出高致密性特点（体积密度>5.7 g/cm³,显气孔率<2%）,但物相组成和离子电导率存在较大差异，其中水解-球磨法制备的陶瓷样品（c+t）-ZrO₂相含量达72%,显著高于水解法（63%）和球磨法（54%）,电化学测试显示，该陶瓷样品在950℃的离子电导率为1.55×10^-2 S/cm,较水解法(1.02×10^-2 S/cm)和球磨法(3.43×10^-3 S/cm)分别提升了51.9%和351.8%。研究表明，水解-球磨法通过优化粉体特性可有效改善Mg-PSZ陶瓷的离子传输性能，进而提高陶瓷的离子电导率。更多还原

【Abstract】 To improve the ionic conductivity of magnesia-partially stabilized zirconia（Mg-PSZ） ceramics, 2.8% Mg-PSZ powders were prepared through the hydrolysis, the ball milling, and the hydrolysis-ball milling composite method, respectively. A comparative analysis was conducted on the densification, phase composition, and ionic conductivity of the ceramic samples obtained by sintering these powders at 1600 ℃ for 2 hours. Experimental results revealed that the ceramic samples prepared by the three processes showed comparable densification and all samples exhibited high densification characteristics（bulk density >5.7 g/cm³, apparent porosity <2%）, but showed significant differences in the phase composition and ionic conductivity. The ceramic sample prepared by the hydrolysis-ball milling method demonstrated the highest（c+t）-ZrO₂ phase content of 72%, substantially superior to that obtained by hydrolysis method（63%） and ball milling method（54%）. Electrochemical tests indicated that an ionic conductivity of 1.55×10^-2 S/cm at 950 ℃ was achieved by the composite-processed ceramic, representing 51.9% and 351.8% improvements compared to that of hydrolysis method(1.02×10^-2 S/cm) and ball milling method(3.43×10^-3 S/cm), respectively. The study demonstrates that the powder characteristics were optimized by the hydrolysis-ball milling composite process, and ionic transport properties were enhanced, thereby the ionic conductivity of Mg-PSZ ceramics was significantly improved.更多还原