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The Difference Between Bonded Neodymium Iron Boron And Sintered Neodymium Iron Boron
2024-09-30
The main differences between bonded neodymium iron boron and sintered neodymium iron boron are production process, physical properties, application areas, as well as cost and price. 12 Production process: Bonded neodymium iron boron is made by mixing rapidly quenched NdFeB magnetic powder and binder, and then by "pressing molding" or "injection molding". This type of magnet contains a binder, and its density is generally 80% of the theoretical density. In contrast, sintered neodymium iron boron adopts powder metallurgy process, which pulverizes the melted alloy and compresses it into a compact in a magnetic field, and then sinter it in inert gas or vacuum to achieve densification.
Physical properties: Bonded neodymium iron boron has high mechanical strength and can be formed simultaneously with other supporting components during molding. It has high dimensional accuracy and is suitable for making magnetic components with complex shapes. Sintered neodymium iron boron is a hard and brittle material with high processing difficulty, poor dimensional accuracy, poor corrosion resistance, and requires surface electroplating treatment.
Application areas: Bonded neodymium iron boron is widely used in office automation equipment, electrical equipment, audio-visual equipment, instruments and meters, small motors, measuring instruments and other fields. Because it can be molded in one go without secondary processing, it can be made into complex magnets of various shapes. Sintered neodymium iron boron is widely used in fields such as electronics, power machinery, medical equipment, toys, packaging, hardware machinery, aerospace, etc. due to its excellent magnetic properties.
Cost and price: The price of bonded neodymium iron boron is relatively cheap because its production process is relatively simple and has fewer steps. The process of sintering neodymium iron boron is complex and costly.
In summary, there are significant differences between bonded neodymium iron boron and sintered neodymium iron boron in production processes, physical properties, application areas, as well as costs and prices, which determine their selection and use in different application scenarios.
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