Speaker Magnet And Its Effect on Sound Quality
Speaker Magnet And Its Effect on Sound Quality Types of magnets: 1. Alloy magnet Aluminum nickel-cobalt magnet, also known as speaker magnet. It was generally made of an internal magnetic horn. It has small power, and a narrow frequency range, it is hard and brittle. 2. Iron oxide magnet It is sintered from magnetic material powder and iron powder at about 1200 degrees centigrade. It was generally made of an external magnetic horn, it is low in price, and high in quality. Its disadvantages are large volume, small power, and a narrow frequency range. 3. NdFeB magnet Its performance is much better than that of iron oxide magnets. The magnetic strength of the same volume is 10 times higher than that of general iron oxide. Its characteristics: the same magnetic flux under its small size, [...]
The Strongest Permanent Magnet – Neodymium Magnets
The Strongest Permanent Magnet - Neodymium Magnets At room temperature, the neodymium magnet is the most powerful permanent magnet. But this is only at room temperature. Early Neo magnets had an annoying flaw: they were sensitive to temperature, and when the temperature rose, the magnetism dropped dramatically, and when it was above 100 degrees Celsius, it was completely demagnetized. But now an improvement has been found by adding a small amount of dysprosium, another rare earth metal, which is less sensitive to temperature changes. At the same time, a technological revolution driven by permanent magnets opened the curtain. Anywhere you want to produce the strongest magnetic field with the least amount of material, Neo permanent magnets are preferred: car engines, spindle motors on CD and DVD readers, electric signals converted into sound diaphragms in headphones, [...]
Magnet Design Guide – Learn How to Make Your Magnets
Magnet Design Guide – Learn How to Make Your Magnets Designing your magnets can be an overwhelming task without the right information. It does not matter the type of magnet design you want – it is critical to consider possible shapes, materials, magnetic performance characteristics, and uses among others. Once you understand these 4 principles for magnets design, the process will be seamless and straightforward. Step 1: Know the Magnet Design or Shape First, you must know the magnet design shape you want. In most cases, the applications will determine the magnet shape. Of course, there are those we consider “standard” while others are custom designs. Whenever you have magnet design ideas, consider the following: Although these are some of the most common magnet design shapes, you can also choose custom options for your project [...]
What are the Types of Magnets?
What are the Types of Magnets? There are many kinds of magnets, generally divided into permanent magnets and soft magnets. Permanent magnet is divided into two categories: The first category is: metal alloy magnets include NdFeB, SmCo and AlNiCo magnets. The second category is ferrite permanent magnet. What are the Types of Magnets 1. Neodymium-iron-boron magnet: It is the most commercially available magnet, known as the magnet king, with extremely high magnetic properties, its maximum magnetic energy product is more than 10 times higher than that of ferrite. Its mechanical properties are quite good. The working temperature can reach up to 200 degrees Celsius. Moreover, its texture is hard, its performance is stable, and its cost performance is very good, so its application is extremely extensive. But because of its strong chemical activity, [...]
What is Ferromagnetism
What is Ferromagnetism If the atoms have magnetic moments in the material, they can be called magnetic materials. Iron, cobalt, nickel, and manganese have magnetic moments with their alloy atoms, which are common magnetic materials. Gold, silver, copper, aluminum, and other atoms have no magnetic moment and are non-magnetic materials. magnets But magnetism includes ferromagnetism, antiferromagnetism, spin glass, and so on. In ferromagnetic materials (each arrow in the picture represents the magnetic moment of an atom). The adjacent magnetic moments are arranged parallel to each other, showing ferromagnetism as a whole. In antiferromagnetic materials, because the adjacent magnetic moments are antiparallel, the magnetic moments cancel each other, and the whole does not show magnetism. There are several kinds of magnetic materials. What is Ferromagnetism 2. The arrangement of magnetic moments in ferromagnetic materials. [...]
Anti-corrosion of NdFeB Magnet
Anti-corrosion of NdFeB Magnet NdFeB magnet is very easy to be corroded.Therefore, most of the finished product to plating or coating.Routine used in surface treatment including: nickel (nickel-copper-nickel, zinc, aluminum, such as electrophoresis.If the work in a confined environment, can also be used phosphate way.strong magnetic hooks Neodymium-iron-boron magnet are used widely at present, the rapid development of magnet products.Neodymium-iron-boron from the wide application of the invention to now, only 20 years of time.Because of its high magnetic properties and ease of processing, the price is not high, so the rapid expansion of the application field.At present, neodymium-iron-boron of commercialization, magnetic energy product can reach the 50MGOe, the ferrite is 10 times. Anti-corrosion of NdFeB Magnet Nd-Fe-B magnet is also a powder metallurgy products, processing methods and samarium cobalt similar.At present, neodymium-iron-boron maximum [...]
Custom Magnets
Custom Magnets As one of CHINA’s top professional flexible permanent magnet suppliers, NEOi's mission is to satisfy all your special custom magnet needs. We offer a vast selection of flexible magnets with a broad range of thicknesses, widths, and lengths to meet diverse custom demands. Specialized options available include choices of laminates, polarity configurations, cut-sheets, kiss-cutting, etc. Further details can be found in the following pages. We offer a full range of customized magnets in roll lengths up to 600 meters, (1968ft) depending on width and thickness. Roll width can vary from fine slitted narrow rolls to up to 1003mm. (39.5inches) Roll thicknesses can be made from 0.2mm (.008") up to 2mm (.080") depending on magnetic sheeting width. In addition to our standard laminates, we can custom apply your laminates to flexible magnetic sheeting, or [...]
Hard Ferrite Magnet
Hard Ferrite Magnet The hard ferrite is manufactured with SrO or BaO and Fe2O3 by ceramic process. Because of its cheaper price, and production process is relatively simple, compared with the prices of their products relatively cheap in terms of other magnets. The main raw materials of ferrite magnets is oxide, so, it could not be eroded due to the impact of chemical substances or the environment (except for acid). Therefore, the surface does not need electroplating treatment. It is mainly used in handicrafts, drawing annex, toys, motor, loud speakers. Sintered Ferrite Magnets Hard ferrite magnets are manufactured by a die pressing followed by sintering process which allows economic production of components in a varied array of sizes and shapes. Ferrite magnets have excellent corrosion resistance and have normal operating capabilities between -40 oC and [...]
Application of Magnetic Materials in Industry
Application of Magnetic Materials in Industry In fact, magnetic materials can be seen everywhere in our life, such as Fe3O4, that is, rust. It is a natural magnet can be seen everywhere in our life. In our industrial production, magnetic materials are extensively and ubiquitously applied. For instance, a generator for power generation, a transformer for power transmission, a motor for cars, and a telephone we use to make phone calls at ordinary times are all common things in our daily life, which cannot be produced without magnetic materials. It can be proved that our industrial manufacture cannot be separated from magnetic materials. Because many devices and equipment need coil structures, without magnetic materials we cannot electrify modern life, and our life will lack fun in a large amount. This shows the importance of magnetic [...]
Soft Magnetic Alloys
Soft Magnetic Alloys Soft magnetic material includes a wide variety of nickel-iron and nickel-cobalt soft magnetic alloys and pure iron for high performance components requiring high initial and maximum permeability coupled with ease of fabrication. Sophisticated equipment, advanced technology and the expertise developed for producing aeronautical grade alloys are employed for manufacturing, high performance soft magnetic material. Soft Magnetic Alloys Starting with ultra clean raw materials, special processes and techniques are used for melting and refining this material under controlled atmospheric conditions in the Air Induction Melting, Vacuum Induction Refining and Vacuum Induction Melting furnaces. The final product is manufactured through a combination of forging, hot and cold rolling, wire drawing and heat treatment depending on the customer`s specifications. Soft magnetic alloys includes two alloy systems: Softmag Alloys Sofcomag Alloys 1. Softmag Alloys [...]
Things to Do With Rare Earth Magnets
Things to Do With Rare Earth Magnets Neodymium iron boron (NIB) magnets are usually called neodymium or rare-earth magnets. They are extremely strong, having a magnetic pull-force that is 10 times greater than ferrite magnets and 20,000 times greater than the Earth's magnetic field. These magnets are brittle as well as powerful and they can shatter easily. If proper care is taken when handling them, they can be put to many instructive and creative uses. Things to Do With Rare Earth Magnets Invisible Tool Holder Put a 1/2-inch diameter cylindrical neodymium magnet in your pocket and it will act as a tool holder. Any tool with a metal handle or shaft will be held on your trousers by the magnet. If you don't want to risk ripping your trousers, make a magnetic tool [...]
How to Demagnetize a Magnet
How to Demagnetize a Magnet Permanent magnets require special manufacturing techniques in a magnetic field to get the metal to stay in the proper alignment. In order to demagnetize a magnet, you need to change this alignment. This process usually requires a high amount of heat, or a strong magnetic field at a reverse polarity to the magnet you want to demagnetize. Change the Magnet with High Heat Heating a magnet causes the electrons inside to spin and generally move to higher energy states, which makes them end up in a position that’s opposed to other electrons nearby. Because of this the electrons are no longer as well lined up, so the magnetism of the whole object decreases. Eventually whole regions of the magnet fail to be lined up properly and the magnet is demagnetized. [...]
