• Common Vacuum Terminology 4

    Common Vacuum Terminology 4

    1.ψ collision rate:In a given time interval, the average number of collisions of a molecule (or other specified particles) relative to other gas molecules (or other specified particles) divided by that time. The average number of collisions should be obtained at a sufficient number of molecules and a sufficient time interval.China Decorative Vacuum Coating Machine Manufacturers 2.χ volume collision rate:In a given time interval, the average number of collisions between gas molecules in the space... read more

    Nov 09,2019 Industry News
  • Common Vacuum Terminology 3

    Common Vacuum Terminology 3

    ranges of vacuum:The vacuum region is roughly divided as follows:                       Pa        Torr Low vacuum:            105~102         760~1 Medium vacuum:          102~10-1        1~10-3 High vacuum:            10-1~10-5       10-3~10-7 Ultra-high vacuum:       <10-5           <10-7 gas:Substances that are free to occupy any space and are not subject to intermolecular interactions. Note: In vacuum technology, the term "gas" is not strictly applied to non-condensable gases and steam... read more

    Nov 01,2019 News
  • Common Vacuum Terminology 2

    Common Vacuum Terminology 2

    1.Pa pascal:International unit of pressure, 1Pa = 1N/m2. 2.Torr torr:Unit of pressure, 1 Torr = 1/760 atm.China PVD Coating Systems suppliers atm standard atmosphere:Unit of pressure, 1atm=101325Pa。 3.mbar millibar:Unit of pressure, 1mbar=102Pa。 4.partial pressure:Pressure of a component in a mixture of gases. pressure:The sum of the pressures of all components in the mixture. 6.vacuum:The state of a gas below ambient atmospheric pressure in a specified space. of vacuum:The degr... read more

    Oct 26,2019 Industry News
  • Common Vacuum Terminology1

    Common Vacuum Terminology1

    standard ambient condition:The temperature is 20℃, the relative humidity is 65%, and the atmospheric pressure is101325Pa=1013.25mbar=760Torr。PVD Coating Systems suppliers standard reference conditions for gases:The temperature is 0℃ and the pressure is101325Pa. p pressure:When a gas molecule passes through a hypothetical plane, the momentum change rate along the normal direction of the plane is divided by the plane area or the normal component of the force acting on the surface of the container ... read more

    Oct 19,2019 Industry News
  • A solid surface is bombarded with energetic particles

    A solid surface is bombarded with energetic particles

    sputtering deposition Basic Principles A solid surface is bombarded with energetic particles (usually positive ions accelerated by an electric field). Sputtering of atoms and molecules on solid surface after exchanging kinetic energy with incident energetic particles is called sputtering. Sputtered atoms (or clusters) have a certain amount of energy. They can be re-deposited and condensed on the surface of solid substrates to form thin films, called sputtering coatings.China Plasma Coating Machi... read more

    Oct 12,2019 Industry News

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