MgO assisted densification of highly transparent YAG ceramics and their microstructural evolution. Issue 2 (February 2018)

• Record Type: Journal Article
• Authors: Zhou, Tianyuan; Zhang, Le; Wei, Shuai; Wang, Lixi; Yang, Hao; Fu, Zhenxiao; Chen, Hao; Selim, Farida A.; Zhang, Qitu
• Is Part Of: Journal of the European Ceramic Society. Volume 38:Issue 2(2018)
• Page Start: 687
• Page End: 693
• Publication Date: 2018-02
• Subjects: Transparent YAG ceramic -- MgO additive -- Grain growth -- Densification -- Optical property; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.09.017
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: In current study, various amounts of MgO single dopant was adopted to fabricated high quality transparent YAG ceramics, by utilizing a simple one-step solid state reaction sintering method in vacuum. At a MgO doping amount of only 0.03 wt.%, YAG transparent ceramics with a transmittance of 84.5% at 1064 nm could be obtained, after sintering at 1820 °C for 8 h. The microstructure evolution and optical property of as-fabricated YAG ceramics as a function of MgO doping concentration were systematically investigated. MgO dopant could effectively promote densification of YAG ceramics when the sintering temperature was lower than 1660 °C, and dramatically accelerate its grain growth between 1540 °C and 1660 °C. Further increase the doping amount of MgO would not benefit to the optical quality of YAG ceramics, and the intragranular pores as well as the Mg-riched secondary phase were observed from the MgO heavily doped ceramics.