Magnetic materials have been widely used in today's life. Where are magnetic materials used in daily life?

The application of soft magnetic materials in industry began at the end of 19. With the rise of electric power and telecommunication technology, low carbon steel is used to manufacture motors and transformers, and fine iron powder, iron oxide and fine iron wire are used for the magnetic core of telephone line inductance coil. At the beginning of the 20th century, silicon steel sheet was developed to replace low carbon steel, which improved the efficiency of transformer and reduced the loss. Up to now, silicon steel sheet still ranks first among soft magnetic materials used in power industry. In the 1920s, the rise of radio technology promoted the development of high permeability materials, and permalloy and permalloy magnetic powder cores appeared. From 1940s to 1960s, science and technology developed rapidly. The invention of radar, television broadcasting and integrated circuits put forward higher requirements for soft magnetic materials, resulting in soft magnetic alloy ribbons and soft magnetic ferrite materials. In 1970s, with the development of telecommunication, automatic control, computer and other industries, soft magnetic alloys for magnetic heads were developed. In addition to the traditional crystalline soft magnetic alloy, another material-amorphous soft magnetic alloy came into being.

Types of commonly used soft magnetic cores Iron, cobalt and nickel are the basic components of magnetic materials. magnetic material

Classification by product shape (main components, magnetic properties and structural characteristics): (1) Powder core: magnetic powder core, including: iron powder core, iron silicon aluminum powder core, Qualcomm powder core (MPP) and ferrite core (2) Winding core: silicon steel sheet, permalloy, amorphous and nano.