Rare Earth Magnet for Magnetic Drive Pump

Magnetic Drive Pump solved work under corrosive, inflammable, explosive, toxic, leakage, and clean liquid environment. Permanent magnet in the magnetic drive pump refers to coupling magnet. Magnetic drive pump makes full use of performance of magnetic force on ferrous material and non-ferrous material.

The first generation magnet on pump magnet is ferrite magnet. It’s cheap and wide source. Due to poor magnetic performance, it limits the development of magnetic drive pump. The second generation magnet is samarium cobalt magnet and AlNiCo magnet. These two materials are better than ferrite, and let magnetic drive pump achieve large torque. But their cost is very high because material samarium and cobalt which used in smco and alnico are rare and strategic resource. It also restricts pump development. The third generation Sintered NdFeB magnet with (BH)max 207 kJ/m³ to 422 kJ/m³ is an ideal material for magnetic drive pump. Sintered NdfeB magnet is the strongest magnet which can reduce the volume of pump and its material Fe and Nd is rich than samarium, so price is affordable. It helps magnetic drive pump get the market finally.

China Magnets Source Material Limited is able to manufacture different kinds of high performance magnets for magnetic drive pumps. You are welcome to contact us for more information. Our engineers also are ready to provide technical assistance.

Price of Magnet is Keeping Increasing And No Reduction Nowadays

As we all know, the rare earth (the raw material of magnet) is non-renewable resources. 

However, China has exported the magnets at low price over 10 years. 
Now the goverment has to regluate and control the rare earth mine and the whole rare earth industry because of the rare earth will be less and less day by day.
So price of magnet is keeping increasing and no reduction nowadays. 

Overview on the Worlds’ Magnet Supply

 

China: Ferrites 60%, Neo 70%, SmCo 70%, Alnico 50%, Bonded magnets 25% 

Japan: Ferrites 20%, Neo 20%, Bonded magnets 20% 

India: Ferrites 5% 

Thailand: Bonded magnets 20% 

USA: Ferrites 10%, SmCo 10%, Alnico 20%, Bonded magnets 10%, 

Europe: Neo 10%, SmCo 10%, Alnico 20%, Bonded magnets 15%

How to choose a magnetic material? By china-magnets-source-material.com

When choose a magnet material, you need to figure out the requirement you need magnet to do in your application, but not blindly pursue high performance magnetic material; and then get a comprehensive understanding of different magnetic materials. If you have confusion on some point, you can ask for technical help from magnet specialist or manufacturer.

Material	Magnetic Property	Working Temperature	Corrosion Resistance	Price	Remark
NdFeB Magnet	high	low	low	high	1
Ferrite / Ceramic	middle	middle	high	low	3
SmCo Magnet	high	high	high	high	2
AlNiCo Magnet	low	high	high	middle	4

Ferrite and ndfeb magnet can be processed by sintering or bonding method. The Sintered magnet has high magnetic force, but poor formation. The bonded magnet has good formation, but low property.
Alnico can be processed by casting and sintering, the cast alnico has high property, but poor formation. The bonded alnico has good formation, but low property.

This is a brief introduction for choosing magnetic material, for more information, please visit our website www.china-magnets-source-material.com

What is magnetic material? by china-magnets-source-material.com

Magnetic material is one of three fundamental functional materials in the industry. 

It was divided in two types based on magnetic properties: soft magnet and hard magnet (also named permanent magnet). Both are easy to get magnetized. The difference is: hard magnet can stay magnetized for long time with high coercive force; soft magnet has low coercive force, so lost its magnetic force easily.

Soft magnet: steel and iron, soft ferrite and high iron amorphous materials

Hard magnet: Sintered Neodymium Magnet, BondedNeodymium Magnet, AlNiCo, Samarium Cobalt Magnet, Ferrite (due to rare earth material content, they are also called rare earth magnets except ferrite)