简介:Heterogeneousprecipitationmethodwasusedtopreparedsurfacecoatingonself-madeBaMgAl10O17:Euphosphor.Resultsillustratethatthecoatingfilmcanbesilicondioxideinamorphousstatewith50nminthickness.Photoluminescenceresultsindicatethatthecoatinglayerpresentsanobservableimprovedeffectontheenhancementofthermalstability.Whenbakedat600℃for1h,theluminanceofcoatedBAMkeepsat92%higherthanthatofuncoatedBAMby23%.ThisprotectiveeffectcanbeattributedtothehighcompactdegreeanduniformityofthisamorphousSiO2coatingfilmwhichisservedasadiffusionblocklayertoinbreakoxygenatom,thusreleasestheoxidationextentofEu2+effectively.
简介:有一般公式的1,10-phenanthroline(phen)的铈,镨和钕的硝酸盐建筑群[行(phen)2(NO3)2(H2O)2]·NO3(在哪儿,Ln=Ce,Pr和Nd)被X光检查晶体学准备并且描绘。这些建筑群的Thermolysis被同时的thermogravimetry(TG)和微分热分析(DTA)调查。等温的TG被拿用模型适合评估运动参数以及为免费isoconversional方法建模。thermolytic小径也被建议,它包含点火跟随的分解。所有三建筑群有第十期协作并且显示出multistep分解。以便评估快速的加热的反应,点火延期(Di)大小被承担。为点火的激活精力被发现在顺序减少:Nd>Pr>Ce。