Share Email Print
cover

Proceedings Paper

Correlation of strength and processing variables for optical-quality spinel
Author(s): Donald W. Roy; Stanley H. Evans
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Demands for both superior optical quality and maximum strength in Spinel (MgAl2O4) are becoming so stringent that a study has been undertaken to see if varying the processing sequence for Spinel will yield an improvement in its strength without degrading the optical quality. Current ceramic processing includes a hot press cycle followed by hot isostatic pressing to improve optical clarity. Optical fabrication follows, consisting of generation (milling), grinding and polishing. A test matrix, executed utilizing biaxial strength measurements coupled with grain size analysis, has demonstrated that if hot isostatic pressing is delayed until after generation and grinding of the substrate, a substantial increase in strength can be achieved. Knowledge gained in this experiment allows transmission and strength to be optimized to arrive at the best product for a given application.

Paper Details

Date Published: 6 December 1993
PDF: 9 pages
Proc. SPIE 2018, Passive Materials for Optical Elements II, (6 December 1993); doi: 10.1117/12.165221
Show Author Affiliations
Donald W. Roy, Alpha Optical Systems, Inc. (United States)
Stanley H. Evans, Alpha Optical Systems, Inc. (United States)


Published in SPIE Proceedings Vol. 2018:
Passive Materials for Optical Elements II
Gary W. Wilkerson, Editor(s)

© SPIE. Terms of Use
Back to Top