Microstructural regulation and properties enhancement of MgO-CaO ceramics by doping Y_(2)O_(3)  

作　　者：Nian Yi Yan Ma Zhoufu Wang Hao Liu Xitang Wang Yunjie Dong Zhongfeng Xia Yuxuan Zhu Chengji Deng 

机构地区：[1]The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China

出　　处：《Journal of Rare Earths》2023年第11期1771-1779,I0005,共10页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (U20A20239,U21A2057);the Key Research and Development Project of Hubei Province (2021BAD002)。

摘　　要：MgO-CaO ceramics with enhanced microhardness and hydration resistance were successfully prepared by doping Y_(2)O_(3) in this work.The effects of introducing Y_(2)O_(3) on the microstructure and properties of MgO-CaO ceramics were investigated.The microstructural regulation effects of Y_(2)O_(3) additive on MgO,CaO,and MgO-CaO ceramics were analyzed comparatively.The results show that Y_(2)O_(3) dissolves into the CaO lattice to form solid solution in CaO ceramics,and no obvious intergranular phase forms.While the Y_(2)O_(3) additive leads to the micro structural reconstruction in MgO and MgO-CaO ceramics.By adding Y_(2)O_(3),SiO_(2) impurity from magnesium source reacts with CaO to form the silicate phases containing Y^(3+)ions in MgO-CaO ceramics.The increase in the MgO/CaO interface and the microstructural reconstruction synergistically improves the microhardness and hydration resistance of MgO-CaO ceramics markedly.

关 键 词：Y_(2)O_(3) MgO-CaO ceramics Microstructural regulation Reconstruction PROPERTIES Rare earths 

分 类 号：TQ1[化学工程]