Zirconia ceramics is a new type of high-tech ceramics, which in addition to high strength, hardness, high temperature resistance, acid and alkali corrosion resistance and high chemical stability conditions of precision ceramics, but also has higher toughness than ordinary ceramics
ZrO2 ceramic can be used in various industries, such as shaft sleeve, bearings, cutting components, molds, automotive parts, and even the human body. In the field of consumer electronics, zirconia ceramics because of its hardness close to sapphire, but the total cost is less than 1/4 of sapphire, its bending rate is higher than glass and sapphire, non-conductive, will not shield the signal, so it is favored by fingerprint recognition module patch and mobile phone back cover.
Zirconia ceramic ring is a kind of inorganic non-metallic mechanical part made by sintering at high temperature, which has the advantages of high temperature resistance, corrosion resistance, wear resistance and thermal shock resistance. In recent years, with the progress of ceramic toughening and strengthening technology and the development of machining methods, the application range of zirconia ceramic rings has expanded rapidly. Among the processing methods, the mechanical processing method has high efficiency, so it is widely used in industry, especially the diamond grinding wheel, grinding and polishing is more common.
Processing Difficulties
1, the thickness of the ceramic ring is small, and it is easy to crack and collapse during the processing because of the grinding force of the grinding equipment, which affects the qualified rate of the zirconia ceramic ring product.
2, the zirconia material itself. Because zirconia ceramics in different temperature environments, the structure of the material itself will change, so we must do a good job in the grinding process to avoid temperature caused by material changes, resulting in polishing results are not perfect.
The Solution
1, coarse grinding before the initial screening of the material, mainly the eye visible problem material screening out, such as the color does not contain impurities of the material. Avoid unnecessary loss due to material problems. 2, grinding and polishing process, we use coarse throwing, semi-finishing, finishing process, the use of appropriate copper or iron plate, and ceramic plate as polishing paper, the use of ceramic mirror polishing machine for processing.
3, according to the thin characteristics of the ceramic ring itself, specially targeted testing, using a new fixing method, testing the critical point between the compression method and the fixing method, so that the zirconia ceramic ring workpiece and the grinding disk to achieve the ideal fit state.
To sum up, zirconia ceramics with its excellent physical and chemical properties, in many industrial fields and consumer electronics has shown a wide range of application prospects. Although there are some difficulties in the processing process, the qualified rate and polishing quality of zirconia ceramic rings can be effectively improved through reasonable material screening, fine grinding and polishing process and innovative fixing methods. With the continuous progress of technology, the application range of zirconia ceramics will be further expanded, providing strong support for the development of more fields.
