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Heat capacities of crystalline and glassy lithium metaphosphate up to the transition region

Tutkimustuotosvertaisarvioitu

Standard

Heat capacities of crystalline and glassy lithium metaphosphate up to the transition region. / Rocherullé, J.; Massera, J.; Oudadesse, H.; Calvez, L.; Trolès, J.; Zhang, X. H.

julkaisussa: Journal of Thermal Analysis and Calorimetry, Vuosikerta 123, Nro 1, 2016, s. 401-407.

Tutkimustuotosvertaisarvioitu

Harvard

Rocherullé, J, Massera, J, Oudadesse, H, Calvez, L, Trolès, J & Zhang, XH 2016, 'Heat capacities of crystalline and glassy lithium metaphosphate up to the transition region', Journal of Thermal Analysis and Calorimetry, Vuosikerta. 123, Nro 1, Sivut 401-407. https://doi.org/10.1007/s10973-015-4938-9

APA

Rocherullé, J., Massera, J., Oudadesse, H., Calvez, L., Trolès, J., & Zhang, X. H. (2016). Heat capacities of crystalline and glassy lithium metaphosphate up to the transition region. Journal of Thermal Analysis and Calorimetry, 123(1), 401-407. https://doi.org/10.1007/s10973-015-4938-9

Vancouver

Rocherullé J, Massera J, Oudadesse H, Calvez L, Trolès J, Zhang XH. Heat capacities of crystalline and glassy lithium metaphosphate up to the transition region. Journal of Thermal Analysis and Calorimetry. 2016;123(1):401-407. https://doi.org/10.1007/s10973-015-4938-9

Author

Rocherullé, J. ; Massera, J. ; Oudadesse, H. ; Calvez, L. ; Trolès, J. ; Zhang, X. H. / Heat capacities of crystalline and glassy lithium metaphosphate up to the transition region. Julkaisussa: Journal of Thermal Analysis and Calorimetry. 2016 ; Vuosikerta 123, Nro 1. Sivut 401-407.

Bibtex - Lataa

@article{0692316f27f14dbdb15cae404c6f95b1,
title = "Heat capacities of crystalline and glassy lithium metaphosphate up to the transition region",
abstract = "Heat capacity measurements have been conducted by means of DSC on both crystalline and glassy lithium metaphosphate, from room temperature up to the melting region. The heat capacity of the glass is slightly higher than that of the crystal. Contrary to the crystal, in the neighborhood of T g, C p increases rapidly by 10 J mol−1 K−1 conferring to this glass a “fragile character.” Nevertheless, the passage through T m does not show any discontinuity and the values of the glass and of the crystal are identical. The Debye model appears to be realistic to describe the glass heat capacity to temperature dependence. The Debye temperature and frequency were determined by minimizing the R p and χ 2 parameters of the C v fitting curve. From the calculation of the entropy of the liquid at T > T m, the excess entropy of the glass at T g was determined. Using the dependence of the glass transition on the heating rate, we calculated the values of the activation energy for structural relaxation (E relax) and of the lower limit of the glass transition temperature (T∘g) which is a thermodynamic parameter, contrary to T g which is a kinetic parameter.",
keywords = "Crystal, Glass, Glass transition, Heat capacity",
author = "J. Rocherull{\'e} and J. Massera and H. Oudadesse and L. Calvez and J. Trol{\`e}s and Zhang, {X. H.}",
year = "2016",
doi = "10.1007/s10973-015-4938-9",
language = "English",
volume = "123",
pages = "401--407",
journal = "Journal of Thermal Analysis and Calorimetry",
issn = "1388-6150",
publisher = "Akad{\'e}miai Kiad{\'o}",
number = "1",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Heat capacities of crystalline and glassy lithium metaphosphate up to the transition region

AU - Rocherullé, J.

AU - Massera, J.

AU - Oudadesse, H.

AU - Calvez, L.

AU - Trolès, J.

AU - Zhang, X. H.

PY - 2016

Y1 - 2016

N2 - Heat capacity measurements have been conducted by means of DSC on both crystalline and glassy lithium metaphosphate, from room temperature up to the melting region. The heat capacity of the glass is slightly higher than that of the crystal. Contrary to the crystal, in the neighborhood of T g, C p increases rapidly by 10 J mol−1 K−1 conferring to this glass a “fragile character.” Nevertheless, the passage through T m does not show any discontinuity and the values of the glass and of the crystal are identical. The Debye model appears to be realistic to describe the glass heat capacity to temperature dependence. The Debye temperature and frequency were determined by minimizing the R p and χ 2 parameters of the C v fitting curve. From the calculation of the entropy of the liquid at T > T m, the excess entropy of the glass at T g was determined. Using the dependence of the glass transition on the heating rate, we calculated the values of the activation energy for structural relaxation (E relax) and of the lower limit of the glass transition temperature (T∘g) which is a thermodynamic parameter, contrary to T g which is a kinetic parameter.

AB - Heat capacity measurements have been conducted by means of DSC on both crystalline and glassy lithium metaphosphate, from room temperature up to the melting region. The heat capacity of the glass is slightly higher than that of the crystal. Contrary to the crystal, in the neighborhood of T g, C p increases rapidly by 10 J mol−1 K−1 conferring to this glass a “fragile character.” Nevertheless, the passage through T m does not show any discontinuity and the values of the glass and of the crystal are identical. The Debye model appears to be realistic to describe the glass heat capacity to temperature dependence. The Debye temperature and frequency were determined by minimizing the R p and χ 2 parameters of the C v fitting curve. From the calculation of the entropy of the liquid at T > T m, the excess entropy of the glass at T g was determined. Using the dependence of the glass transition on the heating rate, we calculated the values of the activation energy for structural relaxation (E relax) and of the lower limit of the glass transition temperature (T∘g) which is a thermodynamic parameter, contrary to T g which is a kinetic parameter.

KW - Crystal

KW - Glass

KW - Glass transition

KW - Heat capacity

U2 - 10.1007/s10973-015-4938-9

DO - 10.1007/s10973-015-4938-9

M3 - Article

VL - 123

SP - 401

EP - 407

JO - Journal of Thermal Analysis and Calorimetry

JF - Journal of Thermal Analysis and Calorimetry

SN - 1388-6150

IS - 1

ER -