Preparation of Phosphors MBPO5: Eu2+ and MBPO5: Yb2+ in Air

Abstract

Abstract: MBPO5: RE²⁺ (M = Ca, Sr, Ba; RE= Eu, Yb) were synthesized with RE₂O₃,H₃BO₃, (NH₄)₂HPO₄ and MCO₃ as the starting materials in air, instead of preparing them inH₂/N₂ atmosphere. The peaks in their excitation and emission fluorescence spectra as well ashalf-widths of emission were measured. The results show that it is possible to preparedivalent Eu and Yb ions activated phosphors in air, if the crystal structure of the matrix enablesthese divalent ions to be stable in the light of its geometric factors and if the matrix itselfenables reducing trivalent Eu and Yb to be divalent.

Key words: Alkaline-earth borophosphate, Europium, Ytterbium, Phosphor, Fluorescence

CLC Number:

O616

TrendMD:

JING Hai-Qiang, WU Guo-Qing, DU Bao-Shi . Preparation of Phosphors MBPO5: Eu²⁺ and MBPO5: Yb²⁺ in Air[J]. Chem. J. Chinese Universities, 1997, 18(9): 1425.

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Preparation of Phosphors MBPO5: Eu²⁺ and MBPO5: Yb²⁺ in Air

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