High-purity helium

Retail price

0.0

元

Market price

0.0

元

Number of views:

1000

Product serial number

Quantity

Stock:

Category

BACK



Product description

Parameters

　　High-purity helium:

　　Product Name: high-purity helium high, purity, helium

　　Molecular formula: He

　　The purity of the product is not less than 99.999

　　Some other unique physical properties of high-purity helium in different environments are shown in the list below:

　　Liquid density (4.20K, 100.312kPa):125.2kg/m

　　Gas density (0 DEG C, 101.325kPa):0.1785kg/m

　　Relative density (gas, 0 DEG C, 101.325kPa):0.138

　　Specific volume (21.1 DEG C, 101.325kPa):6.0304m/kg[2] gas liquid volume ratio (15 DEG C, 100kPa):748L/L

　　Critical temperature: -268.0 DEG C

　　Critical pressure: 229kPa

　　Critical density: 69.3kg/m

　　Heat of fusion (1.2K, 2555kPa):0.0836kJ/kg

　　Gasification heat (-268.926 DEG C, 101.325kPa):20.42kJ/kg

　　Specific heat capacity (gas, 25 DEG C, 101.325kPa),:Cp=5238.3J/ (kg, K), Cv=3213.7J/ (kg, K)

　　Heat (gas, 25 DEG C, 101.325kPa:Cp/Cv=1.63)

　　Vapor pressure (0.5K):0.0000022kPa (2.0K):3.17kPa (5.0K):197.1kPa

　　Viscosity (0 DEG C, 101.325kPa):0.01864mPa * S (liquid, 3.0K):0.0033mPa = S

　　Surface tension (4.2K):0.096mN/m

　　Thermal conductivity (0 DEG C, 101.325kPa):0.1426W/ (m * K) (liquid, 2.4K):0.01883W/ (M = K)

　　Refractive index (gas, 0 DEG C, 101.325kPa):1.000035

　　Applications: helium is commonly used in spacecraft or advertising balloons because of its poor chemical properties and lighter air properties. This is also well known. In the field of marine development and breathing gas mixtures, the use of superconducting electromagnet cooling and medical field magnetic resonance imaging devices, helium has been widely used in scientific research, military industry, petrochemical, refrigeration, medical, semiconductor, pipeline leak detection, superconducting experiment, metal manufacturing, deep-sea diving, high precision welding, optoelectronic products production.

Scan the QR code to read on your phone