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Thermal diffusivity of kaolinite–mullite ceramic matrix composite with silicon nitride nanoparticle filler


Citation

See, Alex and Hassan, Jumiah and Hashim, Mansor and Abdul Wahab, Zaidan (2014) Thermal diffusivity of kaolinite–mullite ceramic matrix composite with silicon nitride nanoparticle filler. Thermochimica Acta, 593. pp. 76-81. ISSN 0040-6031; ESSN: 1872-762X

Abstract

Thermal diffusivity of mullite fused ceramics was determined from room temperature up to 500 °C at intervals of 100 °C. The ceramic material was formed by combining kaolinite as the matrix and silicon nitride as the filler powder. The ceramics were sintered at 1000 °C, 1100 °C, and 1200 °C to study the structural differences. Thermal diffusivity data showed that the addition of silicon nitride affects the composites heat flow and this behavior is noticeable at 1100 °C and 1200 °C samples. The thermal diffusivity data was plotted on 1000/T graph to demonstrate a linear relation for filler effects of silicon nitride on the mullite matrix. Additions of 25% and 30% silicon nitride sintered at 1200 °C exhibited thermal diffusivity values lower than pure mullite crystal at 0.55–0.45 mm2/s. These values suggest that heat conduction across the system was interrupted by silicon nitride nanoparticle additions via micropore formations. These samples have potential applications for high temperature thermal insulation.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
DOI Number: https://doi.org/10.1016/j.tca.2014.08.022
Publisher: Elsevier
Keywords: Nanocomposites; Si3N4; Aluminosilicates; Thermal properties
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 10 Feb 2016 08:35
Last Modified: 10 Feb 2016 08:35
Altmetrics: http://ac.els-cdn.com/S0040603114003864/1-s2.0-S0040603114003864-main.pdf?_tid=aa80c156-b511-11e5-9726-00000aab0f27&acdnat=1452152498_166fc504dddfbcfc39cd9ef49768484c10.1016/j.tca.2014.08.022
URI: http://psasir.upm.edu.my/id/eprint/35838
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