All neodymium magnets available in our store can be found on the list below.
Currently, we offer the following shapes of neodymium magnets:
Sintered neodymium-iron-boron magnets (NdFeB), also commonly known as neo magnets, have been available in trade since 1984. They offer the highest energy of all existing materials and are available in a wide range of shapes, sizes, and grades. Applications include voice coil motors (VCMs) in hard disk drives, automotive motors, Hi-Fi systems, high-performance motors, brushless DC motors, magnetic separation, MRI, sensors, and other magnetic tools.
Sintered neodymium magnets (NdFeB) began development in the late 1970s and became commercially available in the early 1980s. Initially, their energy range was from 14 MGOe to 18 MGOe. Currently, their energy range is from 30 MGOe to 52 MGOe, and who knows what tomorrow will bring. The operating temperature ranges from -40°C to a maximum of 230°C, depending on the grade. Sintered neodymium-iron-boron magnets (NdFeB), also commonly known as neo magnets, have been available in trade since 1984. They offer the highest energy of all existing materials and are available in a wide range of shapes, sizes, and grades. Applications include automotive steering columns, EPS motors, sensor magnets, as well as voice coil motors (VCMs) in hard disk drives, Hi-Fi systems, high-performance motors, brushless DC motors, magnetic separation, MRI, sensors, and other magnetic tools.
The production of neodymium magnets relies on two methods: the powder metallurgy method used in Japanese companies and the technique of rapid cooling that gained popularity in the United States. Depending on the requirements, neodymium magnets can be produced by incorporating additional elements, such as copper, aluminum, or gallium, to adjust the magnetic parameters of the magnet itself, including its strength and resistance to high temperatures and corrosive conditions. Continuous improvement in metallurgical processes has led to the development of various material alloys, significantly increasing the Curie temperature of neodymium magnets. Modern production of neodymium magnets allows them to achieve magnetization levels exceeding 1.6T, much higher than the Earth's magnetic field, thanks to advancements in powder metallurgy.
Magnets made of neodymium are often equipped with protective coatings that prevent corrosion and protect from adverse weather effects by applying a copper or nickel layer, for example, in magnetic holders used for searching in lakes, rivers, and seas. Engineers are constantly developing new neodymium magnet types, and through continuous progress in powder metallurgy, previously unknown metal alloys with elevated coercivity and Curie temperature exceeding 1.6T are being devised.
A nano-crystalline magnetic material with a nano-crystalline structure consisting of grains with a diameter less than 100 nm was developed. The nano-crystalline grains, in contrast to monocrystalline structure, are separated by larger spaces with higher surface power and more disordered internal structure. By utilizing the mixture of rare earth elements along with iron during the sintering process, the nano-crystalline magnets exhibit high magnetic remanence properties. The excellent magnetic properties are also due to the magnetic moment coupling between neodymium and iron. This enables the great magnetization of described magnets.
The magnetic flux density refers to the amount of magnetic flux per unit area. Although the magnetic flux density will become slightly stronger when two magnets are vertically stacked on top of each other, the surface area remains the same, so there won't be a significant difference. For example, if two magnets with the size of 10mm x 10mm are placed on top of each other, the magnetic flux density will be almost the same as that of a single magnet with the size of 10mm x 10mm.
Neodymium magnets can be produced as sintered magnets or as bonded magnets using plastic or resin as a binder.