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Coating of Silicon Nitride with Sintering Aid

Published online by Cambridge University Press:  25 February 2011

P. N. Joshi  and
R. A. Mccauley
P. N. Joshi
Affiliation:
Rutgers University, Dept. of Ceramic Science and Engineering, Piscataway, NJ 08855-0909
R. A. Mccauley
Affiliation:
Rutgers University, Dept. of Ceramic Science and Engineering, Piscataway, NJ 08855-0909
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Abstract

Commercially available silicon nitride powders were coated with various metal oxides with the help of metal-organic surfactants in an aqueous medium. A surfactants could also act as a dispersant. The coatings were studied by XPS, TEM and accoustophoresis and the mechanism for formation of these coatings is proposed. The amount of sintering aid incorporated was determined by the surface area and surface chemistry of the nitride powder, the pH of the solution, the structure of the surfactant and the surface charge behavior of the powder and the coating. Multicomponent coatings were also possible by precise control of these parameters. The sintering behavior of the coated powders and the properties of the sintered material were promising.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 249: Symposium Q – Synthesis and Processing of Ceramics: Scientific Issues , 1991 , 443
Copyright
Copyright © Materials Research Society 1992

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References

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