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Rare gases

Current Position:Product > Rare gases

Name: Kr
Classification: Rare gases
Applicable way:




Product Description: rare gases krypton is colorless, odorless, non-toxic, inert, krypton concentrated in the atmosphere, possession 1.1ppm in the atmosphere. Mainly used in halogen lamps, rice lights, efficient fluorescent lamps, counter, laser light source, ultraviolet source, standard gas, special gas mixture and so on. Krypton gas having a larger molecular weight than argon and a low thermal conductivity, so that krypton gas fill becomes excellent. Filled with krypton lamps are: incandescent, fluorescent, flash arc lamp, iodine lights. Krypton lamp with power than argon lamp energy saving of 20% to 25%, long-life of 2 to 3 times. On an airplane runway, usually filled with krypton arc lamps do flash lighting, because of its ability to penetrate the fog is very strong. Krypton can absorb X-rays, X-rays can be used as the light shielding material at work. Can be used to make atomic lights do not need electricity. Transmittance krypton lamp is particularly high, and thus can be used for off-road lights on the night of the chariot.


Note: krypton gas is a colorless, odorless, non-toxic and non-burning and stores them in the high-pressure gas cylinders. When increasing the krypton content of less than 19.5 percent oxygen content leads may cause suffocation. Bottled krypton gas filling for high pressure, should be used after decompression buck before use. Life on the packaging of cylinders are used, where the expired gas cylinders must be taken to have a safety inspection department before they can continue to use. Bottle when using the exhaust gas, and pressure in the bottle should be kept 0.5MPa, more than the minimum of not less than 0.25MPa pressure cylinder valve should be closed to ensure the gas quality and safe to use. Bottled krypton gas transport and storage, the use of classification should be stacked, non-combustible gas and combustion gas stacked together, are not allowed near open flames and heat sources, do not get near the fire should be, not contaminated with oil wax, not prolonged sun exposure, not weight throw Do not hit, were prohibited in the cylinder body arc or arc, rough handling is strictly prohibited.


Physicochemical properties of krypton
Molecular Weight: 83.80
Melting point (73.15kPa): -157.4 ℃
Boiling point (101.325kPa): -153.4 ℃
Liquid density (-153.35 ℃, 101.325kPa): 2413 kg / m3
Gas density (0 ℃, 101.325kPa): 3.74kg / m3
The relative density (gas, 25 ℃, 101.325kPa): 2.89
Hematocrit (21.1 ℃, 101.325kPa): 0.2878m3 / kg
Gas-liquid volume ratio (15 ℃, 100kPa): 688L / L
Critical temperature: -63.8 ℃
Critical pressure: 5490kPa
Critical Density: 908 kg / m.
Compression factor:

Compression factor
1 0000kPa
The heat of fusion (-157.20 ℃, 73.1kPa): 19.51 kJ / kg
Heat of vaporization (-153.35 ℃, 101.325kPa): 107.81 kJ / kg
Specific heat capacity (25 ℃, 101.325kPa): Cp = 251.04 J / (kg · K)
Cv = 150.62J / (kg · K)
Specific heat ratio (gas, 25 ℃, 101.325kPa): Cp / Cv = 1.667
Vapor Pressure (112.05K): 53.329kPa
(155.15K): 1013.250kPa
(206.65K): 5066.250kPa
Viscosity (gas, 0 ℃, 101.325kPa): 0.02330mPa · S
(Liquid, -153.4 (℃): 0.431mPa · s
Surface tension (-150 ℃): 16.3mN / m
Thermal conductivity (0 ℃, 101.325kPa): 0.008834W / (m · K)
(Liquid, -153.4 ℃: 0.08828 W / (m · K)
Refractive index (gas, 0 ℃, 101.325kPa, 5893?): 1.0R0427