All materials capable of magnetization, are divided into hard magnetic and soft magnetic.The difference between them is that the magnetic materials rapidly lose their magnetic properties, while magnetically retain them long enough.
quite a few times to hold the iron cubes on a strong magnet to magnetize it himself.If several times to quickly open and close the iron scissors, they will begin to attract the needle or iron filings.This effect can be used if the needle fell into a narrow slit, and a permanent magnet to get it, you do not have.
permanent magnet made by magnetizing ordinary iron retains its properties for long.Suffice it to hit them against a hard surface or heat above 60 degrees, so that it once again demagnetized.
Various additives to iron, making it the steel, and can greatly change its magnetic properties.Steel capable of quenching is magnetic materials, and can be the basis for a strong magnet.Hardened steel makes files, web nozhovok etc.Stainless steel, used to make kitchen utensils and cutlery, does not give any hardening or magnetization.
At home, a permanent magnet can be made of hardened steel with the help of the inductor.The coil should be such as to preform for the magnet is completely fit inside it.If you are using the current from the mains in order to avoid short-circuit must be included in the scheme fuse.
addition of iron in the industrial manufacture of permanent magnets are used, and other materials such as Alnico - alloy of aluminum, nickel and cobalt.But most often used ferrite - Pressed mixture of iron oxide powder with various additives.Ferrite magnets in the step of creating can be given almost any shape, they are cheap to manufacture and easy to use.
magnetic force measuring device, called magnetometers.The strongest magnets made of sintered mixture of iron, boron and rare element neodymium.To separate the two small magnets of this material may be needed by weight to 150 kilograms.
Tip 2: How to build a magnet
Make a small magnet not so difficult.The most accessible and interesting for home use will magnet s made in the form of small picture frames.Frames can be of any shape and size and colored in any color.As a basis for magnet s can use family photos or any other material.
- paint and primer, brushes, putty knife, box, small magnets, glue, electric.
Prepare a small frame.Dismantle the frame and remove the glass.Now, remove the stand and support, leaving only the frame itself.Next, grasp the scope of the primer.Using a spatula, apply a small coat of primer on the surface of the frame.Please spread evenly one layer, and then another one.Wait until the primer dries.
Once you progruntuete all frames begin to color.Decide what colors will be used for your frames.
Apply the paint on the surface of the framework, it is best to apply paint 2-3 layers.So she would go to more evenly.And give time to dry each layer.Once you paint all the frames, leave them overnight to completely dry.
Then drill using a drill 2 holes in each frame (top and bottom) at fixing magnet s.Use the glue stick magnet s to the frame so as to fill the hole with glue, it is best to use a special hot melt.
Once the glue dries, you can insert into the framework of photos or chosen theme and close the substrate on the back side.
If you decide to make a permanent magnet at home, obey all safety precautions when working with electricity.Remember, high voltage is dangerous to life, but a short circuit could cause a fire.
- magnets with their hands