Types of electronic ceramics Electronic ceramic refers to ceramic that can be used as electronic or magnetic in the electronic industry.Electronic ceramics are ceramics with new functions through precise control of surface, grain boundary and size structure.In energy, household appliances, automobiles and other aspects can be widely used.Get more news about https://www.zjwelahead.com Electronic Ceramics,you can vist our website! Widely used in the production of electronic functional components, mostly composed of oxide sintered body materials.The manufacturing process of electronic ceramics is similar to that of traditional ceramics. Electronic ceramics or electronic industrial ceramics, it in the chemical composition, microstructure and mechanical and electrical properties, and the general electric power ceramics with the essential difference.Is the difference between the electronics industry for electronic ceramics have put forward a series of special technical requirements, which formed one of the most important is must has high mechanical strength, resistance to high temperature and high humidity, radiation resistance, dielectric constant changes in a very wide scope, dielectric loss tangent Angle is small, the temperature coefficient of capacitance can be adjusted (or capacitance change rate can be adjusted).High electrical strength and insulation resistance, and excellent aging performance. Electronic ceramics can be divided into five categories according to their functions and USES: insulator ceramics, capacitor ceramics, ferroelectric ceramics, semiconductor ceramics and ionic ceramics. Insulating porcelain Referred to as device porcelain, it has excellent electrical insulation performance and is used as electronic ceramics for structural parts, substrates and shells of electronic equipment and devices.A perfect The porcelain parts of the edge device include various insulators, coil skeletons, electron tube bases, band switches, capacitor supports, integrated circuit substrates and packaging shells, etc.The basic requirements for this kind of porcelain are low dielectric constant, low dielectric loss tan delta, high dielectric resistivity rho, high breakdown strength E, good dielectric temperature characteristic and frequency characteristic.In addition, it requires high mechanical strength and chemical stability. Talc and alumina are the most widely used ceramics of this kind.Their main crystalline phase compositions are MgSiO3 and Al2O3 respectively.Talc porcelain is a typical high frequency device porcelain used in radio frequency band because of its excellent electrical insulation and low cost.Alumina porcelain is a kind of high frequency, high temperature and high strength equipment porcelain with better electrical insulation.Its electrical and physical properties increase with the content of alumina.High-alumina porcelain with 75%, 95% and 99% alumina is commonly used.In some demanding integrated circuits, pure corundum porcelain containing 99.9% alumina is even used, whose properties are similar to those of sapphire single crystal. There is also a kind of high thermal conductivity porcelain represented by beryllium oxide (BeO).The thermal conductivity of bea 95% is the same as that of metal at room temperature.Beryllium oxide also has good dielectric properties, temperature resistance and high mechanical strength.The disadvantage is that the toxicity of BeO material is very high and the firing temperature of porcelain material is high, so its application is limited.Boron nitride (BN) porcelain and aluminum nitride (AlN) porcelain also belong to high thermal conductivity porcelain. Although their thermal conductivity is not as good as beryllium oxide porcelain, it is non-toxic and has good processing and dielectric properties. They can be used for heat dissipation and insulation in high-frequency high-power transistors and large-scale integrated circuits.