Mn掺杂对(Y_(0.4)Er_(0.6))_(3)Al_(5)O_(12)热障涂层材料的微观结构和导热性能的影响  

Effect of Mn Doping on Microstructure and Thermal Conductivity of(Y_(0.4)Er_(0.6))_(3)Al_(5)O_(12)Ceramics Material for Thermal Barrier Coating

作　　者：王俊 王炫力 刘爽 宋蕊 宋希文[1] WANG Jun;WANG Xuanli;LIU Shuang;SONG Rui;SONG Xiwen(School of Materials Science and Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料科学与工程学院,包头014010

出　　处：《材料研究学报》2024年第6期463-470,共8页Chinese Journal of Materials Research

基　　金：国家自然科学基金(52372062);内蒙古自治区直属高校基本科研业务费项目(2023QNJS016);内蒙古科技大学创新基金项目(2019QDL-B03)。

摘　　要：采用固相合成法制备(Y_(0.4)Er_(0.6))_(3)(Al_(1-y)Mn_(y))5O12(y=0,0.02,0.04,0.06,0.08,0.1)陶瓷材料,使用X射线衍射仪及Rietveld精修、X射线光电子能谱仪、扫描电子显微镜、X射线能谱仪、透射电子显微镜和激光导热仪等手段对其表征,研究了Mn掺杂对其微观结构和导热性能的影响。结果表明:(Y_(0.4)Er_(0.6))_(3)(Al_(1-y)Mn_(y))5O12陶瓷材料均为单一的YAG相,随着Mn掺杂量的提高晶格常数和晶胞体积先减小后增大,Mn2+逐渐占据晶胞中的Al3+位置但是Y_(3)Al_(5)O_(12)的晶体结构不变;Mn掺杂使(Y_(0.4)Er_(0.6))_(3)(Al_(1-y)Mn_(y))5O12陶瓷材料的热导率显著降低,y=0.06的陶瓷材料热导率最低,在1100℃热导率约为1.38 W/(m·K),比纯YAG陶瓷的热导率(2.1 W/(m·K))降低了约34.6%。Ceramic materials(Y_(0.4)Er_(0.6))_(3)(Al_(1-y)Mn_(y))5O12(y=0,0.02,0.04,0.06,0.08,0.1)were prepared by solid phase synthesis method,and their microstructure and thermal conductivity were studied by X-ray diffractometer and Rietveld refinement method,X-ray photoelectron spectroscopy,scanning electron microscopy,X-ray energy spectroscopy,transmission electron microscopy,laser thermal conductivity tester.The results show that the ceramic materials of(Y_(0.4)Er_(0.6))_(3)(Al_(1-y)Mn_(y))5O12 are all single YAG phase,with the increase of Mn doping,the lattice constant and cell volume decrease and then increase,Mn2+gradually occupies the position of Al3+in the cell,keeping the crystal structure of Y_(3)Al_(5)O_(12)unchanged;the thermal conductivity of the ceramic material(Y_(0.4)Er_(0.6))_(3)(Al_(1-y)Mn_(y))5O12 is significantly reduced,with the lowest thermal conductivity at Mn doping y=0.06,which is about 1.38 W/(m·K)at 1100oC,and reduced by about 34.6%compared to that of the pure ceramic material YAG(2.1 W/(m·K)).

关 键 词：无机非金属材料 热障涂层 钇铝石榴石 双位掺杂 微观结构 热导率 

分 类 号：TQ174.1[化学工程—陶瓷工业]