Method of growing monocrystals of corundum from a melt

Abstract

A method for growing corundum monocrystals from a melt, and a heater in a device for carrying said method into effect. According to the method the growth process of corundum monocrystals uses alumina placed in a container which is made of a group VI metal of the periodic table, and having a melting point above 2300.degree. C. The growth process occurs in a shielding atmosphere with the use of Joule heating by passing the container with the melt through a temperature gradient effective across the crystallization zone. The resistive heater used in the device is made as a bifilar coil of a solid tungsten bar.

Dependencies are inferred from the claim text.