Matters needing attention when processing alumina ceramics

Alumina ceramic materials generally have fairly large elastic modulus, high hardness, high brittleness, and strong crack sensitivity. Therefore, alumina ceramics have certain processing difficulties. What should be paid attention to during the processing.


Alumina ceramic materials have high hardness, high strength, low expansion coefficient, insulation, wear resistance, and corrosion resistance. They are widely used in machinery manufacturing, aerospace, precision instruments, petrochemicals and other fields. Alumina ceramic parts are usually formed by hot pressing and sintering. Since sintering often brings deformation and shrinkage, further finishing is generally required to ensure the dimensional accuracy and shape accuracy of the parts.


Points to note when processing alumina ceramics


Pay attention to the tendency to collapse when processing alumina ceramics

The separation of the cut part and the machined surface of the material is caused by tensile failure, which is not the result of normal cutting.


The cracks caused by chipping and cutting deformation generally crack down along the surface of the workpiece. At this time, due to the cutting tensile stress, the cutting and the bonded workpiece matrix will peel off together to form a cracking phenomenon. It should be noted that the greater the tensile stress, the more serious the collapse phenomenon, which may lead to the waste of the entire workpiece.


Common alumina ceramic processing methods

Alumina ceramic material is a difficult-to-process material with high hardness and high brittleness. Common processing methods include grinding, cutting, laser heating, high-pressure abrasive water jet processing, and ultrasonic processing.


There are two types of lasers commonly used in ceramic processing: lasers and lasers. The effective power of carbon dioxide lasers is relatively high and the pulse time is relatively long, and they are generally used for high-speed processing. However, because ceramics have a high efficiency in absorbing carbon dioxide lasers and a large spot range on the ceramic surface, the ceramic workpiece has a large heating area, which makes the ceramic surface prone to brittle damage; the effective power of the laser is low and the pulse time is short. The energy density of its laser beam is high, so it is often used to process ceramic parts.


Alumina ceramic rods processed by alumina ceramics play an important role in industrial equipment. The use of alumina ceramic rods processed by alumina ceramics can make industrial equipment use better, improve the performance of industrial equipment, and make it more outstanding. Because the ceramic rod formed by alumina ceramic processing is a kind of wear-resistant product, it is resistant to deformation and damage due to the addition of alumina components. 


So how do we judge the quality of the ceramic rod after alumina ceramic processing?


Try to see if it can withstand high temperatures. This is an intuitive and simple way to judge its quality, and it has a certain scientific basis.


At the same time, if you want to have a deep understanding of the quality of the ceramic rods processed by alumina ceramics, you may wish to judge its chemical resistance through salt spray tests, etc., because professional alumina ceramic rods are extremely chemically resistant and have super chemical resistance. Stability, even in extremely harsh environments, its chemical properties will not be destroyed, so it is a high-quality product.


After the alumina ceramic is processed, the first performance of the ceramic rod is the increase in hardness, so you only need to observe whether its hardness is up to the standard when purchasing. You can see whether the abrasion resistance of the alumina ceramic processing part is intact, and it can also be used. Professional tools to test its thermal conductivity require low thermal conductivity, and excellent ceramic rods have strong wear resistance and stability.


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The main products of Mingxing Ceramic include ceramic seal ring, ceramic shaft, alumina ceramic rod and discs, steatite ceramic insulator, etc. 

 

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