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Hollow Borosilicate Microspheres from Aqueous Solution

Published online by Cambridge University Press:  15 February 2011

James A. Hagarman
James A. Hagarman*
Affiliation:
PQ Corporation, P. O. Box 840, Valley Forge, PA 1948
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Abstract

Metastable aqueous borosilicate solutions may be processed to hollow microspheres by a combination of liquid feed atomization and thermal exposure. Techniques for feed preparation and the relationships between feed composition, stability and processibility are discussed. Optimization of feed atomization, hollow sphere formation and finishing operations are discussed relative to density, size, strength, and chemical durability properties of finished products. The connection between finished properties and product utility is presented for several applications including lightweight fillers for thermoset resins and vinyl plastisols, and physical sensitizers for emulsion explosives.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 372: Symposium W1 – Hollow and Solid Spheres and Microspheres--Science and Technology , 1994 , 33
Copyright
Copyright © Materials Research Society 1995

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References

1. Bratt, P. W., Cunnion, J. P., and Spivack, B. D., Mechanical Testing of Glass Hollow Microspheres, Advances in Materials Characterization, edited by Rossington, David R., Condrate, Robert A., and Snyder, Robert L., pp 441–447 (1983)Google Scholar
2. Weinstein, B. W., White Light Interferometric Measurement of the Wall Thickness of Hollow Glass Microspheres, Journal of Applied Physics, 46:5305 (1975)Google Scholar