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研究了基质结构与离子半径的形成关系和Ｅｕ２＋在同时形成的多相体系中的发光现象．在ＭＭｇＡｌ１０Ｏ１７体系中，当Ｍ离子半径小于０．１０ｎｍ时，体系形成多相共存．首次观察到在磁铅矿、尖晶石和α－Ａｌ２Ｏ３三相同时共存体系中，Ｅｕ２＋优先占据离子半径和电荷与之匹配的磁铅矿中的Ｃａ２＋离子格位，不进入尖晶石和α－Ａｌ２Ｏ３晶相中的Ｍｇ２＋、Ａｌ３＋离子格位，仅产生Ｅｕ２＋的ｄ→ｆ跃迁宽带发射，且观察不到Ｅｕ３＋的特征光谱；在尖晶石和α－Ａｌ２Ｏ３两相同时共存体系中，Ｅｕ２＋可进入尖晶石和α－Ａｌ２Ｏ３晶相中的Ｍｇ２＋、Ａｌ３＋离子格位，分别产生Ｅｕ２＋的ｄ→ｆ和ｆ→ｆ跃迁发射，同时还观察到相当强的Ｅｕ３＋的特征光谱；在α－Ａｌ２Ｏ３单一相中，Ｅｕ２＋产生ｆ→ｆ跃迁发射，并观察到明显的Ｅｕ３＋的特征光谱，在α－Ａｌ２Ｏ３与γ－Ａｌ２Ｏ３同时存在的混合相中，Ｅｕ２＋的ｆ→ｆ跃迁发射消失，产生新的ｄ→ｆ跃迁宽带发射
The relationship between the matrix structure and the ionic radius and the luminescence of Eu2 + in a multiphase system formed simultaneously were studied. In MMgAl10O17 system, when the radius of M ions is less than 0.10nm, the system forms multiphase coexistence. It is observed for the first time that Eu2 + preferentially occupies the Ca2 + ion lattice in the magnetite with its ionic radius and charge matched in the simultaneous coexistence system of magnetite, spinel and α-Al2O3, and does not enter the spinel and α-Al2O3 In the crystal phase, Mg2 + and Al3 + ion sites only produce Eu2 + d → f transition broadband emission, and the characteristic spectrum of Eu3 + is not observed. In the coexistence system of spinel and α-Al2O3 two phases, Eu2 + And the lattice sites of Mg2 + and Al3 + ions in the α-Al2O3 crystal phase, respectively, resulting in the d → f and f → f transition emission of Eu2 + and the strong characteristic spectrum of Eu3 +. In the α-Al2O3 single phase, Eu2 + The f → f transition emission was observed and the characteristic spectrum of Eu3 + was observed. The f → f transition emission of Eu2 + disappeared in the mixed phase where α-Al2O3 and γ-Al2O3 coexist, resulting in a new d → f transition broadband emission