Development Of Soft Magnetic Materials

By the beginning of the 20th century, silicon steel sheets were developed to replace low carbon steel, which improved the efficiency of transformers and reduced losses. Silicon steel sheet still ranks first among the soft magnetic materials used in the power industry. In the 1920s, the rise of radio technology promoted the development of high magnetic permeability materials, and the emergence of permalloy and permalloy magnetic powder cores. From the 1940s to the 1960s, it was a period of rapid development of science and technology. The invention of radar, television broadcasting, integrated circuits, etc., had higher requirements for soft magnetic materials. Soft magnetic alloy thin strips and soft ferrite materials were produced. . In the 1970s, with the development of telecommunications, automatic control, computers and other industries, soft magnetic alloys for magnetic heads were developed. In addition to the traditional crystalline soft magnetic alloys, another type of material, amorphous soft magnetic alloys, emerged. .