The performance of high-performance magnets is heavily influenced by the purity and quality of the raw materials.
First, purity is a key factor. Neodymium (Nd) is an important component of neodymium-iron-boron magnets. High-purity neodymium ensures that the magnet has a high magnetic energy product. Magnetic energy product is an important index to measure the performance of magnets, which represents the ability of magnets to store energy.If the purity of neodymium is low, other elements doped in neodymium will interfere with the ordered arrangement of magnetic ions.
For example, when there are more impurity atoms, they will occupy the position of the original magnetic ions or change the lattice structure, so that the exchange interaction between magnetic ions is weakened. This change in interaction results in a decrease in the remanence and coercivity of the magnet. Remanence refers to the magnetic induction that the material still retains when the external magnetic field disappears after magnetization to saturation. Coercivity is a physical quantity to measure the ability of materials to resist demagnetization.
In terms of quality, the particle size and uniformity of raw materials also have an important impact on the performance of high-performance magnets. If the particle size of the raw material is not uniform, the internal structure of the magnet will be uneven during the sintering process. Large and small particles are packed in different ways, resulting in local density differences.In this case, the conduction and distribution of the magnetic field will be hindered, so that the overall magnetism of the magnet can not be fully developed.
High-quality raw materials have good particle uniformity and can form a compact and orderly microstructure during the manufacturing process, which helps to improve the coercivity and permeability of magnets.
In addition, the quality of raw materials also includes its internal defects. For example, lattice defects, pores, etc. In the raw material can reduce the mechanical and magnetic properties of the magnet. Lattice defects can destroy the orderly arrangement of magnetic ions, just like the emergence of chaotic individuals in a neat team, affecting the transmission and synergy of magnetism. The existence of pores will scatter the magnetic field when it passes through, which weakens the effective magnetic field strength.
To sum up, the purity and quality of raw materials are the important basis for the performance of high-performance magnets. Only by ensuring the purity and quality of raw materials, can high-performance magnets with good performance be manufactured.
