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• 02

  2021-06

  Vacuum degassing of materials

  For general vacuum equipment, the venting of materials is the most important source of gas in the vacuum system. Therefore, the purpose of vacuum degassing is to remove as much of ···

• 30

  2021-05

  Advantages and disadvantages of plastic

  advantage: 1. Lightweight Plastics are generally lighter, with a density in the range of 0.83~2.3g/cm3, which is only 1/7~1/4 of steel and 1/2 of aluminum. This is very beneficial ···

• 28

  2021-05

  The nature and influencing factors of thermal expansion coefficient

  The phenomenon that the volume or length of an object increases with the increase in temperature is thermal expansion. The coefficient of thermal expansion is a physical quantity u···

• 22

  2021-05

  Breakdown of solid media

  Under the action of an electric field, the breakdown of solid media may be caused by electrical processes (electric breakdown), thermal processes (thermal breakdown), and electroch···

• 21

  2021-05

  Gas insulation properties of sulfur hexafluoride(SF6)

  Sulfur hexafluoride (SF6) gas only began to be used as an insulating medium and arc extinguishing medium in certain electrical equipment (first of all, circuit breakers) in the 196···

• 20

  2021-05

  Ways to improve the electrical strength of gaseous media

  In order to reduce the size of power facilities, it is always desirable to make the air gap length or insulation distance as small as possible. For this reason, measures must be ta···

• 17

  2021-05

  Graphite heating element in vacuum furnace

  Many components of the vacuum resistance furnace can be made of graphite, of which heating elements and reflective screens are the most widely used. In the past, heating elements o···

• 17

  2021-05

  Overview of high temperature venting

  Except in individual cases, material outgassing is the main source of gas for high vacuum and ultra-high vacuum systems and sealed electric vacuum devices. With the outgassing of m···

• 14

  2021-05

  Common materials in vacuum systems

  Part nameLow vacuum and high vacuumUltra-high vacuumHousing, pipelines, valves, internal partsOrdinary carbon steel, stainless steelStainless steel, titanium, high-purity aluminumS···

• 12

  2021-05

  J-type thermocouple materials and characteristics

  J-type thermocouple, namely iron-copper-nickel thermocouple, also known as iron-constantan thermocouple, is also a kind of low-cost metal thermocouple. Its positive electrode (JP) ···

• 11

  2021-05

  How to choose a thermocouple?

  Thermocouple is the most common contact type temperature measuring element, which occupies a very important position in the field of temperature measurement. In order to cope with ···

• 10

  2021-05

  Vacuum heat treatment technology

  The rise and rapid development of vacuum heat treatment technology, on the one hand, stems from the needs of industrial technology development, and on the other hand, because vacuu···

• 08

  2021-05

  Design requirements for vacuum vessels

  The content and requirements of the overall design of the vacuum vessel are as follows. ①Determine the vacuum range in the vacuum container. According to the standard, the degree o···

• 28

  2021-04

  Pretreatment of glass-to-metal sealing parts

  After the metal parts and the connected glass parts are made according to the requirements on the drawings, they must first be cleaned and dried. The surface of the joint must be g···

• 27

  2021-04

  Flexible vacuum tube

  In vacuum system assembly, flexible vacuum pipe joints are used to adapt to thermal expansion or position adjustment (relative movement between parts is required), or to isolate vi···

• 27

  2021-04

  Fluorine rubber sealed ultra-high vacuum flange

  Fluorine rubber can withstand high-temperature baking at 250~300℃, and can work at 125℃ for a long time under pressure. It has a lower outgassing rate than the commonly used nitril···

• 26

  2021-04

  D-SUB connector overview

  D-SUB connector, DB connector for short, is a large type of rectangular connector, which is a standard for the interface shape and structure of electrical connectors. D-SUB connect···

• 26

  2021-04

  Overview of cryopumps

  The low-temperature surface placed in the vacuum container has the function of pumping air. This kind of pump that uses the low-temperature surface to condense and adsorb gas to ac···

• 25

  2021-04

  Characteristics and applications of plastics

  Plastic is malleable. As the name suggests, plastic is a material that can be molded. The so-called plasticity of plastic means that the solid plastic can be softened by heating, a···

• 24

  2021-04

  The composition of plastic

  The plastic we usually use is not a pure substance, it is made up of many materials. Among them, high molecular polymers (or synthetic resins) are the main components of plastics. ···