The main raw materials of 99 alumina ceramics are: 99% pure alumina, its bending strength changes little at temperature, and its fracture toughness gradually increases with the decrease of temperature. The thermal conductivity of 99 alumina at low temperature is much lower than that of stainless steel. What are the properties and applications of 99 alumina ceramics?
1, 99 Alumina ceramics include positioning column, shaft rod, piston rod, bearing sleeve, ceramic seals of mating end face and other components. They are mainly used in chemical and physical conditions and are good corrosion media. These components can be used to manufacture products supported by circulating pumps, reciprocating pumps and vibrators. Generally, ceramic injection molding and ceramic grinding can be used to produce a variety of complex components with strict surface finish and flatness requirements. These components are often used in water resource management, medical, automotive, telecommunications and home appliance applications.
2, 99 Properties of alumina ceramics
99 alumina ceramics have high melting point, high hardness and high mechanical strength, and can withstand higher temperatures within 1800 ° C. Due to the increase of relatively large thermal expansion coefficient, the thermal shock stability decreases. 99 alumina ceramic is an electrical insulating material with high resistivity and good chemical stability, so the corrosion resistance of alumina is good. 99 alumina ceramic is insoluble in water, only slightly soluble in strong acid and alkaline aqueous solutions. Alumina ceramics are mature engineering ceramics, which provide excellent electrical insulation performance, high hardness and wear resistance, but relatively low strength and fracture toughness.
