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Near-Net-Shape Forming of Celsian Ceramics from Ion-Exchanged Zeolite Precursors

Published online by Cambridge University Press:  21 February 2011

Bahar Hoghooghi ,
Joanna Mckittrick ,
Chad Butler ,
Eugene Helsel  and
Olivia Lopez
Bahar Hoghooghi
Affiliation:
Department of Applied Mechanics and Engineering Sciences, University of California, San Diego, La Jolla,CA 92093-0411
Joanna Mckittrick
Affiliation:
Department of Applied Mechanics and Engineering Sciences, University of California, San Diego, La Jolla,CA 92093-0411
Chad Butler
Affiliation:
Department of Applied Mechanics and Engineering Sciences, University of California, San Diego, La Jolla,CA 92093-0411
Eugene Helsel
Affiliation:
Department of Applied Mechanics and Engineering Sciences, University of California, San Diego, La Jolla,CA 92093-0411
Olivia Lopez
Affiliation:
Department of Applied Mechanics and Engineering Sciences, University of California, San Diego, La Jolla,CA 92093-0411
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Abstract

A technique has been developed for the synthesis and near-net-shape forming of celsian glass-ceramics. This technique involves ion exchange of zeolite precursor powders, heat treatment of the powders to temperatures between 800–90°C to form a glassy phase during which the samples are formed under low stresses (<20 MPa). Upon further heat treatment to about 1000°C, crystallization occurs and the amorphous formed body is transformed to the celsian ceramic phase. Using this technique, and through the addition of monoclinic seed particles as well as a mineralizer, monoclinic celsian was produced at temperatures as low as 1000°C at heat treatment times of less than one hour. This forming technique also resulted in a significant reduction in the porosity of the ceramic bodies compared to free-sintered samples.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 493
Copyright
Copyright © Materials Research Society 1998

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References

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