(Gd_(1-x)Er_x)_(2)Zr_(2)O_(7)红外发射率对高温导热性能的影响规律研究  

Effect of High Temperature Infrared Emissivity of(Gd_(1-x)Er_(x))2Zr_(2)O_(7)Ceramic Material on Its Thermal Conductivity

作　　者：裴训 谢敏[1,2] 李瑞一 刘洋 宋希文 安胜利[1,2] 牟仁德 Pei Xun;Xie Min;Li Ruiyi;Liu Yang;Song Xiwen;An Shengli;Mu Rende(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China;Key Laboratory of Advanced Ceramic Materials and Devices of Inner Mongolia Au-tonomous Region,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]内蒙古自治区先进陶瓷材料与器件重点实验室,内蒙古包头014010

出　　处：《中国稀土学报》2023年第6期1111-1118,I0003,共9页Journal of the Chinese Society of Rare Earths

基　　金：内蒙古自治区“高等学校青年科技人才发展项目”(NJYT23008);内蒙古自治区高等学校科学研究项目(NJZZ23055);国家自然科学基金项目(52372062);北方稀土科研项目(BFXT-2022-D-0053)资助。

摘　　要：采用固相合成法制备Er_2O_(3)掺杂(Gd_(1-x)Er_x)_(2)Zr_(2)O_(7)(x=0,0.1,0.2)陶瓷材料,利用X射线衍射仪、激光导热仪以及傅里叶变换红外光谱仪对陶瓷材料的物相结构、热导率及高温红外发射率分别表征并对结果进行分析。结果表明,在Rad+pc模型中(Gd_(1-x)Er_x)_(2)Zr_(2)O_(7)陶瓷试样的热导率随掺杂量先降低后升高,总体上,Er^(3+)的掺杂降低了Gd_(2)Zr_(2)O_(7)的热导率,而Cape+pc模型中(Gd_(1-x)Er_x)_(2)Zr_(2)O_(7)陶瓷试样热导率首先随温度升高而逐渐降低,800℃出现拐点随温度呈增大趋势。随Er_2O_(3)掺杂量的增加,(Gd_(1-x)Er_x)_(2)Zr_(2)O_(7)陶瓷试样1100℃红外发射率(3~5μm)与光子热导率具有相同变化趋势,发射率的降低导致了热导率测试值的增大,这一现象与材料晶格振动相关。Er_(2)O_(3) doped(Gd_(1-x)Er_(x))_(2)Zr_(2)O_(7)(x=0,0.1,0.2)ceramics were prepared by solid-state synthesis.The phase structure,high temperature thermal conductivity and infrared emissivity of the ceramics were characterized and analyzed by X-ray diffraction,laser thermal conductivity and Fourier transform infrared spectroscopy,respectively.The results show that in the Rad+pc model,the thermal conductivity of(Gd_(1-x)Er_(x))_(2)Zr_(2)O_(7)ceramic samples first decreases and then increases with the doping amount.In general,Er^(3+)doping reduces the thermal conductivity of Gd_(2)Zr_(2)O_(7),while in Cape+pc model,the thermal conductivity of the(Gd_(1-x)Er_(x))_(2)Zr_(2)O_(7)ceramic sample firstly decreases with the increase of temperature,and the inflection point at 800℃increases with the temperature.The infrared emissivity(3~5μm)and thermal radiation transmittance of(Gd_(1-x)Er_(x))_(2)Zr_(2)O_(7)ceramic sample have the same change trend with the increase of doping content at 1100℃.The decreases of infrared emissivity lead to high thermal conductivity for the samples,which are ralated to the changes of the lattice vibration.

关 键 词：Gd_(2)Zr_(2)O_(7) 红外发射率 热障涂层材料 晶格振动 

分 类 号：TG174.45[金属学及工艺—金属表面处理] TQ174[金属学及工艺—金属学]