It’s complicated process including preparing formula powder, melting, milling, pressing, sintering, machining, plating, magnetization and inspection.
Preparing formula powder is most important process. Because technician can add additional elements to adjust magnetic properties, such as Cobalt (Co) for high temperature and Dysprosium (Dy) for better intrinsic coercivity.
Why Aintered Ndfeb Permanent Magnet is so Strong?
The smelting alloy ingot is made into powder by powder metallurgy process and is oriented and formed in the magnetic field. So after the molding embryo is sintered in an inert gas or vacuum to densify it, the sintered NdFeB has a very high magnetic energy product & coercivity, cost-effective, and has a good mechanical.
How Sintered Ndfeb Magnets Are Graded?
Do you know sintered neodymium-iron-boron magnets are rated according to maximum energy product. Look at our Specifications of Neodymium Magnets Page, you will find a rule that grade number 35 in the middle of (BH) maximum value 33-36 MGOe. Therefore, higher values indicate stronger magnets, ranging from N35 up to N55.
And letters following the number indicate maximum operating temperatures (often the centigrade temperature), ranging from M (100℃), H (120℃), SH (150℃), UH (180℃), EH200℃) to AH (220℃). If there is no letters following like N42, then the maximum operating temperature is 80℃.
What Kind of Coatings Available for Magnet?
Due to iron element in the sintered neodymium magnets, coating is a very important part of neodymium magnet. Although we can provide a variety of options for plating, nickel is still the most common and usually preferred.
Our nickel coated magnets are actually triple plated with layers of nickel, copper, and nickel again. This triple plating keeps our sintered neodymium magnets much more durable than the magnets with single nickel plated. Some other options for coating are zinc, tin, and plastic, epoxy, silver and gold. You can find more information from our Plating of Sintered Neodymium Magnet Page.
How Many Types of Magnet Shapes can We Make?
Our sintered neodymium iron boron magnets are customized in a variety of shapes including:
- Common shapes: disc, ring, cylinder, block, bar
- Irregular shapes: segment, countersunk, T shape, bread shape, triangle, oval, half disc
- Other custom shapes which can be realized by CNC precision machining
- Magnetic assemblies
Do We Make Magnetization Direction at Random?
Absolutely no, sintered ndfeb magnet is a kind of anisotropic magnet. The magnetic properties will be different by different pole direction. And there is always a direction that can get best magnetic force.
Find a complete summary of all our available magnetization directions for various magnet shapes on our Magnetization Direction page.
What is the use of sintered neodymium magnets?
Sintered NdFeB magnet can be used on all products under room temperature and some higher temperature to 200℃. The applications cover wind energy, oil energy, automobile, electronic industry, IT, medical, mining, audio-visual, sports, toys, stationery, printing, package, gifts and crafts etc.
China Magnets Source Material Ltd is a professional sintered neodymium magnet manufacturer. We make permanent rare earth sintered neodymium magnets at high quality and affordable prices and help you choose RIGHT MAGNET for your application, just click “SENT EMAIL“.