Neodymium Iron Boron Magnets 20160118

Analysis on the development trend of China NdFeB magnet in 2015-2020

The development direction of the neodymium iron boron magnet technology 
China introduced relevant policies to vigorously promote the development of the neodymium industry. It is expected that in the next few years the Ministry of science and technology will allocate funds with a total of RMB 3.5 hundred million to support the utilization of rare earth resources for wind power, electric vehicles, energy saving appliances, magnetic levitation train and other fields. The introduction of such national policies is undoubtedly the most powerful support of the future development of rare earth permanent magnet industry.

Analysis of neodymium iron boron magnet industry development trend
In recent years, given the further improvement of the comprehensive performance of the NdFeB permanent magnet, the NdFeB magnet has gradually replaced other magnetic materials and become the mainstream material of the market. Due to its high efficiency, energy saving, light weight, small size and other characteristics, the neodymium magnet has been widely used in wind power generation, new energy vehicles, energy saving appliances and other promising industries. With the increasing emphasis in energy saving and environmental protection, Neo magnet is facing numerous new development opportunities.

Prediction of neodymium iron boron magnet market competition pattern
With the rapid development of modern industry, the magnet has become an indispensable material of the modern industrial field. Strong magnet is a traditional sunrise industry in China, industry output value of which is now nearly RMB 3 billion, and is still increasing rapidly. As a branch of the strong magnet industry, the new functional neodymium permanent magnet material industry is in the high-end field of the industry, which has a promising market as a fast developing new entrant in recent years. Industrial strong magnet is the most mature product among new functional magnetic materials, which has become the preferred material for the underground interior landscape design, and expanded rapidly in the field of China magnetic levitation train, synchronizing the pace of the construction of maglev train. Given the demands from underground transportation facilities construction, such as urban tunnels, and underground pedestrian tunnels, etc, it is believed that the demands of industrial strong magnets will see a stable and quick growth in the future.

Magnet Manufacturer China Rare Earth Magnet Limited

Bonded Neodymium Iron Boron 

Bonded magnets appeared in 1970s, when the SmCo was already commercialized. Market condition of sintered permanent magnet is vigorous, but due to the difficulty of precision machining it into a special shape, and issues of cracking, corner and edge breakage, and problems in assembling, its application is limited. To solve the above problems, China manufacturers crashed the magnet, mixed it with plastic, and pressed it in magnetic field, which is probably the original manufacturing method of bonded magnet. Bonded NdFeB magnets have been widely applied for its various advantages, such as, low cost, high dimensional accuracy, high flexibility of shapes, good mechanical strength, light weight and so on, annual growth rate of which is up to 35% now. Since the appearance of NdFeB magnetic powder, the flexible bonded magnets have developed rapidly because of the high magnetic properties.

Advantages: high remanence, high coercivity and high energy product, high performance price ratio, high flexibility in size and minimum dimensions.

Sintered Neodymium Iron Boron

Based on the strength of magnetism and the coercivity, sintered neodymium permanent magnet material is decided into low coercive force N, middle coercivity M, high coercivity H, super high coercive force SH, ultra high coercivity UH, extra high coercive force EH, all together six types.
Production of sintered neodymium iron boron magnets is started with a powder metallurgy process. Smelted alloy will be made into powder and then pressed in magnetic field into blanks. Pressed blanks will be densified in inert gas or vacuum sintering. Last, in order to improve the coercivity of the magnet, aging heat treatment will usually be applied by China factories.

Sintered neodymium magnet material, with its excellent magnetic properties, are widely used in electronics, electrical machinery, medical equipment, toys, packaging, hardware machinery, aerospace and other fields. Most common products include permanent magnet motors, speakers, magnetic separators, computer magnetic disk drives, magnetic resonance imaging equipment, etc.

The industry expansion of industrial robot brings opportunities to neodymium magnet industry

NdFeB Permanent Magnet Manufacturer China Rare Earth Magnet Limited 

The fast rising of the labor costs has given rise to China's growing demand for industrial robots, which will also bring opportunities to the development of dynamic core neodymium magnet material of industrial robot.

According to historical data, China’s application ratio of robots in the industrial field is relatively low, leaving much room for growth in the future. Today, China's industrial robots use density is still lower than the global average, and substantially left behind by Japan, Korea, and Germany. South Korea’s use density of industrial robots is the world's highest one, with average of 395 units in per 10 thousand workers, while that in Japan and Germany were 339 units and 274 units, and only 23 units in China, less than half of the international average of 58 units. In 2012, the number of China's manufacturing workers were 42 million 620 thousand, if calculated according to the international average of 58 units, there shall be 247 thousand robots; if the avocation of 100 units per worker by the Ministry is implemented, China's industrial robots volume would reach 426 thousand units.

According to the 2014-2019 China neodymium iron boron permanent magnet material industry market analysis and investment forecast report released by CINIC, at present, the price of a 165kgs welding robot is about $168.6 thousand yuan (foreign) to 29.9 million yuan (domestic). The cost of the servo motor in it accounts for about 15%, i.e. 25.4 thousand yuan (foreign) to 42.8 thousand yuan (domestic). According to public information, the cost of neodymium magnets in the permanent magnet synchronous servo motor takes approximately 20%. Based on such percentage, NdFeB material cost is about 5095 yuan (foreign) to 8563 yuan (domestic). Currently, the raw material price of NdFeB N35SH is about 220 yuan / kg, which means the consumption of NdFeB is about 23 kgs (foreign) to 39 kgs (domestic). Taking into account the high gross profits of imported servo motor used in domestic robots, we believe that 25kgs of high-performance neodymium magnets will be consumed for one single 165kg welding robot. According to the International federation of robotics statistics, the current growth rate of global industrial robots is about 27%. Industrial robot sales have increased in all major global markets, among which China market grew by more than a half.

Meanwhile, with the rapid development of “internet + manufacture”, Industry 4.0 possibly will enter into Chinese manufacturing with Industry 3.0. The growing space of robot and automatic technology is vast. Policy support and industrial investment become important driving factors. Organizations expect that the demand of industrial robot is 63-170 sets from 2015 to 2020. Especially automobile areas, which cover 60% of the application of industrial robot, hopefully will development dramatically in the future. Development of China’s robot industry also brings better opportunity to application expansion of neodymium permanent magnet industry.

Single Side Neodymium Magnet

Magnets & Magnetic Assembly Manufacturer China Rare Earth Magnet Limited 

Single side magnet is a kind of neodymium magnetic assembly with strong magnetism on one side but much weaker on the other side. It is to use special processed galvanized cover wrap one side of the magnet, so the wrapped side will be magnetic shielding, the magnetic force is shifted to the other side, and then the magnetism of the other side will be increased.

Because all shielding technology cannot make its magnetism by refraction entirely, the so called "single-sided magnet” is the magnet with relatively stronger magnetism on single side.

Some applications just need the magnetism from one side; the magnetism of the other side may cause damage or interfere. While in some other applications, such as packaging need only one side of magnetism, the magnetism from the other side is not essential. So using a single side neodymium magnet assembly will greatly reduce the cost and save magnetic materials.

The magnetic reflection of the single side magnet similar to the refraction of satellite pot to signal or flashlight lamp to light, the refraction effect is mainly decided by the following three aspects:
1. Material: It has a close relationship with the choice of materials, the thickness, and the space between the permanent magnet and the materials. Pure iron leak magnetism easily, but the refraction will be increased after special treatment. However, 100% of shielding materials haven't been worked out presently.
2. The Angle: according to the principle of refraction, the effect of arc material is the best, while the refraction loss of right angle material is relatively bigger.
3. Space: the lines of magnetic force in the air like mobile phone signal, needs a space to reflect.
If the flashlight lamp is completely wrapped in the pot, the use effect is not good, because a large number of light refraction is wasted.

How to use the above principle and make the effect of magnetic strengthen to the best is an issue to choose the best between many parameters. In this way, the production cost will be greatly reduced in the industries of packaging and bags.

Single side permanent magnets are mostly applied in the application of these kinds of industries: printing and packaging, mobile phone box, wine box, tea box, gift boxes, bags, leather products, moon cake box, computer leather, clothing and white board button. The magnetic stability is very important. A lot of neodymium magnets with metal assembly made by poor quality material are without magnetism.

N38 or N40 Half Ring Permanent Magnet

Custom Big Neodymium Ring Magnets in Grade N38 or N40 

Looking for Half Ring Permanent Magnets :
I want to know whether you have the below magnets on stock:
Shape: Half Ring
Material & Grade: N38 or N40 Neodymium Magnet
Big Size: OD4.3" * ID3" * 0.7"
Magnetized through Thickness

Magnetization Direction: 
Could you please specify the quantity of your demand?
Our price will be based on quantity.

Looking for Ring Magnets:
Can you manufacture the whole ring as well with the same dimensions? Please mind the direction of magnetization: through thickness: North Pole on top and South Pole on bottom.

Neodymium Magnet Manufacturer China Rare Earth Magnet Limited: 

Yes, we can make a whole ring with same dimensions.
I will send you the prices of both grade N38 and N40.
And you can decide which grade you wish to order.
Please check the following prices:
Material: NdFeB Permanent Magnet
Shape: Ring
Size: OD4.3" * ID3" * 0.7"
Plating: NiCuNi
Magnetized through 0.7"
N38/Ex-works Shenzhen USD***/pc
N40/Ex-works Shenzhen USD***/pc
The above size is very large.
As technician team replied, the above prices are based on trial production.

Environmental Friendly Technologies of NdFeB Magnet 20151020

Magnet Manufacturer China Rare Earth Magnet Limited 

Nd-Fe-B permanent magnet (king of magnets) is widely used in different technical fields with broad application prospects, for comparing to other magnet material, neodymium magnet has higher remanence, magnetic coercivity and the best magnetic energy product.

While the neodymium-Iron-Boron magnet has a wide range of applications with its excellent magnetic properties and low cost, its poor corrosion resistance is a major drawback.

Under static immersion experiment at room temperature, corrosion speed of neodymium samples is measured 0.188g/m2.h in 3% sodium chloride solution, while the corrosion rate of carbon steel 0.119g/m2.h.

Meanwhile, electrochemical performance experiment result proves that neodymium permanent magnets are more susceptible to corrosion than carbon steel, but the electrochemical properties of both are similar to a certain degree.

Many of the scholars and researchers at home and abroad believe that Nd-Fe-B is a powder metallurgy products. Because of the difference between Nd phase, boron-rich phase, neodymium-Iron-Boron potentials, corrosion of Nd-Fe-b is mainly reflected as intergranular corrosion based on electrochemistry. Therefore, it is an eternal theme to ensure that the Neo magnets are not affected by corrosion and ensure that the magnetic properties of Nd-Fe-B magnet do not loss.

Corrosion of Nd-Fe-B permanent magnet is mainly dealt with by plating of nickel, zinc, phosphate, epoxy and others are the main solutions to problem of Corrosion problem. But blackening phenomenon of neodymium-Iron-Boron is seldom seen in reports. Hereby we will discuss black conversion film for NdFeB magnets based on the mechanism of iron and steel blackening.

Permanent Magnets 20150924

Neodymium Magnets VS Ferrite Magnets 

Do permanent magnets really harm our body? 
1. Harm of magnetic field: magnetic fields can promote human blood circulation, and there is no statistic indicating that the magnetic field is harmful to the human body, so we do not need to worry about harms of magnetic field.
2. Whether or not magnetic field harms human body depends on the strength of magnetic field. Generally strength of magnetic field less than 3000 Gauss (magnetic field units) does no harm to human body. Magnetic field strength over 3000 Gauss may harm human body. However such harm of magnetic field to human body is so little that it can be ignored. According to test, the harms magnetic field do on people is only one-fifth of TV.

"High temperature magnet" --- ferrite magnets VS neodymium iron boron magnets

Ferrite permanent magnets and neodymium magnets are different in the following ways:
1. NdFeB magnets are highly temperature-resistant, usually can stand 80 degrees, and demagnetization occurs when the operating temperature exceeds 80 degree.
2. Stability of ferrite magnets is excellent. It is oxide itself, and very stable, while Nd-Fe-B magnet is alloy, and prone to oxidation, so coating is necessary.
3. Performance of neodymium permanent magnets is better than that of ferrite.
4. Price of ferrite is much more favorable than that of NdFeB.

Application of pushing and pulling forces of magnets in rail transport 
There being two different types of magnetic force:
pulling and pushing force, there are two different corresponding application types of magnetic floating trains: a: railway based on repulsion force generated by superconducting electromagnets on trains and coil forces of rails; b railway based on pulling forces of permanent magnet, which means installing magnets at the bottom and tops of the train and equip the T-rail with reaction plate and induction steel plates on bottom and arm parts to control the electric current through magnets, and keep a distance of 10 mm between the magnet and guides (error of plus or minus 2 mm) and to maintain the gravity balance of rail steel and vehicles, so that the vehicles runs suspending on the tracks.