Characteristics and processing precautions of alumina (Al2O3) ceramic plates

Release time：2024-09-11click：0

Alumina is also called: aluminum oxide (chemical formula: Al2O3). Alumina ceramic plate is a ceramic material based on aluminum oxide (Al2O3) and is used for thick film integrated circuits.

Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic cleaning is required. Alumina ceramic plate is a widely used ceramic. Because of its superior properties, its applications in modern industrial society have become more and more extensive, meeting various needs for daily use and special properties.

Alumina ceramic platesGenerally, the elastic modulus is quite large, the hardness is high, the brittleness is high, and cracks It is highly sensitive. Therefore, its machining difficulty is mainly reflected in its processing hardness and processing brittleness. Usually, the microstructure of alumina ceramics is equiaxed grains, which is a polycrystalline structure composed of ionic bonds or covalent bonds. Therefore, the fracture toughness is low under the action of external load. Stress will cause fine cracks on the surface of the ceramic, and the cracks will expand rapidly and cause brittle fracture. Therefore, during the processing and cutting of alumina ceramic plates, chipping often occurs, that is, small cracks appear on the surface of the ceramic.

The brittleness of alumina ceramic plate processing: Usually, the microstructure of alumina ceramics is equiaxed grains, which are polycrystalline composed of ionic bonds or covalent bonds. structure and therefore has lower fracture toughness under external loads. Stress will cause fine cracks on the surface of the ceramic, and the cracks will expand rapidly and cause brittle fracture. Therefore, during the processing and cutting of alumina ceramic plates, chipping often occurs, that is, small cracks appear on the surface of the ceramic.

Processing reasons for chipping of alumina ceramic plates:
(1) The final separation of the removed part of the ceramic plate from the machined surface is caused by tensile failure, which is not the result of normal cutting.
(2) Cracks caused by chipping cutting deformation generally crack along the surface of the workpiece downward. At this time, due to the cutting tensile stress, the cutting and bonded workpiece matrix will peel off together, forming a chipping phenomenon.

Mingrui Ceramics has more than 30,000 square meters of factory buildings, rich processing experience and advanced equipment. It provides alumina ceramic plates to users, including drilling, cutting, carving and polishing. , Tapping and other processing. Non-standard customization, drawings and samples are welcome!

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