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《水泥基发光材料的发光特性与微观形貌-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第37卷第3期南昌大学学报(理科版)Vo1.37NO.32013年6月JournalofNanchangUniversity(NaturalScience)Jun.2013文章编号:1006—0464(2013)03—0277—04水泥基发光材料的发光特性与微观形貌王信刚,叶栩娜,章未琴,陈方斌,鲁赘龙(南昌大学建筑工程学院,江西南昌330031)摘要:以水泥为基体材料,利用稀土发光材料、反光材料制备出水泥基发光材料(LuminescentCementitiousMate—rials,简称LCM),采用强度试验、荧光分光光度计、亮度计、ESEM等测试手段研究LCM的抗折和抗压
2、强度、发光亮度和余辉时间以及微观形貌。结果表明,在发光粉掺量15~45%、反光粉掺量0~25范围内,LCM的28d抗折强度和抗压强度分别在6.5~8.0MPa和40~55MPa之间;随着发光粉掺量的增加,LCM的发光亮度增大,特别是对初始发光亮度有较大影响,随着反光粉掺量的增加,LCM的的余辉时间延长;LCM在太阳光照1h后的初始发光亮度、余辉时间均比在4OW日光灯照5h后的好;LCM中发光粉、反光粉均不参与水化反应,发光粉与水泥水化产物胶结,反光粉被水泥水化产物包裹,共同形成比较致密的结构。建议LCM中发光粉的掺量为l5%~25,反光粉的掺量为0~15。关键词:水泥基材料;
3、强度;发光;微观形貌中图分类号:TU528文献标志码:ALuminescentpropertiesandmicromorphologyofluminescentcementitiousmaterialsWANGXingang,YEXuna,ZHANGWeiqin,CHENFangbin,LUYunlong(SchoolofCivilEngineeringandArchitecture,NanchangUniversity,Nanchang330031,China)Abstract:LuminescentCementitiousMaterials(abbr.LCM)werepr
4、eparedwithcementasbinderandrareearthluminescentpowderandreflectivepowderasaddmixrures.Flexuralstrength,compressivestrength,luminescentbrightness,afterglowtime,andmicromorphologyofLCMwerestudiedbymeansofstrengthtests,fluorescencespectrophotometer,luminancemeterandESEM.Resultsshowthatwhenthed
5、osageofluminescentpowderare15一45andthedosageofreflectivepowderare0一25,flexuralstrengthandcompressivestrengthofLCMat28daysare6.5MPa一8.0MPaand40MPa一55MPa,respectively.LuminescentbrightnessofLCMisincreasedwithincreasingluminescentpowderdosage,especiallyinitialluminescentbrightness,andafterglow
6、timeofLCMisprolongedwithincreasingreflectivepowderdosage.Luminescentbrightnessandafterglowtimeofdirectsunlightafter1houraresuperiortothoseof40Wflu—orescentlampafter5hours.Luminescentpowderandreflectivepowderarenotparticipateinhydrationre—action,luminescentpowdergluescementhydrationproduct,r
7、eflectivepowderwaswrappedbycementhy—drationproduct,whichtogetherformmoredensestructure.Itwassuggestedthatthedosageofluminescentpowdershouldbe15一45andthedosageofreflectivepowdershouldbe0一25.Keywords:cementitiousmaterials;strength;luminescent;micromorpholo
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