Square sintered NdFeB magnets, like other NdFeB magnets, are composed of specific elements that contribute to their magnetic properties. The main ingredients include:

Neodymium (Nd): Neodymium is a rare-earth element and a key component of NdFeB magnets. It provides the magnetic strength necessary for these magnets.

Iron (Fe): Iron is another essential element in NdFeB magnets, contributing to the magnetic properties and stability of the material.

Boron (B): Boron is added to enhance the magnetic properties of the magnet, improving its coercivity and energy product.

Other Trace Elements: NdFeB magnets may also contain small amounts of other elements to fine-tune their properties during the manufacturing process. Commonly, elements like dysprosium and praseodymium are added to improve the high-temperature performance and reduce the susceptibility to demagnetization.

The exact composition can vary based on the specific grade of the NdFeB magnet. Different grades have different ratios of these elements to achieve desired magnetic properties. Additionally, the manufacturing process, including the sintering process, helps in creating the final magnet structure and properties.