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本文研究掺Mn~(2+)的(1-x)CeMgAl_(11)O_(1■)-xSrAl_(12)O_(1■)系列固溶体的发光性质.在0≤x<1范围内,发射光谱由三个带组成:315～350nm的UV发射带;516nm的绿色发射带和620～690nm的红色发射带.UV带为Ce~(■+)发射,随x增加,发射波长短移.绿色发射带为四配位Mn~(2+)(标为Mn~(2+)(g))发射,最可能的Mn~(2+)(g)格位为4fAl(2)格位.红色带为六配位Mn~(2+)(标为Mn~(2+)+(r))发射.这种红色发射在SrAl_(12)O_(19):Mn~(2+)中并不存在,说明该发射是由组成CeMgAl_(11)O_(19)所决定的,因此排为“12K”格位.Mn~(2+)(g)和Mn~(2+)(r)都可经过Ce~(■+)得到激发;而且,随着Mn~(2+)量增加,Mn~(2+)(g)发射增强,Ce~(■+)发射减弱,Mn~(2+)(r)发射略有降低.Mn~(2+)浓度由0.01增大到0.2(重量百分浓度),Mn~(2+)
In this paper, the luminescent properties of (1-x) CeMgAl_ (11) O_ (1_) -xSrAl_ (12) O_ (1_) series solid solutions doped with Mn ~ (2+) The spectrum is composed of three bands: a UV emission band of 315-350 nm, a green emission band of 516 nm and a red emission band of 620-690 nm. The UV band is emitted by Ce ~ (■ +) with a shortened emission wavelength as x increases The emission band emits for the fourth coordination Mn ~ (2 +) (labeled Mn ~ (2 +) (g)), and the most probable Mn ~ (2 +) The band is emitted by the six coordinate Mn ~ (2 +) (labeled as Mn ~ (2 +) + (r)) .The red emission is not in SrAl 12 O 19: Mn 2+ Indicating that the emission is determined by the composition CeMgAl_ (11) O_ (19), and therefore it is arranged in the “12K” lattice position. Both Mn2 + and Mn2 + (2 +) (g) emission and Ce ~ (+) emission decrease with the increase of Mn ~ (2+) (r) emission decreased slightly.Mn ~ (2+) concentration increased from 0.01 to 0.2 (wt%), Mn ~ (2+)