Growth of Sapphire Single Crystals Transparent Armor by a Modified Verneuil Technique.
Abstract
The objective of the process development program was to determine whether it was feasible to produce slab shaped sapphire single crystals by a modified Verneuil technique for transparent armor applications. Seeded single crystals of sapphire were grown with widths in excess of 2 1/2 inches, lengths in excess of 2 1/2 inches and thicknesses of 3/8 inch (program goals). It was clearly demonstrated that controlled growth of high-aspect-ratio oxide single crystals by the 'strip' Verneuil technique is feasible. An engineering cost analysis indicated that 8 inch by 1/4 inch sapphire windows could be produced at an approximate cost of $60 per pound provided reasonable yields of crack-free single crystals could be achieved. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1970
- Accession Number
- AD0715941
Entities
People
- John S. Haggerty
- Michael Rossetti
Organizations
- Arthur D. Little