Category Archives for "Knowledge"

Grain Boundary Diffusion- Conserving HREE in NdFeB Magnets

Grain Boundary Diffusion is an important new advance in Neodymium magnet production technology. Heavy Rare Earth Elements (HREE) are delivered directly to critical areas of the magnet’s microstructure. These areas are where HREE are the most effective at increasing the properties of the magnet to withstand high opposing magnetic fields at high temperatures. HREE have […]

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Magnetic Anisotropy

Magnetic Anisotropy is the capacity of a magnet to maximize its magnetic orientation in the direction of its poles, and it is similar to general anisotropy of other material characteristics.Strong permanent magnets – especially sintered Neodymium magnets- have had their magnetic domains oriented in the direction of the easy axis to maximize their strength. Anisotropy is […]

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Coercivity or Coercive Force

Coercivity is the resistance of a magnetic material to an opposing external magnetic field. There are two different kinds of Coercivity- Hcb and Hcj. The higher the Coercivity number, the higher the magnet’s resistance to the opposing field.Hcj vs HcbHcb is Normal Coercivity and Hcj is Intrinsic Coercivity.The Difference between Hcj and HcbHcb – is called […]

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Neodymium vs Ferrite Magnets

A central question that comes up in a magnet trade study is how to decide whether to use a Neodymium magnet or a Ferrite magnet for a particular application. A trade study that seems very simple at first glance can quickly become more complex once all the factors are considered. Designers who want to optimize their […]

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How Are Neodymium Magnets Made?

Neodymium magnets are made by a sophisticated process that includes some very high-tech metallurgical methods comprising powder metallurgy and advanced process metallurgy.

Dozens of process steps must be followed very precisely to make Neodymium magnets –also known as NdFeB -for the chemical symbols of Neodymium, Iron and Boron.

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Small NdFeB Magnets in Smartphones and Personal Electronics

Small NdFeB Magnets in SmartphonesNeodymium (NdFeB) magnets are an invisible part of every smart phone. These tiny magnets are critical to the function of the phone, working quietly behind the scenes inside the phone case.  These internal magnets are typically used in the speaker, receiver, vibration mode motor, taptic feedback motor, and camera auto-focus mechanism. […]

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Understanding Coercivity

When we apply an outside magnetic field to a magnetic material, we are forcing it -coercing it- to become magnetized.  Now that it is magnetized, how much of an applied field is required to demagnetize the material?  When we measure the applied field that either magnetizes or demagnetizes the material, we measure the Coercivity of […]

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Understanding Remanence

Remanence is the remaining magnetic field found in the material after the applied magnetic field is reduced to zero.  Remanence is derived from the same word as “remainder” or “remaining” so we can think of Remanence as the magnetic field that remains in the material after the outside magnetic field has been released.Remanence is also […]

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