The Complete Guide of FERRITE MAGNETS: CHEAP AND RESISTANT MAGNETS
Ferrite Magnets are the cheapest option among commercially available magnets. They are very resistant to high temperatures and corrosion. Even a standard Ferrite Magnet can operate and do not demagnetize at a temperature of up to 250°C.
They can be used in humid environments or underwater without any issue, because they do not suffer from oxidation and rust. They resist very well even in salt water.
Unlike other ferromagnetic materials, most Ferrite Magnets are not electrically conductive.
These magnets are dark grey in color and appear less polished than the Neodymium ones. They are also called raw magnets, hard ferrite magnets, ceramic magnets or ceramic permanent magnets.
More about Ferrite Magnets
Ferrite is a ceramic material made a large proportion of iron oxide (Fe2O3) blended with one or more additional metals, like strontium, barium, manganese, nickel or zinc. Ferrite Magnets are ferrimagnetic, so they can be magnetized (becoming a magnet) or be attracted to a magnet. Unlike other ferromagnetic materials, standard ferrite is not electrically conductive.
Hard ferrite, the one we use for our magnets, has a high coercivity, a property that makes it difficult to demagnetize. Ferrite Magnets are hard but quite brittle. Their density is about 5 g/cm3.
Ferrite Magnets are not as strong as Neodymium Magnets. They typically offer about 1/7th of the pulling force of similar size N35 Neodymium Magnets.
Ferrite Magnets Uses and Applications
Most common applications for Ferrite Magnets are the following:
High Temperatures Environments;
Deferization: removal of metallic parts from powders or materials;
Motors, generators, alternators;
The Complete Guide of FERRITE MAGNETS
FERRITE MAGNETS PRICE
What’s the price of Ferrite Magnets?
Ferrite Magnets are the cheapest commercially available magnets. Compared to standard Neodymium Magnets of equal size, they can be 10 times cheaper. But you must consider that, given the lower magnetic strength, you will need a larger Ferrite Magnet to get the same performances.
What’s the price of Ferrite Magnets compared to Neodymium Magnets?
On average Ferrite Magnets are nearly 10 times cheaper than ferrite magnets. The final price can swing greatly depending on various factors like the size of the order or the market cost of raw materials. Iron in used in both kinds of magnets, but Neodymium Magnets contain also relevant quantities of rare earth elements, whose price is gone up quite significantly in recent years.
Here is a table of reference of the cost for a 20x3mm magnetic disc made of Neodymium or Ferrite:
Quantity Neodymium Price Ferrite Price
1 – 30 2,05€ 0,22€
31 – 80 1,64€ 0,17€
81 – 180 1,19€ 0,14€
181 – 350 0,96€ 0,12€
351 – 600 0,78€ 0,09€
What is the Heat Resistance of Ferrite Magnets?
Ferrite Magnets can withstand temperatures up to 250 °C without being damaged or suffer demagnetization. Compared to SmCo and AlNiCo Magnets, they are a good alternative at a more competitive price. They are also very resistant to corrosion, humidity and oxidation.