Peculiarities of melting and crystallization of n-decane in a porous glass

A.L. Pirozerski, O.I. Smirnova, A.I. Nedbai, O.L. Pirozerskaya, N.A. Grunina, V.M. Mikushev

Research outputpeer-review

Abstract

Melting and crystallization of n-decane embedded into porous glass with the mean pore size of about 6.4 nm were studied using acoustic and DSC methods. Smearing of the phase transitions, decrease of melting and freezing temperatures, pronounced hysteresis between melting and crystallization were revealed by both methods. In DSC measurements for the pore filling factors 70% and higher double peaks were observed upon cooling while only single peaks were present upon heating. Also a high reduction of the corresponding phase transition heats was revealed. Melting and freezing intervals determined by acoustic and DSC methods strongly differed from each other. A model which qualitatively explains the observed anomalies is proposed. It supposes the formation of liquid layers on the surface of the pores.

Original languageEnglish
Article number125872
Number of pages7
JournalPhysics Letters A
Volume383
Issue number30
Early online date7 Aug 2019
DOIs
Publication statusPublished - 25 Oct 2019

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melting
crystallization
glass
porosity
freezing
acoustics
hysteresis
anomalies
intervals
cooling
heat
heating
liquids
temperature

Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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title = "Peculiarities of melting and crystallization of n-decane in a porous glass",
abstract = "Melting and crystallization of n-decane embedded into porous glass with the mean pore size of about 6.4 nm were studied using acoustic and DSC methods. Smearing of the phase transitions, decrease of melting and freezing temperatures, pronounced hysteresis between melting and crystallization were revealed by both methods. In DSC measurements for the pore filling factors 70{\%} and higher double peaks were observed upon cooling while only single peaks were present upon heating. Also a high reduction of the corresponding phase transition heats was revealed. Melting and freezing intervals determined by acoustic and DSC methods strongly differed from each other. A model which qualitatively explains the observed anomalies is proposed. It supposes the formation of liquid layers on the surface of the pores.",
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Peculiarities of melting and crystallization of n-decane in a porous glass. / Pirozerski, A.L.; Smirnova, O.I.; Nedbai, A.I.; Pirozerskaya, O.L.; Grunina, N.A.; Mikushev, V.M.

In: Physics Letters A, Vol. 383, No. 30, 125872, 25.10.2019.

Research outputpeer-review

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AU - Pirozerski, A.L.

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AU - Pirozerskaya, O.L.

AU - Grunina, N.A.

AU - Mikushev, V.M.

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AB - Melting and crystallization of n-decane embedded into porous glass with the mean pore size of about 6.4 nm were studied using acoustic and DSC methods. Smearing of the phase transitions, decrease of melting and freezing temperatures, pronounced hysteresis between melting and crystallization were revealed by both methods. In DSC measurements for the pore filling factors 70% and higher double peaks were observed upon cooling while only single peaks were present upon heating. Also a high reduction of the corresponding phase transition heats was revealed. Melting and freezing intervals determined by acoustic and DSC methods strongly differed from each other. A model which qualitatively explains the observed anomalies is proposed. It supposes the formation of liquid layers on the surface of the pores.

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