1. What material is alumina ceramics?
Many friends don’t know much about what alumina ceramics are used for, so let’s take a look. What material is alumina ceramic?
Alumina ceramic is a ceramic material based on alumina. Alumina ceramic has good conductivity, mechanical strength and high temperature resistance.
2. What is the high temperature resistance of alumina ceramics?
As mentioned above, we have briefly learned that alumina ceramics have good high temperature resistance, so the specific oxidation How high temperature can aluminum ceramics withstand?
Alumina ceramics can withstand high temperatures up to thousands of degrees and high pressures. Excellent crack resistance, the best resistance to environmental stress crack resistance to environmental stress cracks for more than thousands of hours, so even in harsh environments with long-term high temperatures, alumina ceramics can be used with temperature performance and safety and confidence.
3. What is the thermal expansion coefficient of alumina ceramics
The thermal expansion coefficient refers to the change in length, area or volume of an object per unit temperature change when the temperature changes. For alumina ceramics, its thermal expansion coefficient is very small, usually below 10^-6/K. This means that when temperature changes, the alumina ceramic changes very little in size, maintaining its stability and accuracy.
The low thermal expansion coefficient of alumina ceramics is determined by its crystal structure. The crystal structure of alumina ceramics is a hexagonal closest-packed structure, in which aluminum ions are arranged in hexagonal close-packed layers, and aluminum ions fill the gaps between the hexagons. This structure makes the lattice structure of alumina ceramics change very little when the temperature changes, resulting in a very small thermal expansion coefficient.
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