Magnetism - one of the most exciting phenomena in nature.Since ancient times, it is the interaction between two magnetic objects aroused the curiosity of philosophers, scientists, and researchers.Today, this phenomenon is used in many aspects of life.Neodymium magnet, which reviews such flattering amateur radio, was a revelation, an indispensable part of electrical engineering.But what is it?
Secrets
Neodymium Neodymium - is a powerful permanent magnetic material, which not so long ago became known to scientists.He also became incredibly affordable and suitable for different options for its use.Neodymium magnet, reviews of which is easily found on the Internet, called "rare earth".The chemical composition of it is this: fourteen atoms of iron (Fe14), one atom of boron (B) and two atoms of the element neodymium (Nd2).Unlike ceramic and ferrite, neodymium permanent magnets (often referred to as neo-magnets) are composed of the atoms of the lanthanides and actinides of the periodic table.That is why these magnets can be called the most powerful of the earth.Depending on the class and the form of their force (the magnetic energy is measured in gauss) can reach values of up to fifteen thousand Gauss, but typically ranges between two and three thousand Gauss.For comparison: the usual "home" fridge magnets give no more than fifty Gauss.
Applications
Neodymium magnet reviews about which you can read in the forums of fans Electrical quite expensive pleasure.That is why it is used not only in industries but also at home.Where used neodymium magnets?For example, the hard drive of a personal computer, make sure the home is in a segment of such a thing as neomagnit that directs the needle that reads the data.In addition, the magnets of this type are equipped with expensive speakers can be found in different fixtures furniture and fixtures.Neodymium magnets used to stop the counter.Often neodymium is used and souvenirs.
little flaws
minor flaw can be considered the fact that products such as neomagnit lost part of magnetic energy during operation at high temperatures.Unfortunately, that is why they can not be used in appliances used to generate heat energy, or associated with strong heat.At this point, however, developed a class of neo-magnets, which can be in operation at temperatures of up to two hundred degrees Celsius.
main advantages
What are the main advantages?The strength - the undoubted advantage of such elements as neodymium magnet, reviews which often emphasize on this factor.The small 25 mm diameter magnet can withstand almost ten kilograms of weight!Elements of large dimensions (for example, thirty to fifty millimeters) are dangerous and may even cause injury.If all measures of caution neodymium magnet - a unique thing for educational and entertainment purposes.The service life of such devices - one more unquestionable advantage.Although the production techniques, neodymium magnets are not more than thirty years, but now with the help of laboratory tests found that such elements are losing a hundred years only one percent of its energy.As a comparison, the ferrite magnets, which become a piece of ordinary iron in ten or fifteen years.
round shape against the folded
Someday someone from the readers wondered why the ferrite magnet shape generally resembles a horseshoe, and legs are painted in different colors: one red, the other - blue?The answer is simple - closing the magnetic field lines, the producers tried to increase the term of service of these elements.A coloring, respectively, should indicate polyusa- "plus" or "minus".Neodymium magnet, reviews of which emphasize its versatility, can be any shape, as it has a "multi-polarity" that is, an element can be divided into one surface to several poles.
Interesting phenomena of magnetism
illustrative interest for learning and entertainment is a film for visualization of magnetic field lines.If neatly neodymium magnets, they will contribute to the joint field the phenomenon of diamagnetic levitation.This means that several small objects can fly in the air without contact by the magnetic elements.If you try to drag a magnet for any non-magnetic surfaces (copper, aluminum), you can experience first hand the "magnetic disorder", that is, resistance to eddy currents, which occur during movement of the magnetic element of this kind of surface.Where to buy neodymium magnet for such experiments?Order now and you can buy it in specialized electronics stores.
What is the relationship between the magnet and the counter?
fact that gained widespread use neodymium magnets to stop the counters of water, gas, electricity.The reason for this phenomenon is clear: these elements are the most powerful and affordable.The main part of the meter (meters) based on the display changes in the rate of induction-magnetic transducer.Therefore, the idea of people use neodymium magnets to stop the counter by braking.Manufacturers same metering, knowing what users are using deceptive methods to adjust the readings began to produce non-magnetic device, which are protected from any possibility to make magnetic interference.As you can see, there is a tough fight consumers with producers.Statistics stubbornly shows that neodymium magnets to stop the counters are very hot commodity and it can even be used for such purposes.
How to stop the counter by a magnetic force?
to stop these devices using neodymium magnet.Meters installed in every residential building, is a hybrid-induced or simply induced.The mechanism of such a device is very simple - during the flow of electric current creates a magnetic field which causes the metal disk in motion, with the result that "recruited" kilowatts.Stop (or pause) accounting device by using an element such as a neodymium magnet.Stop the counter does not require any special knowledge.You just need to put a magnet in the vicinity of the instrument.The element will affect the wheels, which slow down or completely stop your progress.Distance to the meter must be selected taking into account the size of the neo-magnets.Such effects can be applied to any instrument based on the principle of using the transformer coils.Neodymium magnets to stop the counters have become incredibly popular in our time, as it allows to save on electricity decent amount.At the same time the cost of the purchase item pays just three or four months.
main characteristics of neo-magnets
Naturally, neodymium magnets can greatly differ according to different physical characteristics, as well as the size, shape, surface.For example, what do the numbers and letters in the class of magnet?There are certain classes that are identified by numerical and alphabetic symbols of the main characteristics.The main difference of neo-magnets - the working temperature at which they can be used.Exceeding this temperature will result in the loss of magnetic properties.
- Brand Normal (N) - use at temperatures up to eighty degrees;
- Brand Medium (M) - use at temperatures up to a hundred degrees;
- Brand High (H) - use at temperatures up to a hundred and twenty degrees;
- Brand Super High (SH) - use at temperatures up to a hundred and fifty degrees;
- grade Ultra High (UH) - use at temperatures up to one hundred and eighty degrees;
- Brand Extra High (EH) - use at temperatures up to two hundred degrees.
negative temperature influence on the neodymium magnets actually have.The figures also indicate measured in kilojoules per cubic meter of magnetic energy (in fact, is the power of the element, that is a force to be applied to a magnet to remove it from the surface).This parameter depends on the actual size, and weight.The more points of contact (square), the more difficult it is to tear off the surface of the magnet.However, the thickness influences the propagation of electromagnetic waves that affect the distance to the object of exposure (for example, the same counter).Another important characteristic is the coercive force.This is the value of the field in which you want to place a neodymium magnet to be completely "demagnetize".This value is important in cases of manual member in strong magnetic fields.
basic rules when working with magnets
Neodymium magnet reviews about which you can read on the websites of the companies manufacturers and distributors, is extremely powerful.Use it inadvertently - is very dangerous, it can even lead to injury.When working with neo-magnets is recommended to wear gloves, because large magnets in the collision can lead to fractures of fingers, bruises, skin tears, bruising.It is recommended to use as goggles to protect his eyes from the likely split of the magnet, which is accompanied by the formation of small fragments and sparks can injure eyes.It is important to keep the neodymium magnets at a distance from the disk drive memory (flash drives), phones, keys to intercoms, and generally any electronics.Magnetic fields generated by neo-magnets, may adversely affect the operation of these devices.
