Nucleation and crystallization behavior of RE - doped tellurite glasses

2nd International Symposium on Fundamental Aspects of Rare-earth Elements Mining and Separation and Modern Materials Engineering

材料科学;物理学

Goncharuk, V.^1,2 ; Mamaev, A.^2 ; Silant'Ev, V.^2 ; Starodubtsev, P.^3 ; Maslennikova, I.^1,2

Far-Eastern Federal University, Sukhanova Str. 8, Vladivostok

690950, Russia^1

Far Eastern Branch of Russian Academy of Sciences, 159 Pr. 100-letiya Vladivostoka, Vladivostok

690022, Russia^2

Pacific S O Makarov Higher Naval School, 6 Per. Kamskyi, Vladivostok

690062, Russia^3

关键词: Bulk glass;    Ceramic formation;    Crystalline phase;    Crystallization behavior;    Glass-forming;    Lead fluoride;    Tellurite glass;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/112/1/012023/pdf
DOI  :  10.1088/1757-899X/112/1/012023

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The microstructure and crystallization of the glasses with composition (100-x-y)TeO2-xPbO•P2O5-yPbF2:zMF3(M= Er, Eu, Nd; x=42.5-30, y=5-30, z=0.5-3.0) were investigated by transmission electron microscopy (TEM) and luminescence methods. It was found that the doping with the rare-earth (III) fluorides promoted nucleation in the bulk glasses. The sizes of generated particles are about 2-5 nanometers and their shapes are close to spherical. The growth rate of crystallites depended on the lead fluoride content and glass forming rate. The heat treatment of the samples promotes the glass ceramic formation, where the crystalline phase is Pb2P2O7.