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Definition of permanent magnet material

Common permanent magnet materials are AlNiCo, ferrite permanent magnet materials and rare earth permanent magnet materials. Alnico-cobalt alloys have been developed from Al-Ni-Fe alloys. At present, the types of Al-N-cobalt alloys that can be manufactured in China are mainly LNG34, LNG52, LNGJ32, LNGJ56 and so on. Since the main characteristic of AlNiCo is high Br (residual magnetic induction) and low coercive permanent magnet materials, the relative magnetic permeability is above 3, so in the specific application, the magnetic pole must be a growth cylinder or a long rod. to minimize the effect of effect.

The AlNiCo magnet has a low coercive force. Therefore, any iron device should be strictly prohibited from contacting the AlNiCo permanent magnet material during use to avoid local demagnetization of the permanent magnet and distortion of the magnetic flux distribution in the magnetic circuit. The advantage of the AlNiCo magnet is that the temperature coefficient is small, and the deterioration of the permanent magnet characteristics due to temperature changes is small, but the material is hard and brittle, and processing is difficult. The main applications of AlNiCo are in electronic ignition systems, watt-hour meters, voltammeters, medical instruments, industrial motors, magnetic reed switches, generators, hand tools, vending machines, etc.

Ferrite permanent magnet material is one of the most widely used permanent magnet materials, and its main component is MoFe2O3. It has the advantages of large coercive force, light weight, abundant raw material source, low price, oxidation resistance, corrosion resistance, large anisotropy constant of magnetic crystal, and approximate demagnetization curve as straight line. The disadvantage is that the residual magnetism is low, the temperature coefficient is large, and it is brittle. The coercive force of the ferrite permanent magnet material is between the AlNiCo material and the rare earth cobalt permanent magnet material. Because of its low remanence, it is generally suitable for design into a flat shape. Due to its low cost, ferrite magnetic materials have a wide range of applications, from motors and speakers to toys and handicrafts, making them the most widely used permanent magnet materials. The rare earth permanent magnet material has the advantages of high coercive force, large maximum magnetic energy product, and reversible magnetic permeability equal to one. Therefore, its magnetic properties far exceed that of other magnetic materials such as ferrite and aluminum nickel cobalt.


What kind of particles are transmitted by the magnetic force between the two magnets?

Let us first understand what the magnetic force between the two magnets belongs to, so that we can understand how this force is transmitted!

First, gravity

Gravity is the long-range force, which is the smallest of the basic forces, but in celestial interactions, gravity is the most common force! Gravity is thought to be used to transmit gravity, but it is still being guessed so far, or we can think of it as wrong for the time being. After all, it is not recognized. In quantum mechanics, the definition of gravity is: a spin 2, boson with zero mass!

Second, the electromagnetic force

Why is magnetism and electricity unified as electromagnetic force, because the two are unified and mutually convertible. Like gravity, electromagnetic force is also a long-range force, and this is the biggest help for our daily work and life. Almost all electric equipment is This force is working! The medium particle that realizes its force is photon, because this is inseparable from electromagnetic waves, and the whole electromagnetic band is actually the different wavelength bands of light. Some can be seen, some can not be seen, and the magnetic force is that we cannot see. That kind of!

Third, weak interaction force

The weak interaction is transmitted by fermions or bosons, which is the second weakest of the four forces and the shortest distance. It only acts on fermions such as electrons, quark layers, neutrinos, etc., and restricts radioactivity!

Fourth, strong interaction force

The nuclear force between protons and neutrons is a strong interaction force, strong interaction force is the strongest of the four basic forces, but its range of action is very short! It is the gluon that transmits a strong force!


Apple’s 2018 iPad Pro Contains 102 Magnets

Just when we thought Apple had done it all, they introduced a new version of their tablet that caught our attention—the 2018 version of the iPad Pro, which contains 102 Small magnets. That’s right, 102 MAGNETS. These magnets are used to hold the Apple Pencil stylus to the side of the tablet and to attach the Smart Keyboard Folio. You can’t tell the magnets are there, however. While they’re distributed mainly along the edges of the tablet, you can only see them by using a magnetic field viewing film!U-poleamg a wide variety of magnets can be provided.


New surface treatment for POT magnets Electrophoresis Coating

For neodymium magnets, plating is an very important process to protect the magnet against its working environment

For POT magnets, if no special request, we use neodymium magnets with a Ni-Cu-Ni coating for our pot magnets. In addition to traditional plating like neodymium magnets, we also can supply colorful paint finish like common white paint:

However, we always hope our life is full of colors and different

So we tried to use Electrophoresis Coating for POT magnets for adding different bright colors and  get good feedback from our customers.

However, if your magnet requires a particular characteristic or operates in a particularly high temperature or corrosive environment, Electrophoresis Coating is not the best choice, please contact our sales engineer for more information



Multi-wire cutting equipments for efficient magnets machining

Multi-wire saw has been used for the machining of hard brittle material, such as silicone, semiconductor and sapphire, and gradually took the place of traditional inner slicing machine. Multi-wire saw is also introduced to the machining process of rare earth permanent magnet by Chinese manufacturers, and achieved good results.

For rapidly and efficiently machining rare earth magnets, U-Polemag has made a huge investment in new plant for multi-wire saw equipments for allowing integration of a wire cutting process into a high volume production scale operation.

Working Principle of Multi-wire Saw

Multi-wire saw depend mainly on reciprocating motion of thin steel wire, then enable grinding and cutting for material. Due to the environmental item, Silicon Carbide mortar has virtually been abandoned by users, and resin bonded diamond line has become mainstream.

Advantages of Multi-wire Saw

  1. Avoiding magnet materials waste and improving the yield product
  2. Rapidly and efficiently machining magnets
  3. Superior cutting precision with good consistency.
  4. Surfaceroughness is low, and free of follow-up grinding process and its machining allowances.
  5. Sludgescraps easy to recycle.

Over half offshore wind power investment directed projects will be in UK and China by 2025

 Energy research and consultancy firm Westwood Global Energy Group predicts that global offshore wind energy capacity will increase fivefold between 2017 and 2025, with almost half of a projected 289 billion euros ($315.7 billion) of global investment directed toward projects in the UK and China. Presenting at the All Energy conference in Glasgow, Westwood’s President of Consulting Andrew Reid said that China is a major growth market in the offshore wind industry. China plans to install 12.7 GW in turbine projects over the next eight years, up from 1GW in 2016, and totaling 53.6 billion euro in investment. “China is still in the early development phases of an offshore wind industry,” Reid said. “China as a territory has significant resource potential, allied with an appetite to progress and have more material impact with their offshore wind market.”
   The UK still dominates the sector and is forecast to add 17.7 GW of capacity by 2025 with investment of 81 billion euro. Westwood forecasts a total of 62 gigawatts of global capacity will be added by 2025, an increase of 466 percent, based on planned projects and those already under construction. “The UK has a lot of marine territory, with numerous high quality sites where you can make meaningful contributions,” Reid said. “We’ve underinvested in our energy infrastructure for decades and we’ve got a lot of catching up to do. There’s a huge political drive and support for the [offshore wind] sector.” Over the last three decades, offshore wind energy has become increasingly cost competitive, leading to the current boom in the industry. The larger scale of turbines has driven efficiency. Rotor diameter in 1985 was around 15 meters, generating 0.05 megawatts of power. Current turbines have rotor diameters of up to 164 meters that can generate up to 8 megawatts.
    The next generation of 12 to 15 megawatt turbines will stand as tall as the Eiffel Tower, with rotor diameters of over 200 meters. Westwood predicts offshore wind could become more competitive than Combined Cycle Gas Turbines plants by 2020. The industry was heavily subsidized by governments in order to attract investment but subsidies have been reduced.
    In Germany, Europe’s second largest offshore wind market, a recent licensing round saw utilities bidding on prospective sites on the basis that they do not need subsidies. “The offshore wind industry is a very real industry today, one which stands on its own two feet” Reid said. “And I spend most of my time in the oil and gas sector. I’m quite surprised how well this industry has done and what it’s shaping up to be.” Earlier this year, the British Chamber of Commerce Shanghai announced plans for an offshore wind hub that will facilitate the entry of specialist UK companies into the Chinese market, with support from British trade association RenewableUK and the UK Department for International Trade.
    Maf Smith, deputy chief executive of RenewableUK, said: “China has a very ambitious offshore wind program as part of its overall need to decarbonize and shift to cleaner fuels.”

Chinese Rare Earths Exports Dip to 3-year Low

China is the largest global producer of rare earths, which are highly in demand for their use in super magnets and technological devices. The now coveted industrial metal was added to the list of critical metals by the Trump administration, while international demand for the metals has steadily grown.

rare earths

Chinese exports of rare earths dropped by some 37 percent month-over-month in October. In September, the Asian nation shipped 4,950 tonnes of rare earths, but that number declined to 3,100 tonnes in October.

An ongoing trade and tariff war between China and the US may be one of the motivating factors behind the reduction in output. Just last month, China announced it would decrease production by 36 percent for the rest of 2018, strategically only supplying its own domestic demand.

The country has been systematically reducing its production of rare earths since 2016, according to Adamas Intelligence. The uncertainty brought on by depleting output has forced rare earth end users to seek alternatives to Chinese supply.