Ultrapure nitrogen

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　　Ultrapure nitrogen:

　　Product Name: ultra pure nitrogen high, purity, nitrogen

　　Molecular formula: N2

　　The purity of the product is not less than 99.999%

　　Properties: purity is greater than 99.999%. Colorless, odorless, tasteless, non-toxic inert gas. The relative density is DS (21.1 DEG C, air =1) 0.967. Gas density 1.153kg/m3 (21.1 DEG C, 101.3kPa); liquid density 808.5kg/m3 (-195.8 DEG C, 101.3kPa). Boiling point -195.8 DEG C. Melting point -209.9 DEG C. Nitrogen purification methods are mainly adsorption, pressure swing adsorption, membrane separation and so on. Used in the manufacture of integrated circuits, semiconductors and electronic vacuum devices, as carrier gas for protecting gas and carrier gas, chemical vapor accumulation, and carrying gas for liquid diffusion sources, as protective gas for devices in high temperature diffusion furnaces. High purity nitrogen is used in displacement, drying, storage and transportation gases in processes such as epitaxy, lithography, cleaning and evaporation. The purity of nitrogen is more than 99.99% in the manufacture of kinescope. In space technology, liquid hydrogen filling system must first use of high purity nitrogen replacement, and then the high purity hydrogen replacement.

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