Alnico Magnets Great Information About These Has Been Released

March 22, 2011 - PRLog -- Alnico magnets can be composed of many materials including copper, titanium, nickel, cobalt and aluminum. A hard and brittle material, Alnico is known for sometimes being difficult to rework. Alnico can be manufactured in many different shapes, the most popular being blocks, rings, discs, rods, horseshoes and cylinders .

With high residual inductions and high energies alnico magnets are normally manufactured through sintering or casting. Casting is a process where molten metal alloy is poured into a mold and processed through a number of various heat-treated cycles. When two main materials are combined and then melted to the point where they stick together is known as sintering, a common process used when manufacturing magnets.

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When sintering alnico, a fine alnico powder is usually compacted in a press. Alnico magnets are able to resist extremely high temperatures, can keep their magnetic qualities for a long time period, in addition to these benefits they are also strong and affordable. The many benefits of using alnico magnets makes them a great choice for industrial and consumer applications.

A chemical compound of iron oxide and ceramic is the basis of ceramic ferrite magnets. Ceramic ferrite magnets are made using a process of pressing and sintering ceramic and magnetic powders. Sintering is used when manufacturing magnets and it heats two main materials to a point when they stick together. Described as being hard and brittle, ceramic magnets are affordable to produce.Although the terms hard and soft are misleading ceramic ferrite magnets are categorized as either being a hard ferrite or a soft ferrite. The differences between hard and soft ferrite magnets is not in the density of the material, as the terms hard and soft suggest, instead the difference lies in the intensity of the magnetic field needed to demagnetize the magnets. Hard ferrite magnets need a stronger, more intensive magnetic field to demagnetize . The unique quality of a ceramic magnet is that it can be applied to flexible fabrics, which makes them great for crafts, decorations and use in home, school or work. There are a wide variety of uses for ceramic magnets.

One of the rare earth magnets is neodymium, which is made from neodymium which is a chemical element with atomic number 60 and symbol Nd. Present in the ore minerals monazite and bastnasite, neodymium is a silvery, soft metal that easily tarnishes. The strength and performance in extreme conditions is the reason why neodymium magnets are preferred for certain applications. It is the magnetic material of choice when maximum energy is required and can be used in maximum service temperatures of 125° to 150° C. Neodymium magnets are considerably stronger than ceramic ferrite or alnico magnets. The advantages to using neodymium magnets and other products made from neodymium are numerous.

Although neodymium is strong, affordable, popular and can withstand cold temperatures it also has some cons. Neodymium can lose its magnetism in environments where the temperature is too hot because it has a lower Curie temperature than other rare earth magnets like samarium-cobalt. Neodymium performs extremely well in very cold temperatures. The only other drawback to using neodymium lies in its durability. Since it is less resistant to oxidation than samarium-cobalt, it needs to have surface treatments applied to protect it from scratching. Neodymium is a brittle magnet, which can form cracks and is vulnerable to corrosion. Therefore, manufacturers will apply a surface treatment such as gold, nickel, zinc or tin plating or coating as a protective measure. Oxidization and cracking can be minimized by applying a good coating or plating to the neodymium magnet.

Magnetic strips that are flexible are used in many industries for a variety of purposes. Using magnetism to work, when you place a magnet next to a ferrous metal or another magnet, the magnet will pull or attract the object using the force of magnetism. A magnet will attach itself to an object that it is attracted to due to the force of magnetism. The uses for magnets are wide and which is why they are often used in fields such as industrial, marketing, commercial and retail. Of all the types of magnets, flexible magnetic strips are the most dexterous. Flexible magnetic strips have a number of advertising purposes and can be used for labels, signage, point of sales displays and vehicle signs. Planning boards, fridge magnets and printed magnets are made using flexible magnets. In particular fridge magnets are a great advertising tool because they keep your company information in a prominent spot in the home. Keep your products and services top of mind by using fridge magnets.

Due to their high levels of magnetism block magnets are quite durable. Consider the types of conditions and the purpose you will use a magnet for before you decide on the magnet's composition. A rare earth magnet like neodymium or samarium-cobalt is stronger than alnico and ceramic magnets, which means they will work well in industrial or heavy duty applications. In addition to magnet strength, also consider whether you need your block magnet to perform well in extremely high temperatures. If so, then you will want to take that into consideration when choosing the magnet type, as different magnets lose or maintain their magnetism at different temperatures. When you make your choice about which magnet to use keep the use and requirements of the magnet in mind.

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