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Preparation and Photoluminescence of n-(Y0.95Eu0.05)2O3 and n-(Y0.95Eu0.05)2O3 Particles/SiO2 Aerogel Assemblies
Ye Changhui,Yao Lianzeng,Guo Chen,Mou Jimei,Shi Gang
Author NameAffiliationE-mail
Ye Changhui Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026  
Yao Lianzeng Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026 yaolz@ustc.edu.Cn 
Guo Chen Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026  
Mou Jimei Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026  
Shi Gang Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026  
Abstract:
Nanostructured(Y0.95Eu0.05)2O3 was synthesized through urea sol method,and n -(Y0.95Eu0.05)2O3 Particles / SiO2 aerogel assemblies were prepared by supercritical drying technique.The experimental results showed that we could achieve the maximum luminescence intensity by carefully choosing our optimal experimental conditions. When the molar ratio of Y3 + to Eu3 + equals 20: 1,homogenous reaction for 4h,then under 680℃,4h annealing,the luminescence intensity of n -(Y0.95Eu0.05)2O3 was the maximum. In n -(Y0.95Eu0.05)2O3 / SiO2 aerogel assemblies,annealing under the same conditions,when the molar ratio of Si to 2Y equals 1: 7,the luminescence intensity of the assembly is the strongest,but it was still weaker than the luminescence intensity of n -(Y0.95Eu0.05)2O3 . And the phenomena of the luminescence intensity decrement of the assemblies against the nano - bulks and the red shift of the luminescence peaks were discussed.
Key words:  Aerogels,Meso - porous assemblies,Supercritical drying,Photoluminescence
FundProject:国家自然科学基金资助项目(19974041)和国家重大基础研究-纳米材料和纳米结构项目基金资助(19990645-01)
纳米(Y0.95Eu0.05)2O3及其SiO2气凝胶介孔组装体的制备与光致发光
叶长辉,姚连增*,郭辰,牟季美,石刚
摘要:
采用尿素溶胶法合成(Y0.95Eu0.05)2O3纳米粉,用超临界干燥技术制备了n-(Y0.95Eu0.05)2O3/SiO2气凝胶介孔组装体。结果表明,当Y3+∶ Eu3+=20∶ 1,均相反应时间为4h,且经680℃、4h灼烧热处理后得到的n-(Y0.95Eu0.05)2O3中,光致发光强度最大(发光峰位于612nm),以Si与2Y摩尔比为1∶7的n-(Y0.95Eu0.05)2O3/SiO2气凝胶介孔组装体,经同样条件热处理后,光致发光强度达不到n-(Y0.95Eu0.05)2O3的红光发射强度,而
关键词:  气凝胶  介孔组装体  超临界干燥技术  光致发光
DOI:1003-7713/2000/06-0694-05
分类号: