The operation of the Czochralski furnace is fully automatic. The seed crystal is planted by electric motor. The speed and torque are balanced and the lifting speed is stable at 0.2mm/min. The unattended automatic control is used for equal diameter and detachment of crystals. Intelligent temperature control system, temperature control is stable at plus or minus 1 degree. The utility model belongs to a special equipment for producing various oxide intraocular lenses by direct pulling method. The characteristics of the furnace are as follows: the furnace body is a cylindrical vertical double-layer jacket structure with cooling water in the middle; the seed crystal rod is connected with the motor through flexible belt, reducer set; and the manual mechanism is connected with the ball screw through transmission rod, synchronous belt. The purpose of the utility model is to provide a crystal growth furnace, which aims to solve the problems existing in the past crystal growth furnace, such as inaccurate and convenient adjustment of the position of the seed crystal rod in the furnace, the operation of crystal converter motor at low speed, high current, complex furnace body processing and manufacturing, etc.
1. Providing R&D, technical support and industrialization services of crystal materials
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2. Provide research and development, technical support and industrialization of various crystal growth and high temperature heat treatment equipment (crystal growth furnace, vacuum furnace, atmosphere furnace, annealing furnace and experimental furnace, etc.).
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The crystal lifting furnace adopts advanced driving, transmission technology and matching devices to make the crystal rod run balanced and without crawling and vibration. At the same time, a high-precision programmable furnace temperature control device is used to realize automatic equal diameter and furnace temperature automatic control. It has a manual rapid lifting mechanism. It is an ideal equipment for 2-4 inch lithium niobate crystal growth and other oxide crystal growth below 1500 C.
Major technical data
Name, Unit, Indicator Number
Maximum furnace temperature 1700
Speed-up of seed rod: mm/h 0.6-8.5
Speed of seed rod RPM 0-100
Seed rod stroke mm 400
AC power supply V 220/380
Hot zone diameter mm 300
1. Electrical control part, control box is 19"- 3U standard control box.
Seed crystal transmission part, transmission system: lifting, rotating stepper motor and driver set. One control card. It has position limitation function.
Ball screw with pitch of 5 mm is used. Lifting stroke 480 mm
2. Water cooling system can add water circulation system to furnace shell according to customer's requirement, increase the cooling speed of whole furnace and ensure the surface of furnace shell.
The temperature is about 30 degrees, and the safety of operators is improved.
3. Insulation furnace body, the furnace uses imported alumina polycrystalline fiber material, long-term use will not crack and ensure the whole furnace.
Clean environment. It can withstand 2200 degrees high temperature.
4. Crystal furnace frame and lifting device: Crystal furnace itself is designed for 1.5-5.5 inch crystal growth. For crystal furnaces, the effective temperature of the furnace is reduced.
The diameter can reach 400 mm and the height 450 mm. It can work under low vacuum + gas protection or flow protection gas.