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Proceedings Paper

Effect of titanium doping on the rhombohedral twinning of sapphire
Author(s): Ender Savrun; Cetin Toy; William D. Scott; Daniel C. Harris
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Paper Abstract

Rhombohedral twinning is responsible for loss of c-axis compressive strength of sapphire at high temperatures. Loss of strength is shown to be due to cracking caused by intersecting twins. Single crystal sapphire was doped with both titanium and titanium ions in concentrations from 0.05 percent wt. to 0.25 percent wt. It is shown that both valence state and concentration of titanium are important is lowing down twin boundary movement and increasing the c-axis compressive strength of sapphire. Titanium doping did not cause any change in thermal conductivity and IR transmission of sapphire.

Paper Details

Date Published: 26 July 1999
PDF: 8 pages
Proc. SPIE 3705, Window and Dome Technologies and Materials VI, (26 July 1999); doi: 10.1117/12.354638
Show Author Affiliations
Ender Savrun, Sienna Technologies, Inc. (United States)
Cetin Toy, Sienna Technologies, Inc. (United States)
William D. Scott, Univ. of Washington (United States)
Daniel C. Harris, Naval Air Warfare Ctr. (United States)

Published in SPIE Proceedings Vol. 3705:
Window and Dome Technologies and Materials VI
Randal W. Tustison, Editor(s)

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