The history of NDFEB magnets
NDFEB magnets are the most powerful and widely used forms of rare earth magnets. They are made from an alloy consisting of Nickel, iron and Cobalt. They undergo a number of preparatory processes before the final magnet is available to sell in the market.
The motive behind the development of the NDFEB magnets was to find a strong rare earth magnet with properties better than the existing magnetic materials. The companies responsible for the development of the NDFEB were General Motors and another Sumotomo Company. The primary cause for concern was that the materials required for making Samarium Cobalt rare earth magnets were very expensive.
The thrust was towards finding a new material capable of replacing the need for samarium cobalt.
The two companies went about to produce different forms of NDFEB magnets. General Motors developed nanocrystalline NDFEB while Sumitomo Corp.
Developed sintered NDFEB magnets. Sintered NDFEB magnets are a bit susceptible to corrosion.
How are NDFEB magnets manufactured?
There are primarily two techniques for manufacturing NDFEB magnets, each producing a different type of a magnet.
Let us look at the two processes in detail:
Sintered magnet process: This process was developed by the Sumitomo corp. The process involves an ingot being pulverized. Magnetically aligned particles are then sintered in the liquid phase and then are given their desired shape in this process.
China and Japan are the primary producers and exporters of sintered NDFEB magnets.
Bonded magnet process: This method was initially developed by the General Motors and Company of the United States. It involves a method called melt spinning. Melt spinning of a thin ribbon of NDFEB is required.
The method includes pulverization of the ribbon and compression moulding applied to mould it into any desired shape. The NDFEB magnet produced is nanoctystalline.
The bonded magnets may not be as strong as the sintered form, but it is easier to get mould them into desired shapes and do not have eddy current losses. America is the primary producer of bonded NDFEB magnets.
NDFEB magnets, applications and hazards
NDFEB magnets have widespread applications due to their very high coercivity and anisotropy.
The high power of NDFEB magnets make them ideal for a lot of applications.
Some popular applications of the magnets include loudspeakers, headphones, microphones, magnetic resonance imaging, hard drives, motors, jewellery, toys, etc.
However, being extremely powerful, there are some hazards with NDFEB magnets not seen with traditional magnets.
Large pieces of NDFEB magnets are so powerfully attractive that they may cause injury.
Also, NDFEB magnets can harm data on hard drives, compact disks, credit cards etc if they are brought too close to them.
Showing posts with label Neodymium magnets. Show all posts
Showing posts with label Neodymium magnets. Show all posts
Neodymium Rare Earth magnets
Why do we need Neodymium Rare Earth magnets?
Man has always been fascinated by magnets. Their power to attract pieces of iron had been one of the mysteries of the ancient world. Magnetism was something no one truly understood, but it was something to be revered.
As Man begun understanding magnetism, so its applications increased in the various walks of life. It was magnets in the ancient world that helped sailors find their directions with compasses. Magnets had always been known for possessing a power to heal. This was known and practiced by the early Chinese.
Magnets eventually found their way into the heart of almost every device imaginable. Ranging from the electric motors and transformers to latest computers, all employ magnetism. Permanent magnets are ubiquitously present in almost all electronic devices.
With development in applications of magnets, also came development of magnetic materials. The old iron magnets of old have now been replaced by much more powerful ones. The most powerful magnets today are Neodymium Rare Earth magnets.
Neodymium Rare Earth magnets are characterized by their incredibly strong magnetic field coupled with their inexpensive price.
What exactly are Neodymium Rare Earth magnets?
Neodymium Rare Earth magnets are the strongest and most popular type of rare earth magnets. They are made from an alloy consisting of Nickel, Iron and Boron. The structure formed has a crystalline structure which helps in formation of the magnetic poles in the material. Neodymium magnets are extremely strong and have replaced most of the earlier magnets. Their incredible magnetic field is down to their extremely high magnetic coercivity and anisotropy.
The magnetic field of Neodymium Rare Earth magnets is about 1.5 Tesla (unit of magnetism) while that of traditional ferrite magnets is about 0.5 tesla. Neodymium magnets are manufactured by either the sintering technique or the rapid solidification or bonded magnet process.
Property differences among Neodymium Rare Earth magnets may be due to the amount of nickel, iron and boron present in the alloy, manufacturing processes, etc.
Where are Neodymium Rare Earth magnets used?
Neodymium Rare Earth magnets have replaced ferrite or alnico permanent magnets in almost all fields.
They are especially effective in situations where high magnetic power is required in a low corrosion environment. This makes them ideal for use as:
- Actuators in hard disk drives
- Loudspeakers, microphones and headphones
- Magnetic Resonance Imaging (MRI) used in medical purposes
- Permanent motors of different kinds
- Magnetic jewellery
- Children’s toys
These and other applications of Neodymium Rare Earth magnets have made them a big success.
Man has always been fascinated by magnets. Their power to attract pieces of iron had been one of the mysteries of the ancient world. Magnetism was something no one truly understood, but it was something to be revered.
As Man begun understanding magnetism, so its applications increased in the various walks of life. It was magnets in the ancient world that helped sailors find their directions with compasses. Magnets had always been known for possessing a power to heal. This was known and practiced by the early Chinese.
Magnets eventually found their way into the heart of almost every device imaginable. Ranging from the electric motors and transformers to latest computers, all employ magnetism. Permanent magnets are ubiquitously present in almost all electronic devices.
With development in applications of magnets, also came development of magnetic materials. The old iron magnets of old have now been replaced by much more powerful ones. The most powerful magnets today are Neodymium Rare Earth magnets.
Neodymium Rare Earth magnets are characterized by their incredibly strong magnetic field coupled with their inexpensive price.
What exactly are Neodymium Rare Earth magnets?
Neodymium Rare Earth magnets are the strongest and most popular type of rare earth magnets. They are made from an alloy consisting of Nickel, Iron and Boron. The structure formed has a crystalline structure which helps in formation of the magnetic poles in the material. Neodymium magnets are extremely strong and have replaced most of the earlier magnets. Their incredible magnetic field is down to their extremely high magnetic coercivity and anisotropy.
The magnetic field of Neodymium Rare Earth magnets is about 1.5 Tesla (unit of magnetism) while that of traditional ferrite magnets is about 0.5 tesla. Neodymium magnets are manufactured by either the sintering technique or the rapid solidification or bonded magnet process.
Property differences among Neodymium Rare Earth magnets may be due to the amount of nickel, iron and boron present in the alloy, manufacturing processes, etc.
Where are Neodymium Rare Earth magnets used?
Neodymium Rare Earth magnets have replaced ferrite or alnico permanent magnets in almost all fields.
They are especially effective in situations where high magnetic power is required in a low corrosion environment. This makes them ideal for use as:
- Actuators in hard disk drives
- Loudspeakers, microphones and headphones
- Magnetic Resonance Imaging (MRI) used in medical purposes
- Permanent motors of different kinds
- Magnetic jewellery
- Children’s toys
These and other applications of Neodymium Rare Earth magnets have made them a big success.
Radially magnetized ring magnets
What are radially magnetized ring magnets?
Since the advent of the industrial age man has been on a relentless run of progress. He has undertaken daring projects and built on so many of his innovative ideas that we are surrounded by technology in our present day lives. He built factories and machines to help to build more and bigger factories and machines during the industrial age.
Then came the age of computers and he secluded himself to an office corner to do his work. But his thirst for knowledge was hardly quenched. This innovation and technology which entails such ease of living came at a high price to the earth.
Man turned to the earth’s underbelly, rich with minerals and metals and oil and various other things. He dug them all up and used them to fuel his need for progress.
One such natural resource is magnets. We use them a lot in our daily lives. Here we discuss a very special type of magnets called the radially magnetized ring magnets.
How are radially magnetized ring magnets made?
Radially magnetized ring magnets may be made of many materials. One can use soft iron cores to make such magnets. Also one can use rare earth materials to make such magnets. Such magnets are very strong because of the strong magnetic properties of the rare earth metals. One such component which can be used to make magnets is NIB (NdFeB) or neodymium alloys.
The alloys are passed through different types of treatment to make them into ring magnets. Radially magnetization of ring magnets is particularly hard as these materials tend not to stay together and suddenly may gain multipoles.
The alloys are passed through a hot pressing facility where it is grinded to powder form and then melted and solidified to form the radial shape and to lose its magnetic polar properties.
Then the ring shaped alloy undergoes a specialized backward extrusion process where it is electrically charged and treated to form the radial magnetized ring magnet of super high strength.
This process results in radial magnetization as the magnetic pole are on the flat surfaces of the ring. These magnets are still very prone to chipping and rusting if the iron is exposed to air.
Hence they need to be coated to prevent corrosion. Also because of their high strength they need to be handled with extreme care as they may cause damage to the human body.
Where are radially magnetized ring magnets used?
These radially magnetized ring magnets of rare earth metals can come in various sizes, very small to large. Hence they find a wide range of applications in toys, servo motors and other small and powerful devices where high magnetic flux densities are required.
These magnets simplify rotor construction to a great extent.
Since the advent of the industrial age man has been on a relentless run of progress. He has undertaken daring projects and built on so many of his innovative ideas that we are surrounded by technology in our present day lives. He built factories and machines to help to build more and bigger factories and machines during the industrial age.
Then came the age of computers and he secluded himself to an office corner to do his work. But his thirst for knowledge was hardly quenched. This innovation and technology which entails such ease of living came at a high price to the earth.
Man turned to the earth’s underbelly, rich with minerals and metals and oil and various other things. He dug them all up and used them to fuel his need for progress.
One such natural resource is magnets. We use them a lot in our daily lives. Here we discuss a very special type of magnets called the radially magnetized ring magnets.
How are radially magnetized ring magnets made?
Radially magnetized ring magnets may be made of many materials. One can use soft iron cores to make such magnets. Also one can use rare earth materials to make such magnets. Such magnets are very strong because of the strong magnetic properties of the rare earth metals. One such component which can be used to make magnets is NIB (NdFeB) or neodymium alloys.
The alloys are passed through different types of treatment to make them into ring magnets. Radially magnetization of ring magnets is particularly hard as these materials tend not to stay together and suddenly may gain multipoles.
The alloys are passed through a hot pressing facility where it is grinded to powder form and then melted and solidified to form the radial shape and to lose its magnetic polar properties.
Then the ring shaped alloy undergoes a specialized backward extrusion process where it is electrically charged and treated to form the radial magnetized ring magnet of super high strength.
This process results in radial magnetization as the magnetic pole are on the flat surfaces of the ring. These magnets are still very prone to chipping and rusting if the iron is exposed to air.
Hence they need to be coated to prevent corrosion. Also because of their high strength they need to be handled with extreme care as they may cause damage to the human body.
Where are radially magnetized ring magnets used?
These radially magnetized ring magnets of rare earth metals can come in various sizes, very small to large. Hence they find a wide range of applications in toys, servo motors and other small and powerful devices where high magnetic flux densities are required.
These magnets simplify rotor construction to a great extent.
Neodymium magnets
Meet the new attraction - the Neodymium magnets
Ever since it began to be in use, technology is getting a stronger grip on our lives. We cannot imagine our world today without technology in it. What's the secret? Well, it's not much of a secret. Every kid knows that technology is here to improve our lives, to make it easier on us, in this fast moving world.
Except for the obvious technological inventions and fields, we were recently introduced to an intriguing and promising field - the rare earth magnets field. Amongst the several types of these magnets we recognize a type named on a large scale - the Neodymium magnets. These very special magnets are the new game everyone wants to play with. Scientists are exploring this territory for only a few decades and already we can see the results in practice.
If once we thought electricity was the invention of the century or even the millennium, now we understand that planet Earth still holds great mysteries for us to discover. As mentioned, Neodymium magnets are one of those mysteries we're beginning to unlock. They have so many uses, that it would be wrong of us to ignore their existence.
With the kindest help from our beloved planet and the assistance of scientists and businessmen, there's no limit to the progress we can reach. As you know, human kind reached its place in top of the food chain by using his brain to get to higher places, to places "where no man has gone before".
What are Neodymium magnets good for?
In the short time we had to research and explore this newly exposed territory, we can confidently say that all technological, medical and electronic fields will have a great benefit from using any kind within the several kind of Neodymium magnets.
These magnets are super strong and condensed, and may be used in various forms and conditions - whatever will answer your requirements. As such, medical devices built using Neodymium magnets can function better and in a more accurate way (just like the MRI scanner works so much better than a simple CT scan).
Moreover, electronic devices may be released from their 'leash', and perform without being plugged to an electricity connection. Furthermore, the known ultra strength of the Neodymium magnets has opened up a whole new aspect to consider while inventing and developing devices that wouldn't normally involve magnets.
We haven't heard the last from Neodymium magnets yet
From looking at its usage up until now, we can guarantee that we'll be hearing a lot more from the subfield of Neodymium magnets. From the way things look now, it's going to do good to mankind, and just as important - to our planet Earth.
Ever since it began to be in use, technology is getting a stronger grip on our lives. We cannot imagine our world today without technology in it. What's the secret? Well, it's not much of a secret. Every kid knows that technology is here to improve our lives, to make it easier on us, in this fast moving world.
Except for the obvious technological inventions and fields, we were recently introduced to an intriguing and promising field - the rare earth magnets field. Amongst the several types of these magnets we recognize a type named on a large scale - the Neodymium magnets. These very special magnets are the new game everyone wants to play with. Scientists are exploring this territory for only a few decades and already we can see the results in practice.
If once we thought electricity was the invention of the century or even the millennium, now we understand that planet Earth still holds great mysteries for us to discover. As mentioned, Neodymium magnets are one of those mysteries we're beginning to unlock. They have so many uses, that it would be wrong of us to ignore their existence.
With the kindest help from our beloved planet and the assistance of scientists and businessmen, there's no limit to the progress we can reach. As you know, human kind reached its place in top of the food chain by using his brain to get to higher places, to places "where no man has gone before".
What are Neodymium magnets good for?
In the short time we had to research and explore this newly exposed territory, we can confidently say that all technological, medical and electronic fields will have a great benefit from using any kind within the several kind of Neodymium magnets.
These magnets are super strong and condensed, and may be used in various forms and conditions - whatever will answer your requirements. As such, medical devices built using Neodymium magnets can function better and in a more accurate way (just like the MRI scanner works so much better than a simple CT scan).
Moreover, electronic devices may be released from their 'leash', and perform without being plugged to an electricity connection. Furthermore, the known ultra strength of the Neodymium magnets has opened up a whole new aspect to consider while inventing and developing devices that wouldn't normally involve magnets.
We haven't heard the last from Neodymium magnets yet
From looking at its usage up until now, we can guarantee that we'll be hearing a lot more from the subfield of Neodymium magnets. From the way things look now, it's going to do good to mankind, and just as important - to our planet Earth.
Subscribe to:
Posts (Atom)