What material can isolate magnetism?

No material can isolate the magnetic field. Magnetic field is a kind of invisible and intangible special substance. It is not composed of atoms or molecules, but exists objectively. The magnetic field has the radiation characteristics of wave particles. There is a magnetic field around the magnets, and the interaction between the magnets is mediated by the magnetic field, so the two magnets can work without contact.

The former Soviet Union and China had produced ferrite high-frequency magnetizers as early as 1950s. The disadvantages of sintered ceramic high-frequency magnetizer are hard and brittle, and it is extremely difficult to process, which affects its use and popularization. Since then, a mud magnetizer has been developed, but its permeability is low.

Ferrite high frequency magnetizers are produced by many magnetizer factories in China. In addition, the soft ferrite material produced by Radio Equipment Factory has a high Curie point temperature (500℃) and working frequency (300~700MHz).

Extended data:

The motion of charged particles such as electrons, ions and some polar molecules will change fundamentally in the magnetic field, especially in the strong magnetic field. Therefore, studying the influence of strong magnetic field on chemical reaction process, surface catalysis process, formation process of materials, especially magnetic materials, biological effect and liquid crystal formation process may lead to new discoveries and new interdisciplinary topics.

The application of strong magnetic field in materials science has opened up a new road for the development of new functional materials, which has attracted extensive attention abroad and has begun to be required at home. It is precisely because of the immeasurable application prospect of high-temperature superconductors in the future high-voltage field that they have attracted great attention from scientific and technological circles and even governments all over the world.

Therefore, no matter from the basic research or application point of view, the physical and chemical research under strong magnetic field has important scientific and technological significance. Through this research, it will not only help to deepen the contemporary basic research, but also play an important role in promoting the development of the national economy.

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