Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 2, Issue 46, Pages 10002-10010Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4tc02081b
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Funding
- French ANR [CrystOG ANR-12-JS08-0002-01]
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Highly transparent ZnGa2O4 glass-ceramic materials are elaborated via a simple heat treatment of a 55SiO(2)-5Na(2)O-17ZnO-23Ga(2)O(3) parent glass composition, which presents nanoscale spinodal phase separation. This optimized glass-ceramic exhibits 50 wt% of ZnGa2O4 nanocrystals showing a homogeneous and tuneable size. To describe the crystallization process, the glass and glass-ceramic nanostructures are studied by high resolution scanning transmission electron microscopy analysis coupled with in situ high temperature X-ray diffraction and optical measurements. From these results, an original mechanism is proposed to explain the crystallization process occurring in a spinodal phase separated glass. Remarkably, red long-lasting luminescence arising from the entire sample volume is observed in the Cr3+ doped transparent glass-ceramics, opening the route to a wider range of performing applications for this famous zinc gallate persistent phosphor.
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