Author： Churbanov M.F. Shaposhnikov R.M. Skripachev I.V. Snopatin G.E.
Publisher： MAIK Nauka/Interperiodica
ISSN： 0020-1685
Source： Inorganic Materials, Vol.39, Iss.1, 2003-01, pp. : 77-81
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Abstract
The flow rate of molten arsenic selenide in cylindrical channels is measured at channel diameters of 3.0 to 5.5 mm, channel lengths of 40 to 120 mm, temperatures of 285–320 and 375–470°C, and inert gas gage pressures of up to 1.5 × 105 Pa. It is found that there is a motionless melt layer on the inner surface of the channel. For a channel 4.6 mm in diameter, its thickness is 0.7 mm at 290°C and 0.1 mm at 420°C. In the temperature range 280–315°C, there is a threshold gas pressure below which the melt does not flow. Partial crystallization may occur in the flowing melt. Its effect on the melt flow rate grows as the holding time at 270–320°C increases. The data obtained can be used to choose conditions for producing As2Se3 optical fibers by the crucible method.
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