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Diamond Wire Ring Saw Cutting NdFeB Magnets
Diamond Wire Ring Saw Cutting NdFeB Magnets Neodymium magnets, also known as NdFeB magnets, are tetragonal crystals formed from neodymium, iron, and boron (Neodymium 2 Iron 14B). This magnet is the second most magnetic permanent magnet available today after absolute zero holmium magnets. It is also the most commonly used rare earth magnet. NdFeB is divided into two types: sintered NdFeB and bonded NdFeB. Bonded NdFeB is magnetic in all directions and is corrosion-resistant; Sintered NdFeB is easy to corrode, and the surface needs electroplating. Generally, there are galvanized, nickel, environmentally friendly zinc, environmentally friendly nickel, nickel-copper-nickel, and environmentally friendly nickel-copper-nickel. Sintered NdFeB is generally divided into Axial magnetization and radial magnetization, determined according to the required working surface. For cutting large NdFeB magnets, many manufacturers use reciprocating long wire cutting, while small NdFeB magnets are cut with an inner diameter cutting machine. The cutting efficiency of the inner diameter cutting machine is low, but sometimes cutting a small amount of NdFeB magnets does not require opening Large machine. With the rise of diamond wire trepanation saws, some manufacturers began to use diamond wire trepanation saws to cut NdFeB. The cutting efficiency is 3 times that of the inner diameter...
Silicon carbide processing technology
Silicon carbide processing technology Silicon carbide wafers use high-purity silicon powder and high-purity carbon powder as raw materials, and use physical vapor transmission (PVT company) to grow silicon carbide crystals and process them into silicon carbide wafers. (1) Raw material synthesis. Mix high-purity silicon powder and high-purity carbon powder in a certain proportion, and the silicon carbide particles are reacted and synthesized at a high temperature of 2,000 °C. After crushing, cleaning and other processes, high-purity silicon carbide particles that meet the requirements of crystal growth are obtained. Silicon carbide micro powder raw material. (2) Crystal growth. Using high-purity silicon carbide powder as raw material, using an independently developed crystal growth furnace, silicon carbide crystals are grown using the physical vapor transport method (PVT method). Place high-purity silicon carbide powder and seed crystals at the bottom and top of a cylindrical sealed graphite crucible in a single crystal growth furnace, respectively. The crucible is heated to above 2000°C through electromagnetic induction, and the temperature at the seed crystal is controlled to be slightly lower than the temperature at the bottom of the micropowder, forming an axial temperature gradient in the crucible. Silicon carbide powder sublimates at high temperatures to form...
How to process silicon carbide?
How to process silicon carbide? Silicon carbide (sic) materials are the main development direction of the power semiconductor industry. Used in the manufacture of power devices, it can significantly improve power utilization. In the foreseeable future, new energy vehicles will be the main application scenario of silicon carbide power devices. As a technology pioneer, Tesla took the lead in integrating all-silicon carbide modules3 into Models, and other first-tier car companies are also planning to expand the application of silicon carbide. As the manufacturing cost of silicon carbide devices decreases and process technology gradually matures, silicon carbide The power device industry has broad prospects. What is silicon carbide? Silicon carbide (sic) is the third generation compound semiconductor material. The cornerstone of the semiconductor industry is chips. The core materials for manufacturing chips are divided into: First-generation semiconductor materials (mostly high-purity silicon is currently widely used), second-generation compound semiconductor materials (gallium arsenide, indium phosphide), and third-generation compound semiconductor materials (silicon carbide, gallium nitride). Due to its superior physical properties: high band gap (corresponding to high breakdown electric field and high power density), high electrical conductivity, and high thermal conductivity, silicon carbide will be the most widely used basic material for manufacturing semiconductor...
Silicon carbide wafer applications and future development trends
Silicon carbide wafer applications and future development trends Silicon carbide (sic) is the main development direction of the power semiconductor industry, and its application in power device manufacturing can significantly improve power utilization. In the foreseeable future, new energy vehicles will be the main application scenario of silicon carbide power devices . Compared with traditional silicon materials, silicon carbide is a typical representative of the third generation of semiconductor materials. It has the characteristics of wide bandwidth, high temperature resistance, high voltage resistance, high frequency, high power and radiation resistance. It has the advantages of fast switching speed and high efficiency, which can greatly reduce product power consumption, improve energy conversion efficiency, and reduce product volume. It will become the most widely used basic material for manufacturing semiconductor chips in the future. Silicon carbide wafer is a single wafer formed by cutting, grinding, polishing and cleaning silicon carbide crystals. As a semiconductor substrate material, silicon carbide wafer can be made into silicon carbide-based power devices and microwave radio frequency devices through epitaxial growth and device manufacturing. It is the first Important basic materials for the development of the third-generation semiconductor industry.
Excellent properties and application fields of silicon carbide ceramics
Excellent properties and application fields of silicon carbide ceramics As a high-performance structural ceramic material, silicon carbide ceramics have excellent comprehensive properties that cannot be matched by structural materials such as metals: (1) High temperature strength, small high temperature creep, suitable for various high temperature environments. (2) Low thermal expansion coefficient, high thermal conductivity, and excellent thermal shock resistance. (3) High chemical stability and good corrosion resistance. (4) High hardness, low friction coefficient, excellent wear resistance. (5) Low density, high elastic modulus. (6) The resistivity characteristics can be customized and can be used as semiconductor characteristics, so it can be widely used in many fields. Silicon carbide ceramics are generally used as high-temperature kiln furniture materials in roller kilns, tunnel kilns, and shuttle kilns for high-end daily-use ceramics, sanitary porcelain, high-voltage electric porcelain, glass and other industries. Silicon carbide ceramics have excellent high temperature strength, excellent high temperature creep resistance and thermal shock resistance, and are one of the main materials for thermal engine components in rockets, aircraft, Automobile engines and gas turbines. For example, the AGT100 automotive ceramic gas turbine developed by General Motors uses silicon carbide ceramics as high-temperature components such as combustion chamber rings, combustion chamber cylinders,...
What is the difference between quartz glass and ordinary glass?
What is the difference between quartz glass and ordinary glass? When it comes to quartz glass, I believe many people don’t know what it is, of course, some people do. It has a series of excellent properties that ordinary glass can’t match, and is praised as the “King of Glass” by experts in the field of new materials. 1. Different hardness The hardness of the former can generally reach Mohs 7, while the hardness of the latter can generally only reach around 5.5 to 6. 2. Different light transmittance The former can transmit infrared and ultraviolet rays, while the latter cannot. 3. Different colors The former is generally colorless, and the latter is generally colorful. 4. Different high temperature resistance After the former is burned red, it is not easy to burst even if it is immediately put into water, and the latter will burst immediately once it burns. What are the precautions for using quartz glass 1. The products produced are usually valuable products, so when you take the products, you must be careful and handle them carefully. 2. The high temperature resistance of quartz glass is limited, so when you use it, you must not exceed the specified...

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