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Lu_(2)(MoO_(4))_(3):Eu^(3+)荧光粉的制备及热增强发光
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作者 陈子军 曹春燕 +4 位作者 郑翌飞 张敏 黄倪慧 白碧海 谢安 《功能材料》 CAS CSCD 北大核心 2023年第4期4196-4201,共6页
采用固相法制备了Lu_(2)(MoO_(4))_(3):Eu^(3+)系列红色荧光粉,利用X射线粉末衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)、能谱仪(EDS)和荧光光谱(PL)仪对制备荧光粉的结构、形貌、元素组成及光致发光性能进行表征与分析。实验结果表明... 采用固相法制备了Lu_(2)(MoO_(4))_(3):Eu^(3+)系列红色荧光粉,利用X射线粉末衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)、能谱仪(EDS)和荧光光谱(PL)仪对制备荧光粉的结构、形貌、元素组成及光致发光性能进行表征与分析。实验结果表明Eu^(3+)成功掺入基质晶格中并得到Lu_(2)(MoO_(4))_(3):Eu^(3+)纯相样品,荧光粉颗粒大小在2μm左右。制备温度依赖样品光致发光结果表明1000℃下制备Lu_(2)(MoO_(4))_(3):Eu^(3+)样品发光性能最好。煅烧时间依赖样品光致发光结果表明1000℃下煅烧时间为6 h时样品发光效果最好。反常于荧光粉发光热猝灭现象,Lu_(2)(MoO_(4))_(3):Eu^(3+)样品在外界测试温度为250℃左右时出现热增强发光现象,与Lu_(2)(MoO_(4))_(3)负热膨胀特性有关。 展开更多
关键词 固相法 Lu_(2)(MoO_(4))_(3):Eu^(3+) 荧光粉 热增强发光 膨胀
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Modeling and analysis of a novel oxygen production approach with full-spectrum solar energy for the lunar human base
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作者 Wei Zhu Maobin Hu 《中国科学技术大学学报》 北大核心 2025年第2期2-17,1,I0001,共18页
Building a lunar human base is one of the important goals of human lunar exploration.This paper proposes a method for the production of oxygen by combining photothermal synergistic water decomposition with high-temper... Building a lunar human base is one of the important goals of human lunar exploration.This paper proposes a method for the production of oxygen by combining photothermal synergistic water decomposition with high-temperature carbon dioxide electrolysis,utilizing the full solar spectrum.The optimal oxygen production rates under different solid oxide electrolysis cell inlet temperatures T_(e),ultraviolet(UV)separation wavelengths λ_(2),infrared(IR)separation wavelengths,and photovoltaic cell materials were explored.The results indicate that the inlet temperature of the solid oxide electrolysis cell should be as high as possible so that more carbon dioxide can be converted into carbon monoxide and oxygen.Furthermore,when the ultraviolet separation wavelength is approximately 385 nm,the proportion of solar energy allocated to the photoreaction and electrolysis cell is optimal,and the oxygen production rate is highest at 2.754×10^(-4) mol/s.Moreover,the infrared separation wavelength should be increased as much as possible within the allowable range to increase the amount of solar radiation allocated to the electrolysis cell to improve the rate of oxygen generation.In addition,copper indium gallium selenide(CIGS)has a relatively large separation wavelength,which can result in a high oxygen production rate of 3.560×10^(-4) mol/s.The proposed integrated oxygen production method can provide a feasible solution for supplying oxygen to a lunar human base. 展开更多
关键词 lunar oxygen production full-spectrum solar energy photovoltaic and photon-enhanced thermionic emission electrolysis of carbon dioxide photothermal synergistic reaction solid oxide electrolysis cell
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