Alumina Plunger

Alumina is a commonly used precision ceramic material, and its fired crystals are the same as sapphire and ruby. It has been used in electrical components for decades due to its high electrical insulating properties. Coupled with its high strength, high corrosion resistance and high wear resistance, it has been widely used in mechanical parts.

Alumina has high temperature stability and is an excellent high temperature ceramic material. It is the most commonly used high-grade ceramic with a purity between 95-99.5%. We can supply many different types of alumina including: injection molding, compression molding, isostatic pressing, slip casting and extrusion.

Features

The surface roughness of alumina plunger can reach Ra0.2um;

Can be used in environments up to 1650°C

Hardness up to 15.7Gpa, very wear-resistant

High electrical insulation, strong corrosion resistance, high biocompatibility

Material properties

High temperature resistance: Alumina can be used in oxidizing and reducing environments below 1650°C (2900°F), and in vacuum environments up to 2000°C (3600°F).

Wear Resistance: Alumina is a very hard ceramic that is excellent in wear resistance. It is ideal for abrasive blades or products.

Electrical Insulator: Alumina is commonly used as a high temperature electrical insulator, especially the higher purity grades, which have better resistivity.

Chemical Resistance: Alumina has good resistance to strong acids and bases at high temperatures and is ideal for applications requiring resistance to corrosive substances.

Customized service capabilities

The outer diameter accuracy of cylindrical products should preferably reach ±0.002mm, generally ±0.01mm;

The inner hole precision of cylindrical products should preferably reach ±0.005mm, generally ±0.01mm;

The surface finish of the alumina plunger can reach Ra0.2um after polishing, and it is generally about Ra0.6um in the case of surface fine grinding;

The best roundness can reach 0.001mm, generally within 0.01mm;

For additional details on construction please contact us.