Translucent and persistent luminescent SrAl2O4:Eu2+Dy3+ ceramics |
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| Affiliation: | 1. Grupo de Materiais Cerâmicos Avançados, Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil;2. Grupo de Óptica e Nanoscopia (GON), Instituto de Física, Universidade Federal de Alagoas, 57072-900 Maceió, AL, Brazil;3. Center for Optical Materials Science and Engineering Technologies (COMSET) and the Department of Materials Science and Engineering, Clemson University, Clemson, SC 29625, USA;1. College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China;2. Institute of Materials Science and Technology, Chengdu University of Technology, Chengdu 610059, China;3. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, Chengdu 610059, China;1. School of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;2. Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions, Changsha 410082, China;3. Hunan Labour Protection Institute of Nonferrous Metals, Changsha 410014, China;1. Seversk Technological Institute NRNU MEPHI, 65 Kommunistichesky ave., Seversk 636036, Tomsk region, Russia;2. RPE JSC “Technologika”, 303 Portovaya st., Rostov-on-Don 863033, Russia;3. National Research Tomsk Polytechnic University, 30 Lenina ave., Tomsk 634030, Russia;1. Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan;2. Graduate School of Global Environmental Studies, Kyoto University, Kyoto 606-8501, Japan |
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| Abstract: | Ceramics that exhibit persistent luminescence are usually opaque, which limits their utility. In this work, a laser-sintering technique is employed to produce persistent luminescent SrAl2O4:Eu2+Dy3+ ceramics that has enhanced translucency in the visible spectral range. In this technique, a CO2 laser was used as the main heating source for sintering with no atmosphere control employed. The ceramics sintered at a power density of 3.1 W/mm2 yielded homogeneous grain size distributions and transmittance up to 40% in the range of 600–800 nm. Upon sintering in air, the ceramics exhibited the characteristic green emission from the Eu2+ ion, corresponding to the 5d→4f transition (514 nm) and a weak emission from the Eu3+ ion at 614 nm, corresponding to the 5D0→7F2 transition. The valence of europium ions was further studied by the X-ray absorption spectroscopy in the XANES region and those details are reported herein. |
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| Keywords: | Laser-sintering Persistence luminescence Strontium aluminate Translucent ceramics XANES |
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