MF_2-MgF_2(M=Ca,Sr,Ba)体系中钐离子的价态及光谱  

VALENCY AND SPECTRAL CHARACTERISTICS OF SAMARIUM IONS IN MMgF_4(M = Ca,Sr,Ba) SYSTEM

作　　者：曹志成[1] 石春山[1] 

机构地区：[1]中国科学院长春应用化学研究所希土化学与物理开放实验室,长春130022

出　　处：《无机化学学报》1993年第2期150-154,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目

摘　　要：高温固相反应合成了钐离子激活的MF_2-MgF_2磷光体,考察了合成条件及基质组成对钐离子价态的影响,并讨论了荧光光谱与基质及钐离子价态间的关系.The phosphors MMgF4(M = Ca, Sr, Ba) doped with samarium ions were synthesized in H2 steam, Ar steam and in air, respectively. Reaction conditions affect the valency of samarium ions. When the samples were synthesized in H2 steam, the emission spectrum of Sm2+ ions were observed in BaMgF4; the emission spectra of both Sm2+ and Sm3+ ions were observed in SrMgF4, but only the emission of Sm3+ions was observed in CaMgF4. Experiments indicate that the stability of divalent samarium ions has bearing on the compositions of matrixes, it is to say that the radius and the ratio of charge-radius of substituted cations are very important factors to affect the variety of valency of samarium ions.

关 键 词：钐离子 荧光光谱 复合氟化物 

分 类 号：O614.337[理学—无机化学]