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Clean-Room and Co2-Laser Processing of Ultra High-Purity Al2O3

Published online by Cambridge University Press:  28 February 2011

P.A. Morris ,
R.H. French ,
R.L. Coble ,
F.N. Tebbe  and
U. Chowdhry
P.A. Morris
Affiliation:
Dept. of Materials Science, Massachusetts Institute of Technology, Cambridge, MA 02139
R.H. French
Affiliation:
Dept. of Materials Science, Massachusetts Institute of Technology, Cambridge, MA 02139 Presently at E. I. du Pont de Nemours and Co., Wilmington DE
R.L. Coble
Affiliation:
Dept. of Materials Science, Massachusetts Institute of Technology, Cambridge, MA 02139
F.N. Tebbe
Affiliation:
Central Research and Development Department, E.I. du Pont de Nemours and Co., Wilmington, DE 19898
U. Chowdhry
Affiliation:
Central Research and Development Department, E.I. du Pont de Nemours and Co., Wilmington, DE 19898
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Abstract

Clean-room powder processing, furnace firing, and CO2-laser heating techniques to produce high-purity Al2O3 ceramics were applied to a new source of high-purity Al2O3 ( 〉13 ppm total and 〉8 ppm cation detected impurities). The chemical analyses of the material after each stage of processing and firing indicate that the procedures used in this work give no detectable contamination of the material. The microstructure of a CO2-laser ultra high-purity Al2O3 is illustrated. Densification is incomplete for this material. Calcination and deagglomeration were not optimized. Procedures, such as these are required to control the trace impurity contents in a fired ceramic material

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 60: Symposium L – Defect Properties and Processing of High-Technology Nonmetallic Materials , 1985 , 79
Copyright
Copyright © Materials Research Society 1986

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References

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