What is the difference between a strong magnet and an ordinary magnet?

When it comes to magnets we are familiar with them back home, they attract iron, but magnets were not invented by man, they are natural magnetite. The ancient Greeks and Chinese found natural magnetised stones in nature that attracted small pieces of iron. Early navigators used magnets as a compass to identify the direction of the sea, and the magnet as a compass was one of the four great inventions of China. With the development of society, all kinds of magnets have been discovered, let's introduce the difference between powerful magnets and different magnets.

　　1. Powerful magnets, just by looking at the name, we know that his magnetic force must be bigger than ordinary magnets, but no matter powerful magnets and ordinary magnets, its magnetic poles will not change, we use technical means to make the same magnet with multiple poles, that is to say, there are several N poles of the magnet and the corresponding S poles.

　　2. Magnets are generally subject to external influences that weaken their magnetism, such as temperature changes and other magnetic fields, which also affect their magnetism, but different magnets are affected differently and demagnetised differently, but demagnetised magnets must be re-magnetised if they want to be magnetic again. Then there are powerful magnets, which are metal magnets. After magnetisation, the magnetic force is stronger and becomes a powerful magnet, the surface treatment of powerful magnets can be divided into galvanised, nickel-plated, epoxy, gold-plated and several other types, but no matter which type of plating, we first need to understand the characteristics of the magnets, powerful magnets belong to the powder metallurgy, its surface activity is relatively high, so pay attention to the phosphatisation, and the surface characteristics of the magnets should not be damaged.

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