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In general, glasses have a random structure, but they can take on unique structures due to bond selectivity. In this paper, we introduce the bond selectivity of oxygen- and fluorine-containing glasses and the formation of glass structures derived from the bond selectivity of each anion. We present the relationship between BaMgBO3F crystals and BaF2-MgO-B2O3 glasses. The crystal is composed of oxide and fluoride layers. The corresponding glass is suggested to have a bicontinuous structure from structural analysis and simulation. The glass has a favorable structure for luminescence and shows higher luminescence efficiency than the corresponding crystal. Such a structure is also favorable for nucleation; the BaF2-ZnO-B2O3 glass precipitated fluoride crystals with a very small particle size distribution at 5 nm upon heat treatment. Various structural analyses suggest that the fluoride sites in the fluoride-rich domain of this glass structure are similar to the crystals. This paper suggests that various functionalities can be developed by utilizing the mixing heterogeneity derived from the selective binding of fluoride and oxide. [ABSTRACT FROM AUTHOR]

In this study, the properties of Ce3+-doped Y3Al5O12 (YAG:Ce3+) phosphors for white light emitting diodes by mechanical method was evaluated. The YAG:Ce3+ phosphors were synthesized by the mechanical method using an attrition-type mill without any extra-heat assistance. BaF2, YF3 and Al(OH)3 was used as an additive for its lower temperature reaction, respectively. The synthesis of YAG:Ce3+ phosphor was favorably achieved after 10-30 min by mechanical processing with the addition of each additive. As a result, it was made clear that the quantum yield of phosphor was well related to the crystallite size of the sample regardless of the kind of additives. The absorption rate of YAG phosphors were also well related to its median diameter. Both relationships almost agreed to those obtained for the YAG:Ce3+ phosphors synthesized by solid reaction method. It was suggested that the increase of crystallite size and median size of the sample synthesized by mechanical method is key issue to achieving higher quality of YAG:Ce3+ phosphor. [ABSTRACT FROM AUTHOR]