What are the types and classes of neodymium magnets?
Neodymium magnets, known for their remarkable strength, are available in various grades, such as N38, N52, or N42SH. Each grade represents different strength and temperature resistance, crucial in industrial and consumer applications. The numerical part of the class designation, like '38' in N38, refers to the magnet's maximum energy product, expressed in megagauss-oersteds (MGOe). The higher this number, the stronger the magnetic properties of the magnet. Additional letters, such as 'SH', indicate the magnet's resistance to high temperatures. Magnets labeled 'SH' are more resistant to magnetism loss at higher temperatures, which is extremely important in applications requiring operation in challenging environmental conditions. With this diversity, neodymium magnets find wide applications, from small electronic devices, through automotive accessories, to large industrial machines and equipment.
What does the "N" number and "SH" addition mean in the name of a neodymium magnet class?
The classification of neodymium magnets is based on designations like "N42" or "N52". The letter 'N' signifies the material, neodymium, while the number indicates the strength of the magnet. These numbers come from the maximum energy product of the magnetic material, expressed in MGOe (Mega Gauss Oersteds), which is a measure of magnetic strength. Additional designation, like 'SH', indicates a higher temperature resistance of the magnet, which is important in applications where magnets are exposed to higher temperatures.
What are the magnetic characteristics of different neodymium magnet classes?
Different classes of magnets, such as N35, N38, N40, N42, N45, N48, N50, N52, have various magnetic parameters:
Residual flux density (Br) ranges from 11.7 to 14.8 KGs.
Coercive force (Hc) exceeds 11.0 KOe.
Intrinsic coercive force (Hci) usually exceeds 12 KOe.
Maximum energy product (BH)max ranges from 33 to 52 MGOe.
These parameters determine both the magnetic strength of the magnet and its resistance to demagnetization.
What are the thermal characteristics of neodymium magnets?
Magnets made of neodymium are sensitive to temperature, and their maximum operating temperature and Curie temperature vary for different classes:
The maximum operating temperature ranges from 80°C to 220°C.
The Curie temperature ranges from 310°C to 662°C.
What are the physical and mechanical characteristics of neodymium magnets?
Właściwości fizyczne i mechaniczne magnesów neodymowych:
Gęstość: 7,40-7,70 g/cm³.
Twardość Vickersa (HV): 500-700 HV.
Wytrzymałość na ściskanie: 1000-1100 MPa.
Wytrzymałość na rozciąganie: 80-90 MPa.
Wytrzymałość na zginanie: 150-400 MPa.
Przewodnictwo cieplne: 8-10 W/(m·K).
Moduł Younga: 150-200 GPa.
Rezystywność elektryczna: C∥1,4-1,6 μΩ·m, C⊥1,2-1,4 μΩ·m.
Te właściwości są szczególnie istotne w zastosowaniach inżynieryjnych i przemysłowych, gdzie magnesy są narażone na różne siły zewnętrzne.
What are measurement systems and conversions between systems?
Measurement systems are used to measure the properties of magnets, including the CGS system, SI system, and the English system. For example, 1 Oe (Oersted) in the CGS system is equal to 79.62 A/m (Amperes per meter) in the SI system, and 10,000 Gauss (G) is equal to 1 Tesla (T).
Technology of magnet production...
Neodymium magnets are incredibly strong and find applications in various fields, from industry to everyday use. Their selection is based on an understanding of their classification, physical, mechanical, and thermal properties, as well as matching them to specific needs and environmental conditions. Knowledge of these properties allows for optimal utilization of the potential of neodymium magnets in various applications.
For more information about the production technology of neodymium magnets Nd2Fe14B, you can find it on our website, where we describe this process in detail.
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#magnets#neodymiumpiątek 2023-10-20T18:00:00