In normal life, magnets are a very common thing. And thousands of years ago, working people in our country made one of the four inventions according to the characteristics of magnets. Even today, magnets are very useful. From all kinds of special electronic equipment to ordinary teaching aids and toys, you can often see the figure of the magnet. The picture below shows a horseshoe magnet. The block metal attracted to it is gadolinium (sound gá). This is an element that can be attracted to magnets like iron, cobalt, and nickel, and is currently widely used in the field of enhanced nuclear magnetic resonance imaging.
We know that the main component of the magnet is ferric oxide. An ordinary small magnet is made of black iron oxide. However, due to the nature of ferric oxide, his attraction to iron objects will not be too strong, and its magnetic properties will gradually weaken over time. In this case, how can we make a magnet that is more attractive and not suitable for decline? Under this premise, neodymium iron boron magnets came into being.
This kind of magnet with anti-corrosion treatment and shiny surface is neodymium iron boron magnet, and its chemical formula is Nd2Fe14B. The most commonly used NdFeB magnets are sintered at high temperatures from neodymium, iron, and boron. They are by far the most magnetic artificial magnets. If the core element of traditional ferric oxide is iron, then the reason why the neodymium iron boron magnet has such a strong magnetism is the role of the neodymium element.
