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Indexed by:期刊论文

Date of Publication:2014-03-14

Journal:MATERIALS CHEMISTRY AND PHYSICS

Included Journals:SCIE、EI、Scopus

Volume:144

Issue:1-2

Page Number:162-167

ISSN No.:0254-0584

Key Words:Composite material; Sol-gel growth; Phase transition; Thermal conductivity

Abstract:The thermal conductivity of form-stable PEG/SiO2 phase change material (PCM) was enhanced by in situ doping of Al2O3 using an ultrasound-assisted sol-gel method. Fourier transform infrared spectroscopy (FT-IR) was used to characterize the structure, and the crystal performance was characterized by the X-ray diffraction (XRD). Differential scanning calorimetry (DSC) and thermogravimetric analyzer (TGA) were used to determine the thermal properties. The phase change enthalpy of PEG/SiO2-Al2O3 reached 124J g(-1), and thermal conductivity improved by 12.8% for 3.3 wt% Al2O3 in the PCM compared with PEG/SiO2. The hybrid PCM has excellent thermal stability and form-stable effects. Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.