Samarium Cobalt Magnets
Samarium cobalt (SmCo) magnets are a type of rare earth magnet and are strong permanent magnets made from two basic elements: samarium and cobalt. The strength of SmCo magnets is generally similar to that of neodymium magnets [3], but with higher rated temperatures and higher coercivity. We can design and provide customers with suitable SmCo permanent magnet materials based on their products, including 1:52 type and 2:17 type, of which 2:17 type is divided into H series, T series, and L series products.
1:5 type SmCo
1:4 SmCo is the first generation of rare earth permanent magnet material. It is easier to saturate magnetization than the second generation 2:17 SmCo permanent magnet material. At the same time, 1:5 SmCo contains only two elements, Sm and Co. No other trace elements are added, which is suitable for products with restrictions on other elements.
2:17H Series SmCo
The Curie temperature of 2:17 type SmCo material is about 820℃, and the temperature coefficient of magnetic induction is low. It has good anti-demagnetization performance within 350℃. It also has better corrosion resistance than NdFeB and has a wide range of applications in high temperature environments. We can provide 32H in batches stably and have successfully developed 35H with Br>1.17T, Hk≥1353 KA/m performance.
2:17 Demagnetization curves at different temperatures for 35H, Br=1.17T at 20°C, Hk=1353KA/m
2:17 32H Demagnetization curves at different temperatures, Br=1.13T, Hk=1396KA/m at 20°C
T series Sm2Co17 is developed for extreme environments such as high-speed motors and complex electromagnetic environments. T series Sm2Co17 extends the upper temperature limit of permanent magnets from 350℃ to 550℃
T series demagnetization curve
2:17 Demagnetization curves of T350 at different temperatures, Br=1.06T at 20℃, and the BH curve is a straight line in the second quadrant at 350℃
2:17 Demagnetization curves of T500 at different temperatures, Br=1.01T at 20, and a straight line in the second quadrant of the BH curve at 500℃
2:17 Series Multi-Drill 2:17 Series smco
2: 17 Br and BH (Max) of the L series of 17-type samarium cobalt materials do not change much with increasing temperature, and are widely used in aviation, shipbuilding, medical, automotive and other industries. At present, our team has steadily mass-produced L22, Br29.5kGs, a (20-60℃) within 100ppm.
2:17 L22 demagnetization curves at different temperatures, Br=0.95T at 20°C, remanence temperature coefficient at 20-100°C is -0.01%/°C
2:17 Demagnetization curves of L26 at different temperatures, Br=1.03T at 20°C, remanence temperature coefficient at 20-100°C is -0.01%/°C
NdFeB magnetic materials
Neodymium magnets (also known as NdFeB, NIB or Neo magnets) are permanent magnets made from an alloy of neodymium, iron and boron, forming a Nd 2 Fe 14 B tetragonal crystal structure. They are the most widely used type of rare earth magnets. Depending on the manufacturing process used, NdFeB magnets can be divided into sintered magnets and bonded magnets.
We can calculate irreversible demagnetization and design the best solution according to customer product requirements and usage conditions, and have the full-process manufacturing capabilities of "batch-smelting-powdering-molding-sintering-processing". The company can stably supply high-performance NdFeB such as N56, 50SH, 52SH, 45UH, 42EH, 38AH in batches. Through the development and application of high-abundance rare earth technology, it has a higher cost-effectiveness in SH and lower performance grades. At the same time, the successful development of grain boundary diffusion technology enables us to produce NdFeB products with comprehensive performance (BH) max + Hcj> 75
Demagnetization curves of N50 SH at different temperatures, Br=1.40T at 20°C
Demagnetization curves of N38AH at different temperatures, Br=1.231T at 20°C
2:17 32H Demagnetization curves at different temperatures, Br=1.13T, Hk=1396KA/m at 20°C
Grain boundary diffused NdFeB
The grain boundary diffusion process can significantly reduce the use of heavy rare earths and save costs. At the same time, it can prepare sintered NdFeB materials with high comprehensive performance. We can provide G45EH, G48EH. G50UH, G52UH, etc. in stable batches.
Diffusion sintered NdFeB performance table
Demagnetization curve
Demagnetization curve of G54SH at different temperatures, 20℃ Br=1.46T
Demagnetization curves of G52UH at different temperatures, 20°C Br=1.42 T
Demagnetization curves of G48EH at different temperatures, 20° Br=1.38T
Anti-eddy current magnetic components
Under the trend of high speed and high frequency, NdFeB and SmCo magnets have low resistivity, eddy current loss and high heat generation. By dividing the magnets and bonding them with insulating glue, the eddy current loss of the magnets can be effectively reduced and the temperature rise can be reduced. The thickness of the conventional laminated adhesive is about 0.08mm, which can achieve an insulation layer thickness of 0.03mm, a magnet monomer thickness of 1mm, and an overall resistance of >200M2.
