Liquid-phase sintering of ZrO2-based nanocrystalline glass-ceramics achieved by multi-element co-doping
发布时间：2022-12-15
点击次数：
DOI码：10.1111/jace.18945
发表刊物：Journal of the American Ceramic Society
摘要：Liquid phase sintering is an effective pathway to assist the densification of ceramics. However, it has seldomly been used to densify glass-ceramics. In the present study, a multi-element co-doping strategy has been utilized to achieve liquid phase sintering of a ZrO2-SiO2 nanocrystalline glass-ceramic. Compared with undoped samples densified by solid state sintering, doping of equimolar Al, Y, and Ca promoted the densification of the glass-ceramic at lower temperatures with a faster densification rate. Ternary doping enhanced coarsening of ZrO2 nanocrystallites during sintering and annealing. The distribution of dopants was carefully observed with X-ray energy-dispersive spectrometry (EDS) technique in scanning electron transmission microscopy (STEM) mode. Results showed that the three dopants showed different distribution behaviors. After sintering, Y dopants were predominately distributed in ZrO2 nanocrystallites, whereas, part of Al and Ca dopants were distributed in ZrO2 nanocrystallites and part of them co-segregated at the ZrO2/SiO2 heterointerfaces. Meanwhile, segregation of Ca dopant at some the intergranular films between ZrO2 nanocrystallites was observed. Redistribution of dopants did not occur during annealing.
合写作者：Bohan Wang, Ying Deng, Guofu Xu, Jiwu Huang, Hakan Engqvist
第一作者：Le Fu*
论文类型：期刊论文
通讯作者：Wei Xia
卷号：106
页面范围：2702-2715
是否译文：否
发表时间：2023-01-15
发布期刊链接：https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.18945