Buy Online Strong Ring Magnet in China

China has been known for its efficient assembly line production of several products. But recently, Chinese researchers hit the headlines for building a magnet with the world’s strongest magnetic field. This development would help make huge advances in the field of medical scanning. The High Magnetic Field Laboratory at the Chinese Academy of Sciences was the place where this record-breaking magnet was created. The inner ring of this magnet was almost a meter in diameter and created a magnetic field of more than 10 Tesla.

The team that put together this China strong magnet now plans to create a hybrid magnet using this one, by putting a smaller but more powerful water-cooled magnet inside it. With the correct technical specifications for this combination, magnetic fields upwards of 45 Tesla could be targeted. There are some possible roadblocks in this plan, though. For instance, many metals lose their superconductivity at magnetic fields beyond 20 Tesla, and the metals could also crack and snap due to their inability to withstand the high stresses generated by magnetic fields of that intensity.

There are several reasons that researchers have been experimenting with the creation of strong magnetic fields. For instance, the miniaturization of cell phones has been made possible due to hitherto unknown properties of several materials becoming apparent when placed under huge magnetic fields. High magnetic fields are also being used by physicists to mold high-temperature superconductive materials which would help bullet trains to exceed the speed of sound. The major area of interest for high magnetic field materials is in medical science. The magnet created by Chinese researchers, for example, would be likely to help create more efficient MRI scanners, which would allow much better images to be produced in the scan, without harming the body whose scanned images are being produced.  

Ceramic Magnet Disc Available with Distinct Features and Shapes

Ceramic magnets were first created in the 1960s in Japan (the story goes that they were accidentally created). They are made of a mix of 90% iron oxide and 10% strontium oxide/barium oxide. The reason they have gained wide popularity is that of their low cost, high resistance to corrosion, and permanent nature of magnetization. The common uses of ceramic magnets are in DC motors, MRI (magnetic resonance imaging) machines, automotive sensors and magnetic separators. Because of the high thermal resistance, these magnets are suited for use in high-temperature environments.

The ingredients of ceramic magnets are added together in the correct proportion and superheated to temperatures in the range of 1800°F to 2000°F. Wet milling then minimizes the material to very small particulate matter, and after drying (or sometimes in the slurry form), it is put into a hydraulic press. Here the compaction takes place in the presence of a strong magnetic field when the water is mostly removed. The final stage is the grinding of the magnets as per customer specification.

Ceramic magnets are cast in different shapes – blocks, rings, and discs. A Ceramic magnet disc offers the following distinct features compares to other kinds of magnets:

• Compared to alnico and rare earth magnets, they are very cheap.
• The intrinsic coercive force is very high.
• The service temperature is much lesser than alnico magnets but much higher than rare earth magnets.
• They have lower energy than alnico and rare earth magnets.
• Tooling can be a little expensive because of the need for diamonds due to the brittle nature.
• Because of the corrosive nature, they are not advised to be used in load-bearing situations.

They will not rust because the raw material is already an oxidized form of iron. Hence they are highly resistant to corrosion.

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