Strong magnets are also called neodymium iron boron magnets. It is an artificial permanent magnet. Because it is the permanent magnet with the strongest magnetic force up to now, so we called it powerful magnet. It commonly used in some specific places. General magnetic materials have a critical temperature, and some strong magnet manufacturers may demagnetize or demagnetize beyond this temperature. When the temperature of strong magnets and lodestone increased, the internal molecular heat movements became faster and faster. When the temperature rises to a certain value, the violent molecular thermal motion destroys the regularity of the direction of electron movement, and the magnetism of powerful magnet manufacturer magnets disappears.