At present, ceramic substrates commonly used in the thermal ceramics industry mainly include aluminum nitride ceramic substrates and alumina ceramic substrates. So what is aluminum nitride ceramics, what is aluminum oxide ceramics, and what are the differences between the two ceramic substrates, the following is a summary of Jiayi Fengtai Xiaobian:
First, we analyze the aluminum nitride ceramic substrate:
1. Aluminum nitride ceramics English: Aluminium NitrideCeramic is a ceramic with aluminum nitride (AIN) as the main phase.
2, AIN crystal with (AIN4) tetrahedron as a structural unit covalent bond compound, with wurtzite structure, is a hexagonal system.
3. Chemical composition AI 65.81%, N34.19%, specific gravity 3.261g/cm3, white or off-white, single crystal colorless and transparent, sublimation decomposition temperature under normal pressure is 2450 °C.
4. Aluminum nitride ceramic is a kind of high temperature heat resistant material with thermal expansion coefficient (4.0-6.0) X10(-6)/°C.
5, polycrystalline AIN thermal conductivity of 260W / (mk), 5-8 times higher than alumina, so heat shock resistance, can withstand 2200 ° C high temperature.
6. Aluminum nitride ceramics have excellent corrosion resistance.
Next, introduce the alumina ceramic substrate:
1. Alumina ceramic is a ceramic material mainly composed of alumina (Al2O3) for thick film integrated circuits.
2. Alumina ceramics are closely packed hexagonal structures composed of oxygen ions in Al2O3 ceramic materials.
3. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic cleaning is required.
4. Alumina ceramics have high melting point, high hardness and excellent wear resistance.
5, a wide range of applications, applied to high-power equipment, IC MOS tube, IGBT chip-type thermal insulation, high-frequency power, communications, mechanical equipment, high-current, high-voltage, high-temperature and other products that require thermal and thermal insulation.
Through the introduction of the above aluminum nitride ceramic substrate and alumina ceramic substrate, we can see that the difference between them is still very large. Everyone must choose the ceramic substrate suitable for their own products when purchasing, more about the ceramic substrate. For knowledge, please log on to Jiari Fengtai's official website: http:// for online consultation or call the national toll-free hotline directly.
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