DEVICE FOR GROWING MONOCRYSTALS OF COMPOSITE OXIDES Russian patent published in 2005 - IPC

FIELD: chemical industry; methods of growing of volumetric monocrystals.

SUBSTANCE: the invention is dealt with methods of production of volumetric monocrystals and may be used at controlled solution-melt growing of crystals of substances, for example of composite oxides. The device contains a compound cylindrical king-pot system made out of a ceramic material and consisting of the crystallization and auxiliary king-pots linked through a funnel, internal surfaces of which are made with a platinum cover. The crystallization king-pot on its external surface has two ring-type coaxial ledges, the first of which is located on the lower end of its lateral surface, and the second ledge - on the outer diameter of the bottom part of the crystallization king-pot as its extension. The central part of the bottom of the crystallization king-pot is made in the form of the hollow pyramid with the internal surface representing a cone and with its external surface representing a hexahedral pyramid. The furnace system of the king-pot heating is made in the form of three mechanically separated tubular furnace(modules of a planar structure mounted spatially coaxial - sequentially one after another. Autonomous heating elements of tubular furnace modules planar structure are electrically connected each with its power unit and each is supplied with the working temperature sensor and the thermostat. Outputs of the thermostats are connected to the inputs of the unit of the temperature controllers, and outputs of the unit of the temperature controllers are connected to the control inputs of the corresponding power units. Each working temperature sensor is connected to its own thermostat. The unit of temperature controls consists of the similar controllers, the number of which corresponds to the number of the self-contained heaters of the furnace modules. The temperature sensors for control over the temperature of bottoms of the auxiliary and crystallization king-pots are connected to their own thermostats and meters of temperature, and outputs of the temperature controllers and meters of temperature are connected to the computer. The device allows to increase chemical and configuration homogeneity of grown monocrystals at simultaneous decrease of costs of realization of the production processes.

EFFECT: the invention ensures increased chemical and configurational homogeneity of the grown monocrystals at simultaneous decrease of costs of realization of the production processes.

3 cl, 6 dwg