In order to improve the accuracy of the product, most alumina ceramic materials need further finishing treatment after completing the sintering process to achieve a higher surface finish. But alumina ceramics is not an ordinary material after all. How can its finishing treatment be better accomplished?
Since alumina ceramic materials have relatively good hardness, they need to be finished with harder grinding and polishing tile materials, such as SIC, B4C or diamond, etc.; and in precision processing During the processing, the lubricity of the surface of the alumina ceramic material must be improved in advance.
In terms of finishing of alumina ceramic materials, the more commonly used method is to grind step by step from coarse to fine abrasives, and then perform surface polishing. When polishing, you can choose to use less than 1μm Micron Al203 powder or diamond paste is used for grinding and polishing. Of course, laser processing and ultrasonic processing can also achieve the purpose of grinding and polishing alumina ceramics.
The above is a finishing process to improve the surface finish of alumina ceramic materials, and then to enhance the mechanical strength of alumina ceramics, which is alumina ceramic strengthening technology . In fact, advanced processes such as electron beam vacuum coating, sputtering vacuum coating or chemical vapor evaporation are used on the surface of alumina ceramics to temper the alumina ceramics.
These methods can coat a layer of silicon compound film on the surface of alumina ceramics. It only needs to be heated at a temperature of 1200℃~1580℃ to temper the alumina ceramics. . Facts have proved that the mechanical strength of strengthened alumina ceramics can be greatly increased on the original basis, achieving uniqueUltra-high-strength alumina ceramic
