#Neodymium Iron Boron Magnets

[mpcomagnetics]

Comprehensive Guide to Magnetic Performance Testing

Comprehensive Guide to Magnetic Performance Testing Do you know that the performance of your sintered NdFeB magnets can make or break your high tech applications? Learn the latest techniques to get top quality and reliability. Magnetic Performance Standards How do manufacturers guarantee every NdFeB magnet meets the performance standards? What are the new methods to measure magnetic properties…

[materialsscienceandengineering]

Scientists simulate magnetization reversal of Nd-Fe-B magnets using large-scale finite element models

NIMS has succeeded in simulating the magnetization reversal of Nd-Fe-B magnets using large-scale finite element models constructed based on tomographic data obtained by electron microscopy. Such simulations have shed light on microstructural features that hinder the coercivity, which quantifies a magnet's resistance to demagnetization in opposing magnetic fields. New tomography-based models are expected to guide toward the development of sustainable permanent magnets with ultimate performance. Green power generation, electric transportation, and other high-tech industries rely heavily on high-performance permanent magnets, among which the Nd-Fe-B magnets are the strongest and most in demand. The coercivity of industrial Nd-Fe-B magnets is far below its physical limit up to now. To resolve this issue, micromagnetic simulations on realistic models of the magnets can be employed.

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[hsmagnet]

NdFeB Magnetic Drive Wheel for Wall Climbing Robot

NdFeB Magnetic Drive Wheel for Wall Climbing Robot, Magnetic Wheels For Crawler Size: D160-d50xW80mm Force: 2940N Weight: 11.40kgs/each Application: Wall climbing robot Description Magnetic wall and ceiling climbing robots have been proposed in many industrial applications where robots must move over ferromagnetic material surfaces. The magnetic circuit design with magnetic attractive force…

[wayti-blog]

"Magnetic levitation is already employed in systems such as Maglev trains, flywheels and high-speed machinery. Now researchers at the Technical University of Denmark have given this old technology a fresh twist by explaining how a magnet can be levitated simply by rotating another magnet of a similar size near it. This unusual effect was first demonstrated by an electronics/computer and software engineer, Hamdi Ucar, in 2021, and the TU-Denmark team say it could be exploited in the contactless handling of objects or used to trap and manipulate ferromagnetic microparticles.

There are three main types of magnetic levitation. In the first, known as active magnetic stabilization, a control system supplies the magnetic force required keep the levitating object balanced. The second, termed electrodynamic suspension, is used in Maglev trains. Here, a moving magnet induces a current in a stationary conductor, producing a repulsive force that increases with the speed of the moving magnet. The last category, called spin-stabilized levitation, features a levitating magnet that spins at around 500 revolutions per minute (rpm) and remains stable thanks to the gyroscopic effect.

The new type of levitation involves two magnets. The first, dubbed the “rotor”, is mounted on a motor with its north and south poles oriented perpendicular to its rotation axis and made to rotate at velocities of around 10 000 rpm. In the TU-Denmark team’s experiments, this magnet was spherical, 19 mm in diameter and made from neodymium-iron-boron.

The second magnet – the “floater” – is placed near the rotor, begins to spin automatically, and then moves towards the rotor until it hovers in space a few centimetres below it. The floater precesses with the same frequency as the rotor and its magnetization is oriented close to the axis of rotation and towards the like pole of the rotor magnet. If disturbed, a restoring force moves it back to its equilibrium position.

“It is quite surprising that magnetic levitation develops in such as relatively simple system,” says Rasmus Bjørk, a physicist at TU-Denmark who led the study together with Frederik Laust Durhuus and Joachim Marco Hermansen."

"“It is intuitive to all that the magnetostatic force that one magnet exerts on another can be both attractive and repulsive,” explains Durhuus. “Without rotation, the free magnet will rotate so the force becomes purely attractive and then the magnets will collide into each other. What makes the new magnetic levitation system so special is that the rotation itself allows the floater to remain in a counterintuitive configuration, nearly perpendicular to the rotor’s field, where the magnetostatic force both attracts and repels it.”

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[allthebrazilianpolitics]

Brazil starts to tap its rare earth reserves

A rare earth mining project nearing completion in the midwestern state of Goiás has the potential to kickstart the development of a rare earth industry in Brazil, market participants said

The Mineração Serra Verde project, owned by energy transition-focused private equity firm Denham Capital, is in the final stages of commissioning and is scheduled to launch ionic clay rare earth production by the end of this year.

Planned phase 1 output is large by industry standards, at around 5,000 tonnes per year of rare earth oxides contained in concentrate. Importantly, this will include both the light rare earths neodymium and praseodymium and the heavy rare earths dysprosium and terbium, which are all needed for high-performance neodymium iron boron (NdFeB) magnets for the engines of electric vehicles (EVs).

Neodymium and praseodymium are used in the largest amount in NdFeB magnets, but trace quantities of dysprosium and terbium are critical for maintaining the performance of these magnets at high temperatures inside an EV engine.

Global production of heavy rare earth ores is concentrated in Myanmar, and supply is frequently disrupted. This is accelerating the search for new sources of supply to meet growing demand from the automotive sector.

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[gmdc-ltd]

Exploring the Uses of Rare Earth Elements

Rare earth elements find applications in technologies ranging from high-tech devices, clean energy, and hybrid vehicles to wind power turbines, hard disk drives, and defence systems. All elements in the lanthanide series share similar chemical, magnetic, and spectroscopic properties; their role in a wide range of applications is attributed to these shared characteristics. 

The Applications of Rare Earths

The primary sources of rare earth elements are bastnaesite and monazite. In India, monazite tops the list of mineral materials for the production of rare earths. It includes many lanthanides; approximately 50–70% of them are light rare earth elements (LREE).

Here are the various uses of rare earth elements:

Cerium (Ce) is one of the most abundant rare earth elements in the Earth’s crust. It is used to polish glass items such as lenses, liquid-crystal displays and plasma-display panels. It is also used as a fuel additive in fuel material like petrol and diesel. In combination with lanthanum, it has a use as an environmentally friendly substitute of cadmium in red pigments. Mischmetal, a mix of cerium and some other rare metals, is used to keep steel clean during its production phase.

Lanthanum (La) and neodymium (Nd) find application as glass additives in optical lenses and display screens. Along with yttrium (Y), they help store elements like magnesium, aluminum, and hydrogen. They act as catalysts to minimise sulphur dioxide emissions in automobiles. Nd also finds uses in welding in heavy industries and in medical equipment like MRI scanners.

Samarium (Sm), dysprosium (Dy), praseodymium (Pr), and terbium (Tb) are utilized in electronics, electric motors and audio equipment for their magnetic properties. Pr is used as neodymium’s replacement in magnets.

Scandium (Sc) is primarily used in aluminium alloys for sports equipment. This metal is mixed in small amounts in semiconductors and halogen bulbs.

Rare earth magnets, such as neodymium-iron-boron (NdFeB), are used in anti-lock brakes in cars to prevent the wheels from locking when you brake hard. These magnets also find applications in small gadgets such as digital cameras.

Nickel metal hydride (NiMH) batteries are considered special batteries. They have a mix of rare metals, including mischmetal, and are used in laptops, camcorders, and mobile phones to power them.

GMDC is committed to establish a comprehensive value chain for rare earths’ mining and their production. Our vision is to develop a sustainable supply chain of permanent magnets in India. For more information, visit our website https://www.gmdcltd.com/.

[kristinahertzz]

Automotive Magnetic Products Market

Automotive Magnetic Products Market Size, Share, Trends: Hitachi Metals, Ltd. Lead

Increasing Adoption of Rare-Earth Magnets in Automotive Applications Drives Market Growth

Market Overview:

The Automotive Magnetic Products Market is projected to grow at a CAGR of 6.8% from 2024 to 2031. The market value is expected to increase from USD XX billion in 2024 to USD YY billion by 2031. Asia-Pacific is anticipated to be the dominant region in this market. Key metrics include the increasing adoption of electric vehicles, rising demand for advanced driver assistance systems (ADAS), and growing focus on vehicle electrification. The market is experiencing robust growth driven by technological advancements in magnetic materials and the automotive industry's shift towards more efficient and sustainable solutions.

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Market Trends:

The automotive magnetic products market is undergoing a significant shift towards the use of rare-earth magnets, notably neodymium-iron-boron (NdFeB). These magnets offer excellent magnetic properties, such as high remanence and coercivity, making them ideal for a wide range of automotive applications, including electric motors, sensors, and actuators. The automobile sector is driving the trend by emphasizing vehicle performance, efficiency, and weight reduction. Rare-earth magnets enable the development of more compact and powerful electric motors, which contribute to the electrification of automobiles and the advancement of hybrid and electric vehicle technologies.

Market Segmentation:

Permanent magnets are projected to maintain their dominance in the automotive magnetic products market due to their vital role in many vehicle systems. These magnets offer high magnetic strength, stability, and efficiency, making them important in electric motors, sensors, and actuators. The growing use of electric and hybrid vehicles is boosting demand for permanent magnets, particularly neodymium-iron-boron (NdFeB). These magnets are necessary for the production of high-performance electric traction motors, which form the basis of EV powertrains.

Recent technological breakthroughs have underlined the increasing importance of permanent magnets in the automotive industry. For example, large manufacturers have made enormous investments to protect their rare-earth magnet supply chains. In 2023, a major European automaker formed a strategic relationship with a rare-earth mining company to ensure a consistent supply of magnetic materials for its growing EV manufacturing line.

Market Key Players:

Hitachi Metals, Ltd.

TDK Corporation

Magnequench International, LLC

Arnold Magnetic Technologies

Ningbo Yunsheng Co., Ltd.

Vacuumschmelze GmbH & Co. KG

Contact Us:

Name: Hari Krishna

Email us: hari.krishna@aurorawaveintellects.com

Website: https://aurorawaveintellects.com/

[mpcomagnetics]

Hand Tools with Magnetic Influence

Hand Tools with Magnetic Influence Magnets are an important part of hand tools because they make them easier to use and make them work better. They have changed the way many tools are made and how they are used. Here are a list with 6 different tools and how magnets have improved them. 1. Hammer with magnet: The magnetic hammer is great for building because it has a magnetic nail opener. It keeps…

[materialsscienceandengineering]

The Neodymium-Iron-Boron Ternary System

Phase Poll #10 wrapped up yesterday with the final result as 42.5% Fe, 30% Nd, and 27.5% B. This ternary system is most well known for neodymium-iron-boron magnets, so we’re going to spend a little bit of time discussing those before we narrow in on the chosen composition.

Nd-Fe-B magnets are permanent magnets with the composition of Nd2Fe14B, considered to be an intermetallic, and a tetragonal crystal structure. (Permanent magnets are those materials which are magnetized and create their own magnetic field, such as refrigerator magnets.) These neodymium magnets are the most widely used rare earth magnets and have numerous applications, including in computers, speakers, door locks, electric generators, among countless others. These magnets are typically produced either through powder metallurgy and sintering, or through melt spinning.

The chosen composition results in another stoichiometric, intermetallic phase, NdB4. Its space group is P4/bmb, meaning it crystalizes with a tetragonal crystal structure as well. On their own, there is little interest in neodymium boron compounds in the literature.

Sources/Further Reading: ( 1 ) ( 2 - image 2 ) ( 3 - image 3 ) ( 4 - images 4 and 5 )

More phase diagrams: ( image 1 ) ( 500K ) ( 1000K ) ( 1500K ) ( 2000K )

[hsmagnet]

How Does Air Gap Affect Magnet Selection?

How Does Air Gap Affect Magnet Selection? When selecting a magnet for a specific application, understanding the concept of air gap is crucial. An air gap refers to any non-magnetic material that separates a magnet from the ferromagnetic object it is intended to attract. This separation can significantly impact the performance of the magnet, primarily by affecting its holding force. 1. Definition…

[gmdc-ltd]

Exploring Neodymium, Optical Glass, and Electric Motors: Key Insights

Neodymium (Nd), a rare earth element, plays an important role in optical glasses and electric motors given its special magnetic and optical properties. Individually or interdependently, Nd, optical glass, and motors are pivotal in modern technologies, including electronics, renewable energy, telecommunications, healthcare, and scientific research.

Neodymium’s Role in Optical Glass

Nd is capable of absorbing certain wavelengths of light. Therefore, it is utilised in optical glasses to impart the color and boost the performance of optical devices. It can filter UV radiation, emit infrared light, and create lasers when used in glass. 

The addition of neodymium to the glass helps remove glare and make color corrections in lenses. This quality makes it very useful in lenses for high-tech cameras, microscopes, etc.

Neodymium glass is a preferred choice for protective eyewear because it filters out harmful UV radiation. It is also mixed with glass to create brighter light bulbs. 

Neodymium glass also finds use in laser applications like laser pointers or medical lasers. It is used in glasses for lasers that emit infrared light. These lasers are used in eye surgery, cosmetic surgery, skin cancer treatment, and laser pointers.

Incorporating neodymium oxide into glass creates Alexandrite glass. It appears purple or rose in natural light and blue or green in fluorescent light.

The Role of Nd in Electric Motors

Being the strongest magnets of all, Nd magnets are used as key components in electric motors for advantages they offer over other magnets. 

They have the capacity to store a large amount of magnetic energy. This helps produce a strong magnetic field in motors. They generate significant torque, which allows more of the electrical energy to be converted to mechanical energy.

Moreover, they can bear exposure to high temperatures and retain their magnetic strength, performing better than other magnets in harsh conditions.

Applications:

Neodymium-iron-boron (NdFeB) magnets are lightweight, which makes them suitable for electric vehicle (EV) batteries. These magnets allow for compact, efficient motors that can achieve greater speeds and longer ranges in EVs.

They are also useful in other parts of the EVs, including power steering, air conditioning, and battery management. They are used in vehicle charging infrastructure as well.

Other applications include wind turbines, industrial machinery, and equipment, and modern consumer electronics such as smartphones, computer hard drives, and windscreen wiper blades. 

Conclusion

In conclusion, with the rapidly evolving technologies, the increasing demand for electric vehicles and green technologies, and the need for advanced optical glass in precision instruments, the demand for neodymium will continue to grow.