国外蓝宝石晶体生长炉介绍.docVIP

“OMEGA” GROWER Catalog General view of assembled grower “Omega”. 2. Technical purpose of the grower “Omega”. The grower is intended for growing sapphire single crystals with diameter up to 200 mm and length up to 200 mm and weight up to 20 kg by the Kyropoulos method. The method consists in heating the initial raw material (aluminum oxide) in a tungsten crucible up to its melting point 2050 oC or above and gradual decreasing the melt temperature to crystallize it on a special seed. The growth is conducted in an air-locked crystallizer having special thermoisolating shields, covers and heater with charged crucible inside. 3. Technical specifications of the grower “Omega”. Parameter Value Mode of operation continuous for 200 hours Melt temperature, oC 2050 Heater power, kW 80 Current a.c. 3-phase with zero wire, 380 V, 50 Hz Medium of operation vacuum up to 8x10-4 Pa, after growth - argon Method of heating resistive Duration of a cycle, hrs 200 Cooling water temperature, oC flowrate 28 ± 5 3 m3 x hr The load distribution between the phases is to be as follows : Phase A – 250 A, phase B – 250 A, phase C – 20 A. To start the operation it is necessary to supply the grower with: recirculated water of I category under the pressure of 0,4 ( 0,05 MPa. pure gaseous argon under the pressure of 0,06 MPa (0,6 kgf/cm2). For arrangement of the grower at the plant the following is required: minimal working area (room) - 8 m2; self-flowing water disposal system located on the floor level; ground mat. 4. Basic elements and component parts of the grower and their brief technical description. The grower “Omega” consists of the components listed in the table below: Name of part Quantity, pcs. Overall dimensions, mm L:W:H Weight, kg Crystallizer (with vacuum system and control block) 1 2000x1000x2400 1010 Power cabinet (transformer) 1 1200x1000x1800 810 Mechanical vacuum pump 1 27 Mounting kit 1 60 Consumable material