Abstract
This paper focuses on the effects of Ga2O3/GeO2 ratios and heat treatment on the structure, crystallization and fluorescence properties of Gd2O3-Ga2O3-GeO2-Nd2O3 glass system. According to the results, the glass network's structural stability suffers when the ratio of Ga2O3/GeO2 is low. As the ratio of Ga2O3/GeO2 continues to increase, Ga3+ ions are transformed into [GaO4] to participate in the construction of the glass network structure. The principal phase of glass-ceramics is GdGaGe2O7, and the secondary phase is Ga4GeO8, GeO2 and Gd3Ga5O12. Moreover, the glasses with high content of Ga2O3 is easier to prepare translucent glass-ceramics with uniform grain distribution and size. The emission spectrum intensity of glass-ceramics is obviously improved compared with that of glasses. In addition, it is found that the emission peak of Nd3+ ions generated by 4F3/2 → 4I11/2 electron transition is stably redshifted from 1060 nm to 1088 nm by microcrystallization, which means a small range of spectrum is adjustable.
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