Journal of Thermal Analysis and Calorimetry, volume 131, issue 2, pages 1155-1164
Thermal expansion, heat capacity and phase transformations in nanocrystalline and coarse-crystalline silver sulfide at 290–970 K
Publication type: Journal Article
Publication date: 2017-09-18
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 4.4
ISSN: 13886150, 15882926, 03684466, 15728943, 14182874
Physical and Theoretical Chemistry
Condensed Matter Physics
Abstract
The temperature dependences of the thermal expansion coefficient and heat capacity of nanocrystalline and coarse-crystalline silver sulfide Ag2S have been studied using dilatometry and differential scanning calorimetry. When the temperature increases from 290 to 970 K, the phase transformations “acanthite α-Ag2S ⇔ argentite β-Ag2S” and “argentite β-Ag2S ⇔ γ-Ag2S phase” occur sequentially in the silver sulfide. The thermal expansion coefficient α and heat capacity C p of α-Ag2S, β-Ag2S and γ-Ag2S phases in nanocrystalline state (with particle size ≤60–70 nm) in the temperature regions of existence of these phases are larger than α and C p of the same phases in coarse-crystalline state (with particle size ≥400 nm). It is shown that the heat capacity and the thermal expansion coefficient of nanocrystalline silver sulfide Ag2S contain an additional positive contribution due to the restriction of the phonon spectrum on the side of low and high frequencies caused by a small particle size. It is established that the acanthite α-Ag2S to argentite β-Ag2S and argentite β-Ag2S to γ-Ag2S phase transformations are the first-order phase transitions, and the temperatures and enthalpies of these transformations have been determined.
Top-30
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Citations by publishers
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1 publication, 3.85%
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1 publication, 3.85%
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Wuhan University of Technology
1 publication, 3.85%
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Sadovnikov S. I., Gusev A. Thermal expansion, heat capacity and phase transformations in nanocrystalline and coarse-crystalline silver sulfide at 290–970 K // Journal of Thermal Analysis and Calorimetry. 2017. Vol. 131. No. 2. pp. 1155-1164.
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Sadovnikov S. I., Gusev A. Thermal expansion, heat capacity and phase transformations in nanocrystalline and coarse-crystalline silver sulfide at 290–970 K // Journal of Thermal Analysis and Calorimetry. 2017. Vol. 131. No. 2. pp. 1155-1164.
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TY - JOUR
DO - 10.1007/s10973-017-6691-8
UR - https://doi.org/10.1007/s10973-017-6691-8
TI - Thermal expansion, heat capacity and phase transformations in nanocrystalline and coarse-crystalline silver sulfide at 290–970 K
T2 - Journal of Thermal Analysis and Calorimetry
AU - Sadovnikov, S. I.
AU - Gusev, A.I
PY - 2017
DA - 2017/09/18 00:00:00
PB - Springer Nature
SP - 1155-1164
IS - 2
VL - 131
SN - 1388-6150
SN - 1588-2926
SN - 0368-4466
SN - 1572-8943
SN - 1418-2874
ER -
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@article{2017_Sadovnikov,
author = {S. I. Sadovnikov and A.I Gusev},
title = {Thermal expansion, heat capacity and phase transformations in nanocrystalline and coarse-crystalline silver sulfide at 290–970 K},
journal = {Journal of Thermal Analysis and Calorimetry},
year = {2017},
volume = {131},
publisher = {Springer Nature},
month = {sep},
url = {https://doi.org/10.1007/s10973-017-6691-8},
number = {2},
pages = {1155--1164},
doi = {10.1007/s10973-017-6691-8}
}
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Sadovnikov, S. I., and A.I Gusev. “Thermal expansion, heat capacity and phase transformations in nanocrystalline and coarse-crystalline silver sulfide at 290–970 K.” Journal of Thermal Analysis and Calorimetry, vol. 131, no. 2, Sep. 2017, pp. 1155-1164. https://doi.org/10.1007/s10973-017-6691-8.