What is the thermal conductivity of alumina ceramics? The higher the better? How to detect it?

Release time:

2022/12/27

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What is the thermal conductivity of alumina ceramics? The higher the better? How to detect it?

What is the thermal conductivity of alumina ceramics? The higher the better? How to detect it?
Alumina ceramic is a ceramic material based on alumina (Al2O3), which is used for thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic wave should be used for washing. Alumina ceramic is a widely used ceramic. Because of its superior performance, it has been more and more widely used in modern society, meeting the needs of daily use and special performance.  
Because alumina ceramic tubes have many characteristics that other tubes do not have, many people prefer to choose them, which is also one of the reasons for their rapid development in recent years
What is the thermal conductivity of alumina ceramics? How to test?        
Thermal conductivity of alumina ceramics: material - thermal conductivity (W/m? K) alumina ceramics - 29.3 beryllium oxide ceramics - 196.8; Probably the thermal conductivity can reach 30W/M * K. The price of boron nitride and aluminum nitride is relatively high, 200 yuan/KG, and the thermal conductivity can reach 100-200W/M * K. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. Its thermal conductivity varies greatly with temperature. Laser flash method is required for thermal conductivity test.  
Next, we want to talk about the alumina ceramic itself. In fact, this material is not entirely made of aluminum oxide, but is added with aluminum oxide components during construction. The addition of aluminum oxide greatly increases its thermal conductivity. This is a creative attempt, and also greatly increases the possibility of ceramic materials. In addition, there are other substances added into the conduit, For example, copper, a metal element, also increases the possibilities of ceramics. You may not have a specific understanding of the thermal conductivity of this material here, but don't worry. We can look at this problem in the same way. In fact, the thermal conductivity of alumina ceramics has reached 29.3 orders of magnitude. If you still can't understand, we can refer to some relevant parameters of plastics. Generally, the thermal conductivity of plastics is only a few orders of magnitude, and the ceramic material is hundreds of times higher, It can be seen that the thermal conductivity of our emerging ceramic materials is still very good.

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