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Thermal diffusivity of zinc-aluminum layered double hydroxide using PVDF photoflash technique


Mat Yunus, Wan Mahmood and Ghaziean, Maryam Ranjbar and Hussein, Mohd Zobir and Lim, Mei Yee (2010) Thermal diffusivity of zinc-aluminum layered double hydroxide using PVDF photoflash technique. Journal of Materials Science and Engineering, 4 (3). pp. 7-10. ISSN 1934-8959; ESSN: 1934-8967


Thermal diffusivity of zinc-aluminum layered double hydroxides synthesized at different molar ratios of Zn to Al, at pH 7 and 8 were measured using polyvinlidene diflouride (PVDF) photoflash technique. The samples were prepared using Zn(NO3)2 and Al(NO3)2 solutions by dropwise addition of NaOH solution with vigorous stirring under nitrogen atmosphere. The different ratios of Zn to Al were obtained by changing the molar ratio of Zn(NO3)2 to Al(NO3)2 solutions. The slurry formed was kept at 70 ˚C in an oil bath shaker for 18 h and then filtered, washed and dried in an oven for another 48 h at 70 ˚C. A simple photoflash and PVDF transducer were used as light source and thermal wave detector, respectively. All the measurements of thermal diffusivity of Zn-Al layered double hydroxide were carried out at room temperature. For Zn/Al > 3, the thermal diffusivity of all series of sample prepared at pH = 7 and 8 increase with the increasing of Zn composition. Thermal diffusivity values of zinc-aluminum layered doubled hydroxide synthesized at pH 8 are higher than the values obtained for samples prepared at pH = 7 except for Zn/Al higher than 5.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Publisher: David Publishing
Keywords: Thermal diffusivity; Zn-Al ratio; LDH; Photoflash; Polyvinlidene diflouride (PVDF)
Depositing User: Nabilah Mustapa
Date Deposited: 18 Feb 2016 02:14
Last Modified: 08 Apr 2016 09:37
URI: http://psasir.upm.edu.my/id/eprint/17393
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