We often see a variety of magnets, which are made of different materials and have different scopes of use. The following is the classification and characteristic analysis of the main product types.
Neodym Magnet other magnetic materials, Neodym Magnet has outstanding magnetic performance advantages, with high remanence (Br), high intrinsic coercivity (Hcj) and high magnetic energy product (BHmax).
Its products are widely used in automotive parts, variable frequency energy-saving air conditioners, wind power generation, 3C, industrial energy-saving motors, energy-saving elevators and other fields.
The company has been developing grain boundary diffusion technology since 2013. After 10 years of development, it currently has the production capacity of N54SH, N52UH and N50EH.
Alnico magnets are the oldest series of permanent magnets, produced and used since the 1930s. They are produced in two forms: casting and sintering. The grades range from 2.0MGOe to 9.0MGOe.
Cast Alnico permanent magnets have the lowest reversible temperature coefficient and the operating temperature can reach above 550 degrees Celsius, so they are widely used in various instruments and other applications. Among them, the (BH)max of oriented type 8 can reach 13MGOe, and it has the processing capability of complex shapes and high dimensional shape and position accuracy products, and can realize the special requirements of multi-pole orientation and circular orientation of product heat treatment, multi-pole magnetization and radiation magnetization of plane, inner circle and outer circle of specific products, etc.
Ferrite magnets are made by mixing ferrite powder and resin (PA6/PA12/PPS) through injection molding.
They are mainly used in automation equipment, permanent magnet DC motors, variable frequency air conditioning motors, instrument motors and other fields. They are indispensable signal sources and constant magnetic sources for precision micro motors and automation industries, and have advantages that cannot be replaced or matched by other magnets.
SmCo Mangnet is the second generation of rare earth permanent magnets, mainly composed of metal samarium (Sm), metal cobalt (Co), copper (Cu), iron (Fe), zirconium (Zr) and other elements.
From the structural type, it can be divided into 1:5 type and 2:17 type. From the performance characteristics, it can be divided into three types: high magnetic energy product samarium cobalt, low temperature coefficient (-0.008%/℃: 20~200℃) samarium cobalt and high temperature resistant (500℃) samarium cobalt.
Since samarium cobalt has the characteristics of high magnetic properties, good temperature stability and corrosion resistance, it is widely used in the automotive industry, energy-saving electrical appliances, communications and other fields.
Summarize
Therefore, there are many types of magnets. The rare earth elements contained in each magnet are different, and their operating temperatures, magnetic properties, and application scenarios are also different.