High frequency porcelain has high thermal conductivity
With the development of electronic industry, especially the appearance of thick film, thin film circuit and microwave integrated circuit, higher requirements are put forward for the packaging of ceramic and substrate.New ceramic materials, such as beryllium oxide ceramics and boron nitride ceramics, were studied, and aluminum nitride ceramics and silicon carbide ceramics were developed.
Their common feature is high thermal conductivity.
High-frequency porcelain is insulation ceramics, also known as ceramics.It is mainly used for the installation, fixation and protection of electronic equipment, and provides insulation support for current-carrying conductor and ceramics on various integrated subgrade boards.Low dielectric constant, low dielectric loss, high mechanical strength, high insulation strength, insulation resistance and thermal conductivity.With the development of electronic industry, high alumina ceramics mainly include dielectric ceramics, talc ceramics, etc., especially thick film and film circuit and microwave integrated circuit.Higher requirements are put forward for ceramic packaging and substrate.Beryllium oxide ceramics and boron nitride ceramics have many new varieties. The development of aluminum nitride ceramics and the research of silicon carbide ceramics have the characteristics of high thermal conductivity.
High-frequency porcelain is mainly composed of alpha-alumina, which accounts for more than 75% of all kinds of ceramics.It has excellent mechanical and electrical properties and is one of the most widely used high-frequency insulating ceramics.It can be used as high power insulation component of uhf and vacuum electronic device, used for making ceramic shell of vacuum condenser, window of microwave ceramic component, ceramic substrate with talc ceramic and natural mineral as main raw material, compact pyroxene as main crystal phase, excellent birefringence and other multimedia ceramic substrates.RIC features and low prices.Disadvantages are large thermal expansion coefficient, poor thermal stability, low strength.Compared with high-alumina talc ceramics, talc ceramics are widely used in the manufacture of switches, sockets, adjustable capacitor components and shafts, ceramic plates, transformer inductance coil skeletons, etc.
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