The Effect of Substituting Ga for Alon Crystal Structure of Phosphors MAl 2Si2O8: Eu2+ (M= Ca, Sr, Ba)

Fei Wang; Hui Hui Chen; Shi Wei Zhang

doi:10.4028/www.scientific.net/KEM.905.91

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The Effect of Substituting Ga for Alon Crystal Structure of Phosphors MAl ₂Si₂O₈: Eu²⁺ (M= Ca, Sr, Ba)

Abstract:

A series of luminescence phosphors M_0.955Al_{2 –x}Ga_xSi₂O₈∶Eu²⁺ (M=Ca, Sr, Ba, x = 0~1.0) were prepared via solid-state reaction in weak reductive atmosphere. The lattice positions were discussed. It was found that when Ga³⁺ entered MAl₂Si₂O₈ lattice and substituted Al³⁺, complete solid solutions formed. The lattice parameters (a, b, c) and unit cell volume of phosphors M _0.955Al_{2 –x}Ga_xSi₂O₈: Eu²⁺ (M=Ca, Sr, Ba, x = 0~1.0) increased linearly, the lattice parameters (α, β,γ) of Ca_0.955Al_2–xGa_xSi₂O₈∶Eu²⁺(CAS) decreased linearly and the lattice parameter β of Sr_0.955Al_2–xGa_xSi₂O₈∶Eu²⁺(SAS) and Ba_0.955Al_2–xGa_xSi₂O₈∶Eu²⁺(BAS) increased linearly as Ga³⁺ content increased.