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.

在当前的研究中，通过在真空中利用简单的一步固态反应烧结方法，采用了各种量的MgO单一掺杂剂来制造高质量的透明YAG陶瓷。在仅0.03重量％的MgO掺杂量下，在1820℃下烧结8小时之后，可获得在1064nm下具有84.5％的透射率的YAG透明陶瓷。系统地研究了制成的YAG陶瓷的微观结构演变和光学性能随MgO掺杂浓度的变化。当烧结温度低于1660°C时，MgO掺杂剂可以有效地促进YAG陶瓷的致密化，并在1540°C和1660°C之间显着促进其晶粒长大。进一步增加MgO的掺杂量不会有利于YAG陶瓷的光学质量，