In the specific composition of the valve, the first method is to set a layer of ceramic protective film on the metal surface by a ceramic inlay or bonding and use metal as the supporting skeleton system of the ceramic.
The advantages are: that the skeleton of the metal part has strong hardness and ductility, which can effectively overcome the characteristics of high brittleness but low strength of ceramics, and can also play the role of ceramic protection.
The second type is mainly based on the overall solid ceramic structure, which is processed by multi-layer processes, such as static pressing, hot pressing sintering, etc., to avoid the technical and technological difficulties caused by the limitations of ceramic valves to the greatest extent.
In the application process of ceramics, the connection method of the valve needs to be selected according to the properties of the ceramics. For example, when designing and manufacturing ceramic ball valves and ceramic butterfly valves, due to the special structure of butterfly valves and ball valves, it is not appropriate to consider the method of inlay or bonding, and the main chemical composition of ball valves and butterfly valve ceramics is ZrO2, and the firing and processing process of ceramics is also different from Al2O3 ceramics.
Ceramic valves use structural ceramic materials with excellent performance, which gives them incomparable advantages over ordinary metal or plastic valves. Made of 99.5% high-purity alumina ceramics, the valves are guaranteed to have excellent performance under various working conditions.
1. Corrosion resistance 99.5% alumina structural ceramics are very chemically inert, do not react with most organic and inorganic substances, and will not pollute the medium. For most acids and alkalis, the physical and chemical properties of alumina structural ceramics are very stable, and the performance will not degrade even after many years of service.
2. Wear resistance 99.5% alumina ceramics are 43% harder than zirconium oxide, 140% harder than daily ceramics, and 730% harder than stainless steel, reaching HRA88, which is only slightly lower than diamond, silicon nitride, and silicon carbide. This characteristic also determines that ceramic valves have very good wear resistance.
Edgetech can provide a variety of advanced ceramic precision machined parts such as tubes, washers, insulators, rods, flanges, and other high-strength ceramic parts to meet customers’ customized requirements.