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Preparation and properties of uniform coated colloidal particles. VIII. Titanium nitride on silica

Published online by Cambridge University Press:  31 January 2011

Richard E. Partch ,
Yuming Xie ,
S.T. Oyama  and
Egon Matijević
Richard E. Partch
Affiliation:
Center for Advanced Materials Processing, Clarkson University, Potsdam, New York 13699-5814
Yuming Xie
Affiliation:
Center for Advanced Materials Processing, Clarkson University, Potsdam, New York 13699-5814
S.T. Oyama
Affiliation:
Center for Advanced Materials Processing, Clarkson University, Potsdam, New York 13699-5814
Egon Matijević
Affiliation:
Center for Advanced Materials Processing, Clarkson University, Potsdam, New York 13699-5814
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Abstract

Spherical silica particles, dispersed in ethanol/water solutions, were first coated with titania by hydrolysis of added titanium isopropoxide. The coating thickness could be readily adjusted by the ratio of titanium alkoxide concentration to the amount of silica. The coated cores prepared as above were then treated with ammonia in a temperature-programmed reaction to produce a shell of titanium nitride. After nitridation, the powders of the high specific surface area showed electrical conductivity, which depended on the thickness of the coatings.

Type
Articles
Information
Journal of Materials Research , Volume 8 , Issue 8 , August 1993 , pp. 2014 - 2018
Copyright
Copyright © Materials Research Society 1993

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References

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