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Applications of FTIR and ^{57}Fe Mössbauer Techniques in Studies of Recently Excavated Indian Archaeological Pottery

100%

Dhanapandian S., Manoharan C., Sutharsan P.

Acta Physica Polonica A

2012

vol. 121

issue 3

592-598

The Fourier transform infrared absorption spectra and ^{57}Fe Mössbauer spectra have been recorded at room temperature for the recently excavated archaeological pottery sherds. FTIR spectroscopy is used to estimate the lower limit of firing temperature and firing nature of the pottery sherds, and it is confirmed by the results of the Mössbauer technique results. The results show that the ^{57}Fe Mössbauer and FTIR spectra of few pottery sherds of Perumalpattu and Theriruveli are nearly identical, indicating that they may belong to the same origin. ^{57}Fe Mössbauer spectra of black coloured sherds show the presence of Fe^{2+} ions which confirm the relation between the black colour in pottery and the existence of non-magnetic FeO compound, resulting from the reducing atmospheric condition during firing. FTIR results of reddish pot sherds show the presence of significant amount of Fe_2O_3/α-Fe_2O_3, which confirms again the relationship between the state and form of iron present in the pottery and its colour.

Effect of Incorporation of Granite and Marble Rejects in Clay Brick Products: Physico-Mechanical Analysis

76%

Dhanapandian S., Manoharan C., Ramkumar T., Gnanavel B., Sutharsan P., Shanthi M.

issue 4

688-695

The objective of this work is to characterize and evaluate the effect of incorporation of granite and marble rejects on the properties and microstructure development of three different clay materials used to fabricate brick materials in the brick industry. The raw materials are characterized with respect to their chemical composition by X-ray fluorescence, particle size distribution and mineralogical composition by X-ray diffraction and plasticity. Compositions have been prepared with additions of 0, 10, 20, 30, 40 and 50 wt% reject in three different clay material from Tamilnadu State, India, and fired at temperatures from 500 to 900°C in laboratory furnace. The behaviour of mixtures containing 80 wt% clay material + 20 wt% reject is discussed in detail. The technological properties of briquette specimens such as flexural rupture strength, water absorption, porosity and bulk density were determined. The microstructure of the fired briquette specimens were observed by scanning electron microscopy with energy dispersive X-ray spectrometry, Mössbauer spectroscopy. The results of the above studies show that incorporations of granite and marble rejects up to 50 wt% is potential to the industrial clay brick products, with no major sacrifice on the properties of the final product, anticipating no costly modifications in the industrial production line.

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2 Acta Physica Polonica A

1 2012

1 2010

2 Dhanapandian S.

2 Manoharan C.

2 Sutharsan P.

1 Gnanavel B.

1 Ramkumar T.

1 Shanthi M.

Search results

Applications of FTIR and ^{57}Fe Mössbauer Techniques in Studies of Recently Excavated Indian Archaeological Pottery

Effect of Incorporation of Granite and Marble Rejects in Clay Brick Products: Physico-Mechanical Analysis