Wednesday, 18 Sep 2019

Quick introduction ...

 

Magnetic field and magnetism

Earth can be looked at as one giant magnet that has its own magnetic field which is strongest at its poles.

Magnetism is defined by magnets that can pull or push each other over a distance in a space. Magnetism has got its name from magnesia stone from an antique town Magnesia. Over 2000 years ago the ancient creeks found that pieces of magnesia stone pull close some metals. This stone was magnetite that is a kind of metal ore.

Para magnetism is magnetism which fades away when a magnet has been removed from an object. For example, chrome has slight magnetic characteristics when there is a magnet close to it, by removing magnet chrome loses its magnetism. There are just three metals – cobalt, iron and nickel that can transform into continuously persistent magnets in the case when a magnet has put close them. This property is called ferromagnetism.

Types of magnets

  • NdFeB magnet or neodymium magnet, also known as NIB or Neo magnet, consisting of neodymium (Nd), iron (Fe) and boron (B). This material has the greatest energy class of magnets and because of this it is the favorite of enthusiasts. Maximum working temperature is 200C. At the moment the highest energy class of neodymium magnets is marked N52, which has also the lowest working temperature, 60C. Neodymium magnet’s disadvantages include low working temperature and great non-flexibility. Usage areas: electric engines, computer hard drives, metal separators, wind generators, electric generators, loud-speakers, lifting mechanisms etc.
  • AlNiCo magent or aluminum magnet’s main elements are aluminum (Al), nickel (Ni) and cobalt (Co), marginally also iron and cuprum and in sometimes even titanium. Some of the isotropic AlNiCo magnets can magnetize in all directions. Other, anisotropic magnets like alnico5 and alnico8 magnetize in certain directions. AlNICo magnets possess high temperature resistance, 450C – 550C, and high resistance to corrosion. Some usage areas are metal separators, “cow magnets”, speakers, electric generators, sensors etc.
  • SmCo magnet or samarium-cobalt magnet main elements are samarium (Sm) and cobalt (Co). SmCo magnets have high energy class, only neodymium magnets are stronger. These magnets also have high resistance to temperature, 250C – 350C, good resistance to corrosion and very good magnetic persistence. Usage areas: computer hard drives, satellite systems, engines with high demands on magnetic stability etc.
  • Flexible magnets are isotropic and anisotropic. Anisotropic magnets have higher pulling power. Isotropic magnet’s temperature resistance is up to 180C. Usage areas: magnet paper for ink-printers, silkscreen printing magnets, advertising purposes, education, etc.

Magnets relieve health problems and tensions

Affecting and curing with magnets has been used over thousands years. People made out of magnets foot supports and various wearable artifacts, providing relief to their problems. The greater popularity of magnetic curing was spurred in eighteenth century by an Austria physician, Mesmer who dared to open health assisting salon where his magnetic curing was sided by hypnosis and psychoanalysis.

Living nature as a whole is situated inside of a surrounding magnetic field. Human body is like one magnetic field comprised of electric impulses trafficking in nerve system. Some medical scientists have found that affecting with magnets can improve body functions. Magnets also improve curing of wounds and bone injuries, blood circulation and generation, stimulate immune system, and give relief to blood pressure issues, headaches, stress and a lot more. Scientist, based on research, say that when laying a head into a strong magnetic field then the field will suppress activity of brain cells. Thus, when one wants to take time off for relaxing this could be one of the possibilities.

There are ways to use magnets: magnetic artifacts, basis of footwear, seating covers, bandages for feet, arms and neck. It has to be remembered that using of magnetic products for healing purposes is not recommended for pregnant or for those who have recently had a heart attack. One must not use them in the case of heart stimulator or other sensitive medical apparatus.

Magnet and water

When calcium and magnesium, found in everyday drinking water, are suitable for people, home equipment generally considers these to be malicious. Calcium based compound is responsible for shortened lifespan of water heating appliances: boilers, washing machines, and tea waters heating units go off readily. The accumulated compound makes energy amount needed for heating go much higher, too. Already 1 mm of that compound creates 10% additional energy consumption. One solution to get rid of that drain is a magnet that alters crystal structure of calcium based elements that go through a special apparatus. This way crystals will not accumulate on the inside walls of pipelines. The advantage of magnetic processing equipment is that they do not require additional energy. The shortcoming of it comes because some water may consist at higher rates of iron elements and then the system will not work. Such kind of equipment can be made on home basis, what is needed are magnets and fixation means to attach magnets to pipes.