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Tech Briefs

NdFeB Magnet Patents

April 7, 2021, NdFeB magnets, compositions and processing technologies have been the subject of controversy ever since its announcement and the key inventive claims were filed over 40 years ago. …

Permanent Magnets; Materials, Applications and Economics Issue S

October 24, 2018, While it’s true that most permanent magnet (PM) material ever commercialized (except Lodex for obvious environmental and safety reasons) are still in some limited use today there …

The Application of Permanent Magnets in Magnetic Sensors

June 20, 2016, Permanent magnets are ubiquitous in modern societies. Devices which use permanent magnets include motors, sensors, actuators, and acoustic transducers, just to name a few Tech Brief …

Bonded Magnet Materials and Processing Options

July 28, 2016, Bonded magnets are an important but often overlooked group of products that magnetic circuit and device designers should consider when choosing the optimum permanent magnet type for th…

NdFeB magnets: Where is the Next Breakthrough Permanent Magnet Material?

By Dr. John OrmerodTechnical Adviser / Magnet Applications IntroductionIt’s interesting to note that no major new permanent magnet material has been introduced since NdFeB in the 1980’s; in fact,…

Types of Rare Earth Magnets: Part 1

Fully Dense Rare Earth Magnets by Powder Metallurgical Processing By Dr. John OrmerodTechnical Adviser / Magnet Applications The powder metallurgical method is the most common method of manufacturing…

Types of Rare Earth Magnets: Part 2

Melt Spun/Jet Milled Isotropic Bonded Magnets By Dr. John OrmerodTechnical Adviser / Magnet Applications In the early 1980’s, General Motors Corporation (later Magnequench) pioneered the use of…

Types of Rare Earth Magnets: Part 3

MQ3 Fully Dense NdFeB Magnets By Dr. John OrmerodTechnical Adviser / Magnet Applications Fully dense NdFeB magnets can also be produced from melt spun powders by a combination cold pressing, hot pre…

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