Device and method for detecting curie temperature of permanent magnet material

1 . A device for detecting Curie temperature of a permanent magnet material, comprising:

a detection coil, wherein two ends of the detection coil are respectively fixed by a sample fixing tube;

a temperature test box arranged inside the detection coil, wherein the temperature test box is provided with a piercing hole for a permanent magnet material sample to be tested to pass in and out, and the temperature test box is in communication with a temperature control device;

a temperature sensor arranged in the temperature test box; and

a magnetic flux integrator connected to the detection coil.

2 . The device for detecting Curie temperature of the permanent magnet material according to claim 1 , wherein the piercing hole is arranged at a center of a top of the temperature test box, and the temperature test box is coaxially arranged with the detection coil.

3 . The device for detecting Curie temperature of the permanent magnet material according to claim 1 , wherein the sample fixing tube has an integral structure, the detection coil is sleeved on the sample fixing tube, the temperature test box is arranged inside the sample fixing tube, and a position of the temperature test box corresponds to a position of the detection coil.

4 . A method for detecting Curie temperature of a permanent magnet material, the method being carried out by the device according to claim 1 , wherein the method comprises:

preheating the magnetic flux integrator;

setting the magnetic flux integrator to zero before placing the permanent magnet material sample to be tested in the temperature test box;

saturating and magnetizing the permanent magnet material sample to be tested and then connecting the permanent magnet material sample to be tested to a connecting rod, extending the permanent magnet material sample to be tested into the temperature test box through a piercing hole via the connecting rod, and locating the permanent magnet material sample to be tested at a center of the temperature test box;

setting a plurality of temperature collection points between a room temperature and a highest measured temperature, controlling a temperature in the temperature test box by the temperature control device to rise from the room temperature to each of the temperature collection points sequentially, drawing the detection coil or the permanent magnet material sample to be tested or rotating the permanent magnet material sample to be tested to generate an electrical signal after a temperature of the permanent magnet material sample to be tested and a temperature in the temperature test box reach thermal balance at each of the temperature collection points, and recording a current temperature in the temperature test box and a corresponding magnetic moment data.

5 . A method for detecting Curie temperature of a permanent magnet material, the method being carried out by the device according to claim 2 , wherein the method comprises:

preheating the magnetic flux integrator;

setting the magnetic flux integrator to zero before placing the permanent magnet material sample to be tested in the temperature test box;

saturating and magnetizing the permanent magnet material sample to be tested and then connecting the permanent magnet material sample to be tested to a connecting rod, extending the permanent magnet material sample to be tested into the temperature test box through a piercing hole via the connecting rod, and locating the permanent magnet material sample to be tested at a center of the temperature test box;

setting a plurality of temperature collection points between a room temperature and a highest measured temperature, controlling a temperature in the temperature test box by the temperature control device to rise from the room temperature to each of the temperature collection points sequentially, drawing the detection coil or the permanent magnet material sample to be tested or rotating the permanent magnet material sample to be tested to generate an electrical signal after a temperature of the permanent magnet material sample to be tested and a temperature in the temperature test box reach thermal balance at each of the temperature collection points, and recording a current temperature in the temperature test box and a corresponding magnetic moment data.

6 . A method for detecting Curie temperature of a permanent magnet material, the method being carried out by the device according to claim 3 , wherein the method comprises:

preheating the magnetic flux integrator;

setting the magnetic flux integrator to zero before placing the permanent magnet material sample to be tested in the temperature test box;

saturating and magnetizing the permanent magnet material sample to be tested and then connecting the permanent magnet material sample to be tested to a connecting rod, extending the permanent magnet material sample to be tested into the temperature test box through a piercing hole via the connecting rod, and locating the permanent magnet material sample to be tested at a center of the temperature test box;

setting a plurality of temperature collection points between a room temperature and a highest measured temperature, controlling a temperature in the temperature test box by the temperature control device to rise from the room temperature to each of the temperature collection points sequentially, drawing the detection coil or the permanent magnet material sample to be tested or rotating the permanent magnet material sample to be tested to generate an electrical signal after a temperature of the permanent magnet material sample to be tested and a temperature in the temperature test box reach thermal balance at each of the temperature collection points, and recording a current temperature in the temperature test box and a corresponding magnetic moment data.