TY - JOUR
T1 - Study of thermally treated dickite by infrared and micro-Raman spectroscopy using curve-fitting technique
AU - Shoval, S.
AU - Michaelian, K. H.
AU - Boudeulle, M.
AU - Panczer, G.
AU - Lapides, I.
AU - Yariv, S.
PY - 2002
Y1 - 2002
N2 - The products of dickite heated in air at 1000 to 1300°C were studied using curve-fitting of transmission and photoacoustic infrared and micro-Raman spectra. The spectra were compared with those of mullite, Al-spinel, corundum, cristobalite, amorphous silica and meta-dickite. Bands that characterize crystalline phases appeared at 1100°C and became stronger with increasing temperature. Mullite, Al-spinel, corundum and amorphous silica were identified by their characteristic bands. The characteristic IR bands of cristobalite overlap those of mullite and amorphous silica, and its presence was therefore established from intensity ratios of the appropriate bands. The research clearly demonstrated the advantage of using curve-fitting for the identification of high temperature phases in the study of the thermal treatment of kaolin-like minerals by infrared and Raman spectroscopy. This technique seems to be a useful method for materials analysis in the ceramic industry.
AB - The products of dickite heated in air at 1000 to 1300°C were studied using curve-fitting of transmission and photoacoustic infrared and micro-Raman spectra. The spectra were compared with those of mullite, Al-spinel, corundum, cristobalite, amorphous silica and meta-dickite. Bands that characterize crystalline phases appeared at 1100°C and became stronger with increasing temperature. Mullite, Al-spinel, corundum and amorphous silica were identified by their characteristic bands. The characteristic IR bands of cristobalite overlap those of mullite and amorphous silica, and its presence was therefore established from intensity ratios of the appropriate bands. The research clearly demonstrated the advantage of using curve-fitting for the identification of high temperature phases in the study of the thermal treatment of kaolin-like minerals by infrared and Raman spectroscopy. This technique seems to be a useful method for materials analysis in the ceramic industry.
KW - Dickite
KW - Mullite
KW - Spinel
KW - Thermal analysis
KW - Vibrational spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=0036345299&partnerID=8YFLogxK
U2 - 10.1023/A:1019954227093
DO - 10.1023/A:1019954227093
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AN - SCOPUS:0036345299
SN - 1418-2874
VL - 69
SP - 205
EP - 225
JO - Journal of Thermal Analysis and Calorimetry
JF - Journal of Thermal Analysis and Calorimetry
IS - 1
ER -