Abstract
Using conventional melt-quenching and subsequent thermal treatment, doped transparent glass ceramic (GC) was prepared. X-ray diffraction and high-resolution transmission electron microscopy confirmed the formation and microstructure of nanocrystals in glass. An energy-dispersive spectrometer was used to investigate the distribution of ions and nanocrystals in glass. It was found that ions prefer to concentrate in the nanocrystals rather than in a glass matrix, and the amount of ions plays a key role in the formation of nanocrystals in a glass matrix with the ions as nucleating agent. An intense 2.7 μm emission due to : was achieved upon excitation at 980 nm with a laser diode, while the 2.7 μm emission can be neglected in the as-prepared glass counterpart, which confirmed the incorporation of ions into nanocrystals. An obvious enhancement of 2.7 μm emerged in the GC doped with 3% and heat-treated at 620°C.
© 2013 Optical Society of America
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