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Original Articles

Thermal characterisation of dye-intercalated K-10 montmorillonite ceramics using photoacoustic technique

, , , , &
Pages 895-905 | Received 21 Jul 2008, Accepted 09 Feb 2009, Published online: 11 Oct 2010
 

Abstract

Thermal diffusivity (TD) measurements were performed on some industrially important dyes – auramine O (AO), malachite green and methylene blue (MB) – adsorbed K-10 montmorillonites using photoacoustic method. The TD value for the dye-adsorbed clay mineral was observed to change with a variation in dye concentration. The contribution of the dye towards TD was also determined. The repeatedly adsorbed samples with MB and AO exhibited a lower TD than the single-adsorbed samples. TD values of sintered MB samples were also obtained experimentally. These sintered samples exhibit a higher TD, although they show a trend similar to that of non-sintered pellets. A variation in dye concentration and sintering temperature can be used for tuning the TD value of the clay mineral to the desired level.

Acknowledgement

LKJ is thankful to University Grants Commission (UGC, Govt. of India) for financial assistance.

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