Effects of Various Fluxes on Synthesis of Deep Red Emitting CaAl₁₂O₁₉:Mn⁴⁺ Phosphors

Abstract:

Deep red emitting CaAl_12-xO₁₉:xMn⁴⁺ phosphors were synthesized by solid state reaction method. Various fluxes (BaF₂, H₃BO₃, Na₂CO₃ and NH₄Cl) were added in preparation of the phosphors. The influences of the various fluxes on the crystal structure, morphology and luminescent properties of CaAl₁₂O₁₉:Mn⁴⁺ phosphors were studied. The results show that the obtained phosphors with fluxes possessed better luminescent intensity than that of the phosphors without fluxes. The maximum luminescent intensities were found with the following order: H₃BO₃ (2.0 wt%) > Na₂CO₃ (0.5 wt%) > NH₄Cl (0.3 wt%) > BaF₂ (0.1 wt%) > no flux. The H₃BO₃ flux can decrease the single phase forming temperature of CaAl₁₂O₁₉:Mn⁴⁺ phosphors by about 150°C.

• Periodical: Materials Science Forum (Volume 852)
• Pages: 454-460
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.852.454
• Online since: April 2016
• Authors: Qiu Hong Zhang, Hai Yong Ni, Ling Li Wang, Fang Ming Xiao
• Keywords: CaAl₁₂O₁₉:Mn⁴⁺, Flux, Iuminescent Properties, Phosphor

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