Growth of near-net-shaped sapphire domes using the heat exchanger method

Crack-free near-net-shaped [0001] orientation sapphire blanks of nearly hemispherical shape and 8 cm diameter have been produced directly from the melt by the heat exchanger method. Molybdenum preforms placed in the crucible did not perturb the solid-liquid interface during growth. The inside and ou...

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Veröffentlicht in:	Materials letters 1989, Vol.7 (9), p.318-321
Hauptverfasser:	Khattak, Chandra P., Schmid, Frederick
Format:	Artikel
Sprache:	eng
Schlagworte:	Cross-disciplinary physics: materials science rheology Exact sciences and technology Growth from melts zone melting and refining Materials science Methods of crystal growth physics of crystal growth Physics
Online-Zugang:	Volltext
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Zusammenfassung:	Crack-free near-net-shaped [0001] orientation sapphire blanks of nearly hemispherical shape and 8 cm diameter have been produced directly from the melt by the heat exchanger method. Molybdenum preforms placed in the crucible did not perturb the solid-liquid interface during growth. The inside and outside curvature of these blanks can be accurately controlled.
ISSN:	0167-577X 1873-4979
DOI:	10.1016/0167-577X(89)90016-5