INSTALLATION FOR GROWING MONOCRYSTALS, FOR EXAMPLE SAPPHIRE Russian patent published in 2010 - IPC C30B15/00 C30B15/26 C30B17/00 C30B29/20 

FIELD: chemistry.

SUBSTANCE: installation has a cylindrical chamber 1 with a cover 2 and a tray 3, a block of heat shields fitted in the chamber, a melting crucible with a seed holder on top, which is joined to a rod 9, a bearing swivel arm 11, a column 10 with rotary and displacement actuators 12 and 13 for the rod 9, a vacuum system 14, a feed system with a control cabinet 15 and a cooling system 16. The block of heat shields comprises upper and lower shields. The installation is fitted with a mechanism for raising the cover in form of an actuator 23 mounted on the swivel arm 11 and connected to the cover 2 of the chamber 1 by a flexible element 24 which is made in form of a chain, wherein the actuator 23 of the mechanism for raising the cover has a controlled torque-limiting clutch adjusted to a force which is sufficient for raising the cover 2, but slides when raising the rod 9 and the fixed cover. The installation is also fitted with a hoisting device 26 for raising the crucible and lower heat shields which is mounted on the column with possibility of turning about the axis of the column, wherein the hoisting device 26 is fitted with a withdrawing device for fitting and withdrawing the crucible. The upper heat shields are attached on the inner side of the cover 2 of the chamber 1, on the outside of which there are three inspection windows 21, 22, and the tray 3 of the chamber 1 has a water-cooled plug with a channel for feeding inert gas, and the control cabinet is fitted with a remote console 30 in form of an electronic knob mounted on the lateral surface of the cabinet.

EFFECT: high efficiency, possibility of growing bulk monocrystals with a cylindrical shape in automatic mode, perfection of the structure of monocrystals and uniformity of their size on the entire length owing to use of high-precision control mechanisms based on an industrial computer.

6 dwg