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Two processes for target coating
Common coating processes include PVD (physical vapor deposition) process and CVD (chemical coating). Let’s briefly introduce these two processes. 1) PVD (Physical Vapor Deposition) process: refers to using physical methods under vacuum conditions to vaporize the surface of the material source into gaseous atoms, molecules or partially ionized into ions, and through a low-pressure gas (or plasma) process, on the matrix A technique for depositing thin films with certain special functions on the surface. The main methods of physical vapor deposition include vacuum evaporation, sputtering coating, arc plasma plating, ion plating, and molecular beam epitaxy. Up to now, physical vapor deposition technology can not only deposit metal films and alloy films, but also deposit compounds, ceramics, semiconductors, polymer films, etc. Among them, the indium tin target ITO used in display panels mainly uses vacuum coating. 2) CVD (chemical coating process) technology: This technology relies on chemical reactions at high temperatures to introduce the vapor of gaseous reagents or liquid reagents that constitute the film elements and other gases required for the reaction into the reaction chamber, and on the surface of the substrate A technology that produces thin film materials through chemical reactions. Among them, vacuum coating has better repeatability...
2024-01-22 Learn More
Comparison of white molybdenum wire and black molybdenum wire
white molybdenum wire White molybdenum wire is also called clean molybdenum wire. It uses electrolytic cleaning or hydrogen sintering cleaning method to clean the surface of molybdenum wire to remove the graphite coating on the surface. After cleaning, the surface will be bright and shiny. The diameter of the cleaning molybdenum wire ranges from 0.05 to 3mm. Its surface condition should be bright and free of oxidation, rust or spots. Its characteristics: high strength, good electrical conductivity, bright and shiny surface, fast cutting speed, long service life, etc. It is usually used for wire cutting, production of electric light source parts, electric vacuum devices, production of heating elements and refractory materials for high-temperature furnaces. In addition, it is also used as spray molybdenum wire and wear-resistant parts of automobiles to improve their mechanical wear resistance. Black molybdenum wire Black molybdenum wire is made of molybdenum wire coated with graphite coating, and its surface color is black. It is always curved or straight. In addition, it is produced through annealing. It mainly refers to a consumable made of precious metals such as molybdenum that continuously moves with a high-voltage electric field to cut the workpiece during wire cutting processing. That is,...
2024-01-15 Learn More
Application of tungsten copper electrode in the field of electric discharge machining
Electrical discharge machining (EDM), also known as electric discharge machining (EDM), continuously generates pulsed discharge sparks between the tool and the workpiece during the machining process. Its advantage is that it can process difficult-to-cut materials, very hard materials such as cemented carbide, and various High speed steel and even diamond and cubic boron nitride. Tungsten copper electrodes are widely used in the field of EDM due to their good physical and chemical properties. Tungsten copper electrode is an alloy material with tungsten and copper as its main components. It has the characteristics of high strength, fast heat dissipation, good electrical conductivity, excellent thermal conductivity, excellent high temperature resistance and arc ablation resistance, and is widely used. In fields such as electric discharge machining, resistance welding, and electrochemical machining. In EDM, tungsten copper electrodes can effectively improve processing efficiency, reduce electrode loss, improve the accuracy of molds and components, and can complete rough machining and finishing of products in one go. In addition, because the tungsten copper material has high strength and density, it can withstand greater mechanical pressure and heat, thus avoiding errors caused by electrode deformation. In order to ensure the stability during EDM and improve the utilization of...
2024-01-08 Learn More
The use of tungsten in electrochromic glass
The thin film coating will change the color of the film due to the absorption of external energy. This material is called an electrochromic material. The electrochromic effect of the tungsten trioxide film is closely related to its microstructure. Yellow tungsten oxide, tungsten trioxide, is a typical representative of inorganic electrochromic materials. The principle is to adjust the light transmittance by changing the size of the current to achieve dimming from transparent to opaque. Regarding the electrochromic mechanism of WO3 films, the current intervalence transition theory proposed by Faughnan is that due to the effect of an external electric field, electrons and cation minerals are simultaneously injected into WO3 from both sides of the film, and the electrons are captured by W atoms to form a localized state. The ion M+ resides in this area to form a dark blue tungsten bronze compound Mx WO3. There are W ions of different valence states in Mx WO3. The transition of electrons between adjacent W atoms of different valence states causes the color of the WO3 film to change. The yellow tungsten oxide electrochromic film utilizes the electrochromic properties of tungsten trioxide and is prepared by physical vapor deposition, chemical vapor deposition,...
2024-01-02 Learn More

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