The Application of liquid nitrogen dewars
Editor:adminClick：
Time:2018-05-11 11:01
The Application of liquid nitrogen dewars
The liquid nitrogen tank is manufactured according to the vacuum jacket adiabatic principle invented by British scientist Dewar in 1898. It scientifically solves the problem of large loss of liquid nitrogen due to thermal convection, conduction, and radiation during storage of liquid nitrogen. With the development of science and technology and the progress of human society, high-vacuum multi-layer insulation technology and its new materials and new processes have been adopted, so that liquid nitrogen tanks have excellent thermal insulation properties and can be stored in liquid nitrogen (-196°C ) The natural evaporation loss is minimized. Therefore, liquid nitrogen can products are widely used in animal husbandry, medical treatment and scientific research, mechanical processing and other fields. Liquid nitrogen is used as a refrigerant to preserve animal semen, organs, bacteria and other organisms. Samples, cryogenic processing of metal materials, and cryogenic assembly of precision parts.
1, animal semen activity preservation. At present, it is mainly used for the preservation of semen of oxen and goats and rare animals (such as giant pandas) as well as long-distance transportation.
2. The preservation of biological specimens. In the field of biomedicine, vaccines, strains, cells, and organs of humans and animals can all be soaked in liquid nitrogen stored in liquid nitrogen tanks for long-term active preservation and transportation. When you need to use, take out the thawing rewarming.
3, cryogenic processing of metal materials. The cryogenic treatment of metal materials using liquid nitrogen stored in liquid nitrogen tanks can change the metallographic structure of the metal materials and significantly increase the physical properties of the metal materials such as hardness, strength, and wear resistance.
4. Cryogenic assembly of precision parts. The assembly of precision parts after cryogenic treatment with liquid nitrogen can improve the assembly quality, thereby improving the performance of the equipment or instrument.
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