发射率
材料科学
陶瓷
兴奋剂
红外线的
价(化学)
制作
挥发
分析化学(期刊)
浸出(土壤学)
矿物学
化学工程
光电子学
复合材料
光学
环境化学
土壤水分
化学
医学
物理
替代医学
有机化学
环境科学
病理
土壤科学
工程类
作者
X. Q. Yuan,Qinghu Wang,Wenguang Luo,Chengbiao Ding,Liang Huang,Yong Xu,Xiong Liang,Liping Pan,Shaobai Sang,Yawei Li,Haijun Zhang,Jiangtao Li
标识
DOI:10.1016/j.jeurceramsoc.2023.11.052
摘要
Ca2+/Cr3+ co-doped LaAlO3 has been considered as important ceramic to achieve energy-savings in thermal equipment due to excellent infrared radiation (IR) performance. However, following problems restricted its industrial applications: one is the correlation between emissivity and the valence state of Cr which is not clear, then there is no quantitative evaluation of Cr6+ content in ceramics. In this work, Ca2+/Cr3+ co-doping LaAlO3 ceramics have been fabricated. By adjusting Ca2+/Cr3+ doped ratio (0≤n(Ca2+)/n(Cr3+)≤0.75), the “Cr3+→(Cr4+/Cr6+)” transformation ratio has been controlled. The results show that a higher concentration of Cr4+ in the material can significantly enhance the emissivity, while Cr6+ has no such effect. In addition, the Cr6+ content was measured by leaching method and high-temperature volatilization methods, respectively. This work can be used to guide the fabrication of environment-friendly Ca2+/Cr3+ co-doped LaAlO3-based ceramics with high emissivity in the field of energy-saving for thermal equipment.
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