Details
| Original language | English |
|---|---|
| Pages (from-to) | 1616-1618 |
| Number of pages | 3 |
| Journal | Journal of the American Ceramic Society |
| Volume | 85 |
| Issue number | 6 |
| Publication status | Published - 20 Dec 2004 |
Abstract
A plane-parallel, polished, 0.9 mm thick, single-crystal (001) plate of 2:1 mullite was treated for 6 h at 1600°C in an Ar/H2O (90/10) gas mixture at 100 kPa. Optical microscopy studies and infrared (IR) reflection spectroscopy studies of the lattice vibrations yielded no evidence for change with respect to the untreated reference crystal. However, IR absorption spectroscopy showed that structurally bound OH groups were formed by the heat treatment in the Ar/H2O gas mixture. IR absorption depth profile analysis showed a rather homogeneous OH distribution through the crystal. Five different hydroxyl groups were separated according to dipole orientations and peak positions: E∥a, ωa1 = 3447 cm-1, ωa2 = 3579 cm-1; E∥b, ωb1 = 3456 cm-1, ωb2 = 3544 cm-1; and E∥c, ωc1 = 3498 cm-1. All IR peaks were strongly broadened (between 90 and 150 cm-1) because of a distribution in O-H binding distances caused by the real structure of mullite.
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Materials Science(all)
- Materials Chemistry
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In: Journal of the American Ceramic Society, Vol. 85, No. 6, 20.12.2004, p. 1616-1618.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High-temperature hydroxylation of mullite
AU - Rüscher, Claus H.
AU - Shimada, Shiro
AU - Schneider, Hartmut
PY - 2004/12/20
Y1 - 2004/12/20
N2 - A plane-parallel, polished, 0.9 mm thick, single-crystal (001) plate of 2:1 mullite was treated for 6 h at 1600°C in an Ar/H2O (90/10) gas mixture at 100 kPa. Optical microscopy studies and infrared (IR) reflection spectroscopy studies of the lattice vibrations yielded no evidence for change with respect to the untreated reference crystal. However, IR absorption spectroscopy showed that structurally bound OH groups were formed by the heat treatment in the Ar/H2O gas mixture. IR absorption depth profile analysis showed a rather homogeneous OH distribution through the crystal. Five different hydroxyl groups were separated according to dipole orientations and peak positions: E∥a, ωa1 = 3447 cm-1, ωa2 = 3579 cm-1; E∥b, ωb1 = 3456 cm-1, ωb2 = 3544 cm-1; and E∥c, ωc1 = 3498 cm-1. All IR peaks were strongly broadened (between 90 and 150 cm-1) because of a distribution in O-H binding distances caused by the real structure of mullite.
AB - A plane-parallel, polished, 0.9 mm thick, single-crystal (001) plate of 2:1 mullite was treated for 6 h at 1600°C in an Ar/H2O (90/10) gas mixture at 100 kPa. Optical microscopy studies and infrared (IR) reflection spectroscopy studies of the lattice vibrations yielded no evidence for change with respect to the untreated reference crystal. However, IR absorption spectroscopy showed that structurally bound OH groups were formed by the heat treatment in the Ar/H2O gas mixture. IR absorption depth profile analysis showed a rather homogeneous OH distribution through the crystal. Five different hydroxyl groups were separated according to dipole orientations and peak positions: E∥a, ωa1 = 3447 cm-1, ωa2 = 3579 cm-1; E∥b, ωb1 = 3456 cm-1, ωb2 = 3544 cm-1; and E∥c, ωc1 = 3498 cm-1. All IR peaks were strongly broadened (between 90 and 150 cm-1) because of a distribution in O-H binding distances caused by the real structure of mullite.
UR - http://www.scopus.com/inward/record.url?scp=0036607683&partnerID=8YFLogxK
U2 - 10.1111/j.1151-2916.2002.tb00322.x
DO - 10.1111/j.1151-2916.2002.tb00322.x
M3 - Article
AN - SCOPUS:0036607683
VL - 85
SP - 1616
EP - 1618
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 6
ER -