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Publication of UA69602C2publicationCriticalpatent/UA69602C2/en
A method for preparing sapphire windows involves serial annealing in saturated vapors of aluminium oxide, and thereafter in carbon gaseous medium. Annealed are in saturated vapors of aluminium oxide samples of thickness of L = 1.67.l+- 1 at the temperature of 1800 - 2030 DEGREE C during the period of time of: and thereafter in carbon gaseous medium at the temperature of 1880 - 1930 DEGREE C during the period of time of: and thereafter annealed samples are mechanically treated removing uniformly from all the parts the layer to a necessary thickness of the finished article.
UA2003098763A2003-09-262003-09-26A method for preparing sapphire windows
UA69602C2
(en)