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• 07

  2022-04

  Factors affecting the heat resistance of glass

  (1) Expansion coefficient It can be known from the calculation formula of heat resistance of glass: heat resistance is inversely proportional to the coefficient of expansion. There···

• 14

  2022-01

  Insulation properties of ceramics

  Generally speaking, insulating ceramics are multiphase polycrystalline materials obtained by molding and sintering powder raw materials. The microstructure of ceramics can be mainl···

• 10

  2022-01

  Factors Affecting Welding Temperature Field

  The factors affecting the welding temperature field can be summarized into the following main aspects. 1. The influence of heat source Different heat sources affect the temperature···

• 29

  2021-12

  Stress concentration caused by welding defects

  Cracks, lack of fusion and lack of penetration in welded joints are more harmful than pores and slag inclusions. They not only reduce the effective load-bearing cross-sectional are···

• 24

  2021-12

  The influence of welding defects on the structural load-bearing strength

  When clusters or dense pore defects appear in the weld, the cross-section of the pores is larger, and at the same time, the mechanical properties of the weld may be reduced (such a···

• 21

  2021-12

  The main properties of PEEK (polyether ether ketone)

  PEEK is a kind of crystalline high temperature resistant thermoplastic engineering plastic with excellent comprehensive performance, and it is also a kind of polyaryletherketone po···

• 17

  2021-12

  Requirements for metals and their alloys that can be connected to glass

  In the production of electronic devices, there are many types of metals that are often connected to glass, but not all metals can form connectors with glass. The metal that can for···

• 15

  2021-12

  Electric strength of solid insulation

  As we all know, the electrical strength of solid insulation is far greater than the electrical strength of air; the insulation distance through solid insulation materials is usuall···

• 11

  2021-12

  Ways to eliminate interference

  Some basic anti-jamming methods available are as follows: 1. Shield; 2. Grounding; 3. Balance; 4. Filtering; 5. Isolation; 6. Separation and positioning; &n

• 07

  2021-12

  Welding of thermocouple materials

  The commonly used welding methods for thermocouple materials include gas welding, carbon arc and mercury arc welding. 1. Gas welding Gas welding uses a flame combusted by a mixed g···

• 29

  2021-11

  Characteristics of vacuum brazing

  Vacuum brazing has been widely used in the field of vacuum cryogenic technology, in aerospace, nuclear industry, and electronic devices. It is inseparable from its unique welding a···

• 18

  2021-11

  Principles and characteristics of brazing

  Brazing is to use a metal material with a lower melting point than the base material as the brazing filler metal. The weldment and the brazing filler metal are heated to a temperat···

• 15

  2021-11

  Features of laser welding

  Industrial lasers have been widely used as an efficient and reliable production tool. In some fields, laser welding has become an alternative technology to some traditional welding···

• 25

  2021-10

  Shielding effect of coaxial cable

  Coaxial cable is a commonly used shielded cable that can suppress electromagnetic leakage of transmitted electrical signals and shield electromagnetic interference in abnormal envi···

• 14

  2021-10

  The heating problem of stepper motor and its treatment

  (1) Why does the stepper motor heat up? For various stepping motors, the interior is composed of iron core and winding coils. The winding has resistance, and power will produce los···

• 08

  2021-10

  Structural design requirements for pressure vessels

  The safety of pressure vessels involves all aspects of design, manufacturing, installation and use. Considering the safety and reliability of the component structure from a design ···

• 28

  2021-09

  Features of ceramic connection

  Due to the essential difference between the atomic structure of ceramic materials and metals, coupled with the special physical and chemical properties of the ceramic itself, there···

• 18

  2021-09

  Laser welding

  Laser beam welding is a type of fusion welding. The laser uses the principle of stimulated emission of atoms to stimulate the working material to produce a beam of high monochromat···

• 08

  2021-09

  Noise source in the circuit

  All electrical signals except useful signals in the circuit are noise. This definition does not apply to distortion caused by non-linearity in the circuit. Although these distortio···

• 07

  2021-09

  Selection of temperature and time during baking and degassing

  In all high vacuum systems, especially in the application of ultra-high vacuum systems, it is very important to release and exclude gas from the materials constituting the vacuum s···