کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1792428 | 1023643 | 2011 | 4 صفحه PDF | دانلود رایگان |
Small ruby crystals were grown by the Czochralski technique in different atmospheres and their actual chromium content was analyzed by a wet chemical method. The chromium distribution coefficient k was found to be strongly dependent on oxygen partial pressure pO2pO2. It ranges from k=0.3 in a reducing atmosphere to k=1.2 in a slightly oxidizing atmosphere and to a good approximation k depends linearly on logpO2logpO2. The experimental data are discussed on the basis of thermodynamic equilibrium calculations.
► Melt growth of ruby single crystals.
► Chromium distribution coefficient depends nearly linearly on the logarithm of oxygen partial pressure during growth.
► Control of chromium valency.
► Option for homogeneous chromium distribution.
Journal: Journal of Crystal Growth - Volume 325, Issue 1, 15 June 2011, Pages 81–84