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MN2 DOPED ZN2SIO4 PHOSPHORS WERE SYNTHESIZED BY SOL-GEL METHOD, AND THE INFLUENCE OF ZINC SOURCE. MN2 DOPANT CONCENTRATION AND ANNEALING TEMPERATURE WERE INVESTIGATED. RESULTS SHOW THAT ZINC NITRATE BASED PRECURSOR WITH STRONG GREEN EMISSION INTENSITIES IS BETTER THAN ZINC ACETATE BASED PRECURSOR. THE INTENSITY OF GREEN LIGHT EMISSION REACHES A PEAK AT 254 NM WHEN THE MN2 DOPANT CONCENTRATION IS ABOUT 5%( MOLAR PERCENTAGE). STRUCTURAL DETAILS OF THE PHOSPHORS WERE EXAMINED THROUGH X-RAY DIFFRACTOMETRY. THERMOGRAVIMETRIC AND DIFFERENTIAL THERMAL ANALYSIS. THE RESULT INDICATES THAT THEY ARE BOTH RHOMBOHEDRAL STRUCTURES, WHICH REMAIN AMORPHOUS BELOW 700 ℃ AND CRYSTALLIZE COMPLETELY AROUND 1 000 ℃. THE LUMINESCENT PROPERTIES OF ZN:SIO4/MN2 PHOSPHORS WERE CHARACTERIZED BY EXCITATION AND EMISSION SPECTRA. 相似文献
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2007年9月,教育部公布了首批21个全国高校辅导员培训和研修基地,由此,基地建设工作全面启动。辅导员培训和研修基地除承担培训任务外,还要承担专题研究的任务,为教育部门制定相关政策提供决策咨询,努力成为加强辅导员队伍建设及大学生思想政治教育的智慧库。在河南省,郑州大学成为全国首批高校辅导员培训和研究基地的建设单位,到目前为止,郑州大学基地已经成功举办了6期培训,取得了良好的效果。本期"辅导员·关注"特别选取了关于"辅导员培训班"的一组文章,您不妨先随着郑州大学辅导员培训基地师资专家库成员葛坤英教授、培训基地负责人戴国立、辅导员付晓丽的视线走进培训班、了解培训班,相信不久的将来,您也会成为培训班的一员。 相似文献
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