Alumina ceramic is a ceramic material widely used in industry, and its output is the largest among oxide ceramics. Alumina ceramic have many excellent performance, its high mechanical strength, high hardness, high insulation resistance, corrosion resistance, wear resistance, high temperature resistance, can be used as electronic ceramics, structural ceramics, chemical and biological ceramics, widely used in textile, coal, chemical, petroleum, power and construction industries.
The commonly used forming methods of alumina ceramic include dry pressing, hot die casting and isostatic pressing, and these three forming methods have their own characteristics.
The formed product of isostatic pressing has high density, but the equipment investment is large, the raw material is wasted, the forming time is long, and lathe processing is required after forming.
Dry press can form various sizes of alumina ceramics, but the equipment investment is large, the mold wear is large, and products with complex shapes cannot be formed.
Hot die casting forming equipment is simple, cost-effective Small capital, small mold wear, easy operation, high production efficiency, less waste of raw materials, accurate product size and good finish, but the formed alumina ceramics is dense. The quality stability is not good. Before the wax blank is fired, the wax must be removed, which consumes a lot of energy and has a long construction period.
In actual production, according to the specific size of alumina insulator,select the corresponding forming method
according to the shape and density requirements. Alumina insulator with larger sizes can be formed by dry pressing or isostatic pressing.Small or complex shaped alumina ceramic can be formed by hot die casting, which is a widely used forming method in the production.