简介:Heterogeneousprecipitationmethodwasusedtopreparedsurfacecoatingonself-madeBaMgAl10O17:Euphosphor.Resultsillustratethatthecoatingfilmcanbesilicondioxideinamorphousstatewith50nminthickness.Photoluminescenceresultsindicatethatthecoatinglayerpresentsanobservableimprovedeffectontheenhancementofthermalstability.Whenbakedat600℃for1h,theluminanceofcoatedBAMkeepsat92%higherthanthatofuncoatedBAMby23%.ThisprotectiveeffectcanbeattributedtothehighcompactdegreeanduniformityofthisamorphousSiO2coatingfilmwhichisservedasadiffusionblocklayertoinbreakoxygenatom,thusreleasestheoxidationextentofEu2+effectively.
简介:F17以东矿山1172.5分段的回采工艺原设计为下向六角形高低进路胶结充填采矿法,随着矿山生产能力以及压力的逐年增大,按原六角形高低进路回采工艺,面临着诸如充填对采场进路回采进度限制、不能高效科用大型无轨设备等诸多问题。因此,1172.5分段采场回采工艺调整就显得非常必要。本文综合论述了下向水平进路回采工艺的优点,并对该方案与六角形高低进路回采工艺进行了比较。