When and Where Is Magnet Discovered

The magnet is not invented by man, but a natural magnetic material. Ancient Greeks and Chinese found a natural magnetized stone in nature

It is called "magnet". This kind of stone can magically suck up small pieces of iron and always point in the same direction after swinging at random. Early navigators used the magnet as their first compass to tell direction at sea. The first to discover and use magnets should be Chinese, that is to say, making "compass" with magnets is one of China's four great inventions.

In the Warring States period, Chinese ancestors have accumulated a lot of knowledge in this respect of magnet phenomenon. When exploring iron ore, they often encountered magnetite, that is, magnetite (mainly composed of ferric oxide). These discoveries were recorded long ago. These discoveries were first recorded in Guanzi: "where there are magnets on the mountain, there is gold and copper under it."

After thousands of years of development, magnet has become a powerful material in our life. By synthesizing different alloys, the same effect can be achieved as that of magnet, and the magnetic force can also be improved. Man made magnets appeared in the 18th century, but the process of making stronger magnetic materials was slow until the production of Alnico in the 1920s. Subsequently, Ferrite magnetic material was invented and produced in the 1950s and rare earth magnets (including Neodymium and Samarium Cobalt) were produced in the 1970s. So far, the magnetic technology has been developed rapidly, and the strong magnetic materials also make the components more miniaturized.