What are the applications of zinc oxide in magnetic materials?

2017-02-04

We all know that zinc oxide has a wide range of applications. Today, we will focus on some of its applications in magnetic materials. With the rapid development of computers, mobile communications, fiber optic communications, EMC, DVDs, digital television, and new lighting fixtures, a larger market has been opened up for soft magnetic ferrites, with soft magnetic ferrite products developing rapidly in this market. The development of soft magnetic ferrite products has further expanded the market for upstream iron oxide, manganese oxide, and zinc oxide materials. Ferrites are magnetic composite oxides mainly composed of iron oxide and iron or rare earth oxides.

We all know that zinc oxide has a wide range of applications. Today, we will focus on some of its applications in magnetic materials.

The rapid development of computers, mobile communications, fiber optic communications, EMC, DVDs, digital television, and new lighting fixtures has opened up a larger market for soft magnetic ferrites, with soft ferrite products experiencing the fastest growth in this market.

　 The development of soft magnetic ferrite products has further expanded the market for upstream iron oxide, manganese oxide, and zinc oxide materials.

　 Ferrites are magnetic composite oxides mainly composed of iron oxide and iron group or rare earth group oxides. The resistivity of ferrites is much higher than that of metallic and alloy magnetic materials, so ferrites are sometimes called "magnetic semiconductors".

　 Soft magnetic materials are easily magnetized and easily lose their magnetism. The area enclosed by the hysteresis loop is very small, the coercive force is very low, and the magnetization curve rises steeply before saturation, that is, the permeability is very large. To put it simply, soft magnetism is relative to hard magnetism. After magnetization, the magnetism of hard magnetic cores is not easily lost, such as being able to attract iron, while soft magnetic cores need to wind coils on them to generate magnetic lines of force, that is, the inductance is strengthened, and can be made into inductor or transformer components. A simple soft magnetic core cannot attract iron. The main materials of soft magnetic ferrites are: iron oxide, manganese oxide, zinc oxide, magnesium oxide, etc., such as manganese-zinc ferrite, nickel-zinc ferrite, and magnesium-zinc ferrite. Soft magnetic ferrites are currently a type of ferrite material with a wide range of uses, many varieties, large quantities, and high output value. It is mainly used as a key material for various inductor components, such as filter cores and transformer cores.

　 The larger the production of soft magnetic ferrite materials, the greater the amount of zinc oxide required. China is already a major producer of magnetic materials in the world, and the magnetic materials industry in developed Western countries is also shifting to China. In recent years, some well-known magnetic material manufacturing companies abroad have also been optimistic about China, such as TDK, FDK, and NICERAMIC from Japan, PHILIPS from Europe, VAC from Germany, as well as companies from the United States and South Korea, are all advancing into China. Foreign companies and local magnetic material production companies have merged into a powerful force, with more than 400 companies in soft magnetic ferrite production. The development of soft magnetic ferrites has provided a larger market for the use of zinc oxide and has also promoted technological progress in the production of high-quality zinc oxide.

　 The zinc oxide used in soft magnetic ferrite materials is currently mainly high-purity zinc oxide produced by the indirect method. The total annual production capacity of finished zinc oxide in China has exceeded 1 million tons, with an annual production capacity of 300,000 tons of 99.7% indirect zinc oxide, an annual production capacity of more than 600,000 tons of 85-99.5% direct zinc oxide, and an annual production capacity of more than 100,000 tons of 90-99% wet zinc oxide. There are only a handful of companies producing nano zinc oxide products.

These are some of the applications of zinc oxide in magnetic materials. Hope this helps!

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