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 The old iron magnets of old have now been replaced by much more powerful ones.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.
Showing posts with label Rare Earth magnets. Show all posts
Showing posts with label Rare Earth magnets. Show all posts
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.
People and magnets
In the days of Genesis, man did not need anything, but the absolute necessities, such as breathing, eating, drinking and sleeping. Once, all man had to do was to survive, to live day by day. However, as time went by, man grew smarter. He realized that there is more to life than surviving. He realized you should enjoy life while it lasts!
Thus, the great human mind made us open our eyes and look around us. Instead of just enjoying the view, we thought, "why not use it too?" at first, it was the little things. Wooden sticks became a skeleton to a house, stones and rocks became walls and mud became plaster.
Then, man started to see the land as a cover, as a layer one can dig in to find other things, other layers. It had to contain something good, since plants seem to grow and nourish from it. And so, years and years have passed and digging the ground hasn't stopped since. We are even digging at sea today. Well look and behold, that digging paid off. Many elements were discovered over the years, like silver, gold, oil etc. among those elements we have discovered rare earth magnets.
These are like an old pirate's hidden gold treasure. Despite their name, these magnets are not so rare (however please bear in mind that none of Earth's elements are infinite), and are useful in oh so many different ways, and in a huge variety of fields.
Usage of rare earth magnets
So, what can we do with this ancient pirate's treasure? They have been lying down deep inside the belly of our planet, waiting to be discovered, waiting to be used. It's only fair to Earth that we'll explore it and use these natural resources to help improve our lives here, as they were manufactured by it for a reason.
Thus, after years and years of exploring, researching, inventing, and developing, we can say that rare earth magnets are in use in almost every aspect of our lives.
You'd be amazed at the products and devices that contain these magnets. Starting at aircrafts, ships and space shuttles, missiles, and vehicles, through computers and radio, to home exercise devices (like magnetic treadmill or magnetic bikes). Today we can even use them to produce electricity!
Why use rare earth magnets?
The options to benefit from them are endless, and they are much cheaper (thus more available) than other magnets, which are also more difficult to work with. Actually, the more uses we can find for rare earth magnets instead of other natural resources, the more we will benefit.
Thus, the great human mind made us open our eyes and look around us. Instead of just enjoying the view, we thought, "why not use it too?" at first, it was the little things. Wooden sticks became a skeleton to a house, stones and rocks became walls and mud became plaster.
Then, man started to see the land as a cover, as a layer one can dig in to find other things, other layers. It had to contain something good, since plants seem to grow and nourish from it. And so, years and years have passed and digging the ground hasn't stopped since. We are even digging at sea today. Well look and behold, that digging paid off. Many elements were discovered over the years, like silver, gold, oil etc. among those elements we have discovered rare earth magnets.
These are like an old pirate's hidden gold treasure. Despite their name, these magnets are not so rare (however please bear in mind that none of Earth's elements are infinite), and are useful in oh so many different ways, and in a huge variety of fields.
Usage of rare earth magnets
So, what can we do with this ancient pirate's treasure? They have been lying down deep inside the belly of our planet, waiting to be discovered, waiting to be used. It's only fair to Earth that we'll explore it and use these natural resources to help improve our lives here, as they were manufactured by it for a reason.
Thus, after years and years of exploring, researching, inventing, and developing, we can say that rare earth magnets are in use in almost every aspect of our lives.
You'd be amazed at the products and devices that contain these magnets. Starting at aircrafts, ships and space shuttles, missiles, and vehicles, through computers and radio, to home exercise devices (like magnetic treadmill or magnetic bikes). Today we can even use them to produce electricity!
Why use rare earth magnets?
The options to benefit from them are endless, and they are much cheaper (thus more available) than other magnets, which are also more difficult to work with. Actually, the more uses we can find for rare earth magnets instead of other natural resources, the more we will benefit.
Rare Earth magnets
Some of the most powerful magnets in the world (if not THE most powerful) are made from a special alloy of chemical elements giving them their unique qualities, and called Rare Earth magnets.
These magnets are permanent, meaning the material itself of which they are made is magnetized and they don’t lose their magnetic properties over time.
This advantage of strength, however, comes with a price of brittleness and vulnerability to corrosion.
Types and uses of Rare Earth magnets
Rare earth magnets come in various forms and types and they have many uses. Some of this uses would surprise most people. For example, if you love fishing you might be interested to know that the breaks on your reel contain such magnets. Not many audiophiles know that such magnets are used in speakers and headphones.
Rare earth magnets are also used in hard drives (didn’t they always teach us not to put a hard drive near a magnet?), dynamos of bicycles, cordless tools and more.
Rare earth magnets – what you should look out for
Working with these magnets is no kids play. They are powerful enough to put people in danger of injury. Depending on the size of the magnet, body parts caught between two magnets can suffer injuries and bones might break.
The magnets themselves are so strong that if they hit each other they will most likely chip and minute particles flying in the air can injure anyone nearby.
If swallowed by accident they can disrupt the digestive system to the extent of causing death. Sadly, this is not science fiction and several such cases have been noted in children.
Rare earth magnets can also damage credit cards, hard drives, CRT screens and other appliances when they are placed too near.
These magnets are permanent, meaning the material itself of which they are made is magnetized and they don’t lose their magnetic properties over time.
This advantage of strength, however, comes with a price of brittleness and vulnerability to corrosion.
Types and uses of Rare Earth magnets
Rare earth magnets come in various forms and types and they have many uses. Some of this uses would surprise most people. For example, if you love fishing you might be interested to know that the breaks on your reel contain such magnets. Not many audiophiles know that such magnets are used in speakers and headphones.
Rare earth magnets are also used in hard drives (didn’t they always teach us not to put a hard drive near a magnet?), dynamos of bicycles, cordless tools and more.
Rare earth magnets – what you should look out for
Working with these magnets is no kids play. They are powerful enough to put people in danger of injury. Depending on the size of the magnet, body parts caught between two magnets can suffer injuries and bones might break.
The magnets themselves are so strong that if they hit each other they will most likely chip and minute particles flying in the air can injure anyone nearby.
If swallowed by accident they can disrupt the digestive system to the extent of causing death. Sadly, this is not science fiction and several such cases have been noted in children.
Rare earth magnets can also damage credit cards, hard drives, CRT screens and other appliances when they are placed too near.
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