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Retention Behaviours Of Carbon In Sol-Gel Derived ZrO2 Studied By Fourier Transform Infrared Spectroscopy

Published online by Cambridge University Press:  21 February 2011

H.C. Zeng
H.C. Zeng*
Affiliation:
Department of Chemical Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 0511
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Abstract

The carbon retention patterns based on evolution of FT-IR spectra at different calcination temperatures for ZrO2 gels derived from Zr-n-propoxide-acetylacetone-water-isopropanol system are examined in detail. For most captured carbon species, carbon can be depleted at relatively low temperature of about 400°C. However, for lattice-included species, especially those incorporated into lattice during phase transition, a temperature around 900°C is needed to eliminate carbon in the gels. It is found that water treatment alone does not provide new routes for carbon retention in as-prepared ZrO2 gels. When gels are pre-treated with Ni2+ and water, new forms of carbon containing species can be observed. This is attributed to an inter-diffusion of Ni2+ and ZrO2 matrix and the catalytic effect of resultant solid solution NiO-ZrO2 on the retained carbon.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 715
Copyright
Copyright © Materials Research Society 1998

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References

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