The main raw material of 99 alumina ceramics is :99% content of purity alumina, the temperature change of its bending strength is small, the fracture toughness gradually rises with the decline of temperature, the thermal conductivity of 99 alumina at low temperature is much lower than stainless steel, so the properties of 99 alumina ceramics and its application 

一，99 %alumina ceramic consists of positioning column shaft rod, piston rod, bearing sleeve and mating end face ceramic seals and other components, they are mainly used in chemical and physical conditions, is good corrosion medium, these components can be used to manufacture cycle pump, reciprocating pump and resonator supported products Ceramic injection molding and ceramic grinding processes are commonly used to produce a wide variety of complex components with stringent surface finish and flatness requirements, which are commonly used in water management, medical, automotive, telecommunications and home appliance applications

二，99% alumina ceramic properties

99 %alumina ceramics have a very high melting point, high hardness and high mechanical strength, the use of higher withstand temperature of 1800 C, due to the relatively large thermal expansion coefficient increase, so the thermal shock stability decreased  99 % alumina ceramics is a kind of electrical insulating material, with high resistivity, it also has good chemical stability, so the corrosion resistance of alumina is good,99 %alumina ceramics is insoluble in water, only slightly soluble in strong acid and alkaline aqueous solution 99% alumina ceramics are mature engineering ceramics that provide excellent electrical insulation properties, high hardness and wear resistance but relatively low strength and fracture toughness.