摘要
用固相反应法制备(Gd_(1-x)Erx)_(2)(Zr_(0.8)Ti_(0.2))_(2)O_(7)(摩尔分数x=0,0.2,0.4)陶瓷并测试其晶体结构、显微形貌和物理性能,研究了Er_(2)O_(3)掺杂的影响。结果表明,(Gd_(1-x)Erx)_(2)(Zr_(0.8)Ti_(0.2))_(2)O_(7)陶瓷具有立方烧绿石结构,显微结构致密,在室温至1200℃高温相的稳定性良好;Er3+掺杂降低了陶瓷材料的热导率和平均热膨胀系数,当x=0.2时,其1000℃的热导率最低(为1.26 W·m^(-1)·k^(-1))。同时,Er 3+掺杂还提高了这种材料的硬度和断裂韧性。
Er_(2)O_(3) doped ceramic materials(Gd_(1-x)Erx)_(2)(Zr_(0.8)Ti_(0.2))_(2)O_(7)(x=0,0.2,0.4,x is mole fraction)were prepared by solid-state reaction method,the crystallographic structure,microstructure,thermophysical properties and mechanical properties of the materials were examined in terms of the effect of Er_(2)O_(3) dop-ing.The results show that(Gd_(1-x)Erx)_(2)(Zr_(0.8)Ti_(0.2))_(2)O_(7)ceramic material presents the same crystallographic structure as cubic pyroclase with good high temperature phase stability from room temperature to 1200℃.Er3+doping can reduce the thermal conductivity and the average thermal expansion coefficient of the ceramic materials,peculiarly,the thermal conductivity of(Gd0.8 Er0.2)2(Zr 0.8 Ti0.2)2O 7 ceramic material is the lowest at 1000℃,which is 1.26 W·m^(-1)·k^(-1).In addition,the doping of Er3+can improve the hardness and fracture toughness of the material.
作者
李瑞一
谢敏
张永和
裴训
刘洋
宋希文
LI Ruiy;XIE Min;ZHANG Yonghe;PEI Xun;LIU Yang;SONG Xiwen(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2022年第1期49-54,共6页
Chinese Journal of Materials Research
基金
国家自然科学基金(51762036)
内蒙古自治区应用技术研究与开发资源资金项目。
关键词
无机非金属材料
热障涂层材料
烧绿石结构
热物理性能
增韧
inorganic non-metallic materials
thermal barrier coating materials
pyrochlore
thermal properties
enhanced toughness
