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Low temperature stabilization of zirconia by Mn through Co-precipitated hydroxide gel route

Published online by Cambridge University Press:  03 March 2011

A. Keshavaraja  and
A. V. Ramaswamy
A. Keshavaraja
Affiliation:
National Chemical Laboratory, Pune 411 008, India
A. V. Ramaswamy
Affiliation:
National Chemical Laboratory, Pune 411 008, India
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Extract

Stabilization of zirconia into cubic phase is achieved by partly substituting Zr4+ with Mn4+ ions (5–30 mole %) via hydroxide gel formation and subsequent calcination at 773 K and is supported by XRD and IR data. A linear correlation between the lattice parameter and the Mn content confirms the incorporation of Mn into ZrO2. The XPS and TPR results provide some evidence for the presence of Mn4+ ions in these samples which have a surface area of about 100 m2 g-1 and are stable in the cubic phase up to 973 K. On reduction above 973 K, the cubic phase is stabilized probably by Mn2+ ions.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 4 , April 1994 , pp. 837 - 840
Copyright
Copyright © Materials Research Society 1994

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References

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