摘要
以Fe_(2)O_(3)-CuO-MnO_(2)系过渡金属氧化物材料为研究对象,研究基础体系中各氧化物之间的摩尔配比及杂质掺杂对材料双波段红外辐射性能的影响。利用IRE-2双波段发射率测量仪测量材料在3μm~5μm、8μm~14μm的常温红外发射率;利用紫外可见光分光光度计测定材料的UV-VIS吸收光谱,借助Taucplot法计算材料的禁带宽度,利用XRD、SEM-EDS分析材料的物相变化及显微结构特点。研究发现,Fe_(2)O_(3)-CuO-MnO_(2)体系的尖晶石型红外材料的8μm~14μm波段发射率远高于3μm~5μm波段。Fe_(2)O_(3)含量的提高会引起尖晶石晶格发生畸变及禁带宽度的下降,进而提高材料的红外发射率。掺杂Cr_(2)O_(3)、稀土氧化物Eu_(2)O_(3)和Y_(2)O_(3)会显著降低材料的禁带宽度,3μm~5μm发射率得到明显提升。其中,掺入Y_(2)O_(3)后3μm~5μm发射率提高了22.3%,达到0.890;掺杂Cr_(2)O_(3)对材料8μm~14μm红外发射率影响显著,发射率由0.909提升至0.956。
The effect of molar ratio and dopant on two-band infrared radiation performance of Fe_(2)O_(3)-CuO-MnO_(2)transition metal oxide materials were studied.Infrared emissivities of the materials at 3-5μm and 8-14μm bands were detected by using IRE-2 dual-band emissivity instrument at room temperature.UV-VIS absorption spectra of the materials were studied by using ultraviolet-visible spectrophotometer.Subsequently,width of the forbidden gap was calculated by using the Tauc plot method.The phase evolution and microstructure were analyzed by using XRD and SEM-EDS.It is found that the emissivity of the Fe_(2)O_(3)-CuO-MnO_(2)spinel infrared materials at 8-14μm band is much higher than that in 3-5μm band.Lattice distortion of the spinel crystals was observed and the width of forbidden gap was decreased with increasing content of Fe_(2)O_(3).The presence of Cr_(2)O_(3)and rare earth oxides Eu_(2)O_(3)and Y_(2)O_(3)is beneficial for improving the infrared emissivity in 3-5μm band.The width of forbidden band is obviously reduced and the optimal infrared radiation in 3-5μm band was obtained when Y_(2)O_(3)was introduced,where the value of emissivity was increased by 22.3%to 0.890.Furthermore,Cr_(2)O_(3)played a stronger role in improving the infrared radiation in 8-14μm band,while the emissivity was increased from 0.909 to 0.956.
作者
李森林
罗婷
夏光华
王建春
方益进
LI Senlin;LUO Ting;XIA Guanghua;WANG Jianchun;FANG Yijin(School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,Jiangxi,China;Hefei Biopin New Material Technology Co.,Ltd.,Hefei 231501,Anhui,China;Zhejiang Guwu Kiln Ceramic Culture Co.,Ltd.,Jinhua 321000,Zhejiang,China)
出处
《陶瓷学报》
CAS
北大核心
2023年第5期951-957,共7页
Journal of Ceramics
基金
江西省科技厅重点研发计划(20202BBE53012)
江西省高校人文社科重点研究基地项目(JD18050)
浙江省金华市科技局科技计划重点项目(2022-1-104)。
关键词
禁带宽度
晶格畸变
双波段
红外发射率
width of forbidden band
lattice distortion
dual-band
infrared emissivity
作者简介
通信联系人:罗婷(1983-),女,博士,副教授。E-mail:imadoki00@163.com。
