Small ring NdFeB magnet for measuring instruments
Specifications:
1. Material: NdFeB N48
2. Size: D4x2x0.6mm
3. Coating: Zn
4. Magnetization: Axially magnetized
5. Highlights: subminiature dimension
6. Application: measuring instruments, etc.
1 High energy product: as high as 50MGOe is consistently available. This value of the maximum energy product exceeds that of the best SmCo magnets.
2 Low density of NdFeB: allows lighter and smaller designs for magnetic circuits. The density of NdFeB is 7.5g/cm3 and is more than 10% smaller than that of SmCo magnets.
3 Its mechanical strength: enables easier machining and handling than SmCo magnets. The bending strength and the tensile strength of NdFeB are approximately twice those of SmCo magnets.
4 No future’s concern of raw materials: NdFeB is made of neodymium, iron and boron, which are abundant on the earth.
5 NdFeB has a larger corrodibility than SmCo magnet under a high-temperature and high-humidity environment. Surface coating is necessary to protect NdFeB against corrosive atmosphere.
6 NdFeB has the larger temperature coefficients of the remanent magnetization (Br) and the coercivity (Hcj) than SmCo magnets. A careful consideration for working temperature and permeance is required on designing fabrication processes of a magnetic circuit for a full utilization of NdFeB’s high performance. NdFeB with high coercivities are large as 35KOe has been developed to offer an improved stability at high temperatures.
7 High price/performance ratio; the strongest attractive force.
8 Lower temperature coefficient: the routine NdFeB magnet’s temperature coefficient (βHcj) is -0.6%/℃, to improve this, we have developed the temperature coefficient (βHcj) -0.5%/℃ to make NdFeB have good stability of temperature, and then could be applied into more fields.