%0 Journal Article
%T 钙钛矿结构荧光材料mzro3:eu3+,a(m=ca2+,ba2+;a=li+,na+,k+)？的制备及其发光性质
%A marí
%A b.
%A cembrero-coca
%A p.
%A singh
%A k.
%A c.
%A kaushik
%A r.
%A d.
%A om
%A hari
%J 物理化学学报
%D 2013
%X calciumandbariumzirconatepowdersbaseduponcazro3:eu3+,aandbazro3:eu3+,a(a=li+,na+,k+)werepreparedbycombustionsynthesismethodandheatingto~1000℃toimprovecrystallinity.thestructureandmorphologyofmaterialswereexaminedbyx-raydiffraction(xrd)andscanningelectronmicroscopy(sem).xrdresultsshowedthatcazro3:eu3+,aandbazro3:eu3+,a(a=li+,na+,k+)perovskitespossessedorthorhombicandcubicstructures,respectively.themorphologiesofallpowderswereverysimilarconsistingofsmall,coagulated,cubicalparticleswithnarrowsizedistributionsandsmoothandregularsurfaces.thecharacteristicluminescencesofeu3+ionsincazro3:eu3+,a(a=li+,na+,k+)latticeswerepresentwithstrongemissionsat614and625nmfor5d0→7f2transitionswithotherweakeremissionsobservedat575,592,655,and701nmcorrespondingto5d0→7fntransitions(wheren=0,1,3,4respectively).inbazro3:eu3+boththe5d0→7f1and5d0→7f2transitionsat595and613nmwerestrong.photoluminescenceintensitiesofcazro3:eu3+sampleswerehigherthanthoseofbazro3:eu3+lattices.thisremarkableincreaseofphotoluminescenceintensity(correspondingto5d0→7fntransitions)wasobservedincazro3:eu3+andbazro3:eu3+ifco-dopedwithli+ions.anadditionalbroadbandcomposedofmanypeaksbetween440to575nmwasobservedinbazro3:eu3+,,asamples.theintensityofthisbandwasgreatestinli+co-dopedsamplesandlowestfork+dopedsamples.
%K cazro3:eu3+
%K aandbazro3:eu3+
%K a(a=li+
%K na+
%K k+)
%K chargecompensator
%K combustionsynthesis
%K photoluminescence
%U http://www.whxb.pku.edu.cn/CN/abstract/abstract28434.shtml