Calculations of Avrami exponent and applicability of Johnson-Mehl-Avrami model on crystallization in Er:LiY(PO.sub.3./sub.).sub.4./sub. phosphate glass

0536253 - FZÚ 2021 RIV HU eng J - Journal Article
Zemenová, Petra - Král, Robert - Rodová, Miroslava - Nitsch, Karel - Nikl, Martin
Calculations of Avrami exponent and applicability of Johnson-Mehl-Avrami model on crystallization in Er:LiY(PO₃)₄ phosphate glass.
Journal of Thermal Analysis and Calorimetry. Roč. 141, č. 3 (2020), s. 1091-1099. ISSN 1388-6150. E-ISSN 1588-2926
R&D Projects: GA MŠMT EF16_013/0001406; GA MŠMT(CZ) LO1409; GA MŠMT(CZ) LM2015088
Grant - others:OP VVV - SAFMAT(XE) CZ.02.1.01/0.0/0.0/16_013/0001406
Institutional support: RVO:68378271
Keywords : phosphate glass * nucleation * crystallization * DSC * Avrami exponent * JMA model
OECD category: Materials engineering
Impact factor: 4.626, year: 2020
Method of publishing: Limited access
https://doi.org/10.1007/s10973-019-09068-w

Preparation and thermal properties of Er3+- doped lithium–yttrium meta-phosphate glasses with a nominal composition of Er:LiY(PO3)4 were studied as a new scintillating material for neutron detection. The glassy Er:LiY(PO3)4 ingots 10 × 10 × 25 mm3 in size were prepared by quenching of the molten mixture of the starting lithium carbonate, yttrium phosphate, and phosphorus oxide in stoichiometric relations. Crystallization kinetics was experimentally studied on powder samples with particle sizes ranging from 96 to 106 μm, 200 to 212 μm, and on bulk glassy samples using the non-isothermal differential scanning calorimetry. The evaluation of the measured data was performed using the Johnson–Mehl–Avrami, Matusita and Augis–Bennett models, and the y(α) and z(α) functions. Obtained kinetic parameters were used for reconstruction of the crystallization peaks using various models and compared with actual experimental data.
Permanent Link: http://hdl.handle.net/11104/0314065