Transparent Eu3+ doped oxyapatite glass ceramics: Crystallization kinetics, structural and optical properties
Source abstract
Abstract
Transparent Eu 3+ -doped oxyapatite glass ceramics (GC) have been prepared. A mean crystallization activation energy of 389.58 kJ/mol is determined in crystallization kinetics study. The Avrami`s parameter is evaluated to be 2.65, indicating that bulk crystallization is the dominant mechanism. Effect of Eu 2O 3 dopant on the crystallization behavior was discussed. The precipitation of oxyapatite nanocrystals exhibiting a slight lattice contraction in glass is confirmed by X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements, resulting from the partition of some europium ions into crystals. Photoluminescence analysis reveals that crystallization could promote the oxidation of Eu 2+ to Eu 3+ possibly due to europium ions partition on La 3+ lattice sites. Temperature-dependent photoluminescence spectra indicate that such oxyapatite GC phosphor exhibits excellent thermal stability with an activation energy of 0.326 eV. This study reports the possibility of developing oxyapatite GC phosphor for light conversion application.
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Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Glass properties and applications · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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