Equipment Principle
The high-temperature vacuum magnetic field heating furnace system produced by our company consists of a heating furnace, heating furnace power supply, Labview control software (optional), electromagnet, high-precision bipolar constant current power supply, molecular pump set, and water cooling unit, forming a feedback-regulated heating system.
In this system, the mechanical pump (dry pump optional) in the molecular pump set first roughs the vacuum chamber (sample chamber). When the ultimate vacuum for starting the molecular pump is reached, the molecular pump is started for high-vacuum pumping to achieve the required vacuum level. By opening the software and inputting the desired magnetic field and temperature values, the temperature of the sample inside the equipment is automatically controlled and stabilized at a certain value through closed-loop feedback regulation. The software can complete the experiment according to the experimental conditions set by the user.
- Magnetic field control: Users can directly set the required magnetic field size through the software. The actual magnetic field value is read by a high-precision gaussmeter and fed back to the high-precision constant current power supply. After processing by the internal software of the power supply, the output current of the high-precision constant current power supply is directly controlled to achieve the desired magnetic field, which is displayed in real time on the software.
- Temperature control: By directly setting the required temperature value on the human-machine interface of the software, the computer software processes the command and sends it to the heating furnace temperature controller. The controller reads the actual temperature of the sample area through a temperature sensor (thermocouple) and adjusts the output current using its internal fuzzy control PID regulation to stabilize the temperature within a certain accuracy range, thus achieving the different temperatures required by the user.
- Vacuum environment: The vacuum environment is obtained through the molecular pump set, displayed and monitored by a high-vacuum full-range vacuum gauge, and the detection results are transmitted to the computer in real time.
- Annealing process: The sample is heated in a strong magnetic field (or non-magnetic) environment to a certain temperature (set by the user) and maintained at that temperature. Then a magnetic field is continuously applied (which can be changed at any time). After achieving the user's purpose, the magnetic field and heating environment are turned off, and the sample is cooled to room temperature.
System Block Diagram
