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Design Guidelines and Water Extraction Synthesis Capabilities for Hollow Ceramic Microspheres for Low Dielectric Constant Inorganic Substrates

Published online by Cambridge University Press:  15 February 2011

Jay G. Liu  and
David L. Wilcox SR.
Jay G. Liu
Affiliation:
Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801
David L. Wilcox SR.
Affiliation:
Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801
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Abstract

This paper reports the use of hollow ceramic microspheres for a controlled porosity composite application and an emulsion/extraction method to make them. Design guidelines for this application are presented in which the physical properties and geometry of the microspheres are correlated to both dielectric constant and mechanical strength of the composites. The analytical modeling indicates that small size, thin walled ceramic microspheres with thermal expansion coefficients greater than that of common ceramic substrate matrices are needed to lower the dielectric constant significantly while retaining good mechanical strength. An emulsion/water extraction method was developed to prepare such hollow ceramic microspheres. This method shows promise for making very small (< 10 μm) hollow microspheres of various ceramic compositions. The capability and limitation of this synthesis route are shown.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 372: Symposium W1 – Hollow and Solid Spheres and Microspheres--Science and Technology , 1994 , 231
Copyright
Copyright © Materials Research Society 1995

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