How to perform accurate magnetic properties test on Special Shaped NdFeB Magnet?

To perform accurate magnetic properties test on Special Shaped NdFeB Magnet, you can follow the following steps and considerations:

Choose the appropriate test method:
For thin samples (such as those with a thickness of more than 1.2mm), the C-750 electromagnet method (IEC60404-5 hard magnetic material measurement method) produced by Magnet in Germany can be used. This method is suitable for measuring samples with an intrinsic coercive force below 2500kA/m.
For samples with higher intrinsic coercive force, it is recommended to use the PFM14 solenoid pulse method (IEC TR 62331 pulse magnetic field magnetic measurement method) produced by Hirst in the UK to measure open circuit samples.
Consider the characteristics of the sample:
Due to the special shape of NdFeB magnets, it may be necessary to prepare or adjust the sample appropriately before testing to ensure the accuracy of the test results.
Choose the suitable test method based on the intrinsic coercive force and thickness of the sample.
Follow the test standards:
Refer to the provisions of national standard GB/T3217-2008 and international standard IEC404-5, perform pre-saturation magnetization, and then test the performance of the sample.
Ensure that the test process complies with relevant standards and specifications to improve the reliability and accuracy of the test results.
Test magnetization curve:
The magnetization curve can be obtained by directly testing the BH curve of one quadrant. Test without magnetization (or considering thermal demagnetization treatment).
Analyze the magnetization curve and hysteresis loop to understand the magnetization behavior of the sample under different magnetic field intensities.
Consider the accuracy and stability of the test equipment:
Choose high-precision test equipment to ensure the accuracy of the test results.
During the test, pay attention to the stability and repeatability of the equipment to avoid the influence of equipment errors on the test results.
Data analysis and interpretation:
Analyze the test data in detail to understand the magnetic performance parameters of the sample, such as residual magnetic induction, coercive force, intrinsic coercive force and magnetic energy product.
Combined with the characteristics and application scenarios of the sample, the test results are reasonably interpreted and evaluated.
Consider other influencing factors:
Temperature, magnetic field uniformity, test environment and other factors may affect the test results. During the test, it is necessary to pay attention to the changes of these factors and take corresponding measures to control and adjust them.
In summary, accurate magnetic performance testing of Special Shaped NdFeB Magnet requires selecting appropriate test methods, following test standards, considering sample characteristics and the accuracy and stability of test equipment, and conducting detailed analysis and interpretation of test data.