Ceramic bolt

Ceramic screws can choose screw products made of zirconia, alumina, silicon nitride and other materials, which have more stable physical stability and chemical stability. The physical stability is mainly manifested in high and low temperature resistance, insulation, antimagnetic, wear resistance Etc .; the main surface of chemical stability is corrosion resistance and oxidation resistance. But because it is a hard and brittle material, although its mechanical properties can not be compared with metal materials at present. Of course, with the advancement of material technology and the improvement of product structure, this gap is gradually narrowing.
Physical stability of ceramic screws
High and low temperature characteristics
Under high temperature environment (800 degrees Celsius), no deformation and extension will occur, and the connection strength will not be reduced. Can be maintained at a temperature of minus 70 degrees
Good connection strength.
Insulation characteristics:
Zirconia ceramic screws can maintain good insulation at room temperature. The resistivity at room temperature is 10, and it can be changed from an insulator to a conductor when heated in air to a certain temperature range (above 800 degrees).
Antimagnetic characteristics
Both zirconia screws and alumina screws are antimagnetic under normal conditions.
Wear resistance
Its ultra-high hardness (Mohs 9 grade) can maintain its original shape under continuous friction, and is not consumed by wear, and the shape does not change.
Chemical stability of ceramic screws
Corrosion resistance
Zirconia ceramics do not chemically react with strong acids and bases. In the high-temperature (over 200 degrees) water vapor environment, aging will occur.
Antioxidant properties
Zirconia ceramics have good characteristics such as oxygen-impermeable gases and liquid metals such as iron and steel. They are commonly used in high-temperature fuel cells, gas oxygen probes and metal liquid oxygen probes.
Application range of ceramic screws:
Ceramic screws have excellent characteristics such as high temperature resistance, insulation, non-magnetic, corrosion resistance, environmental protection, beautiful appearance, and never rust. Not only can they be comparable to traditional plastic screws and metal screws, but in recent years, the performance of ceramic screws has been continuously improved and applied. The field is getting wider and wider, and in some fields, it has continuously replaced and replaced the traditional screw!
1) Aerospace industry (insulation, anti-interference device on electronic equipment)
2) Electronics industry (insulation, anti-interference, light weight)
3) Medical device industry (insulation, non-magnetic, environmental protection, anti-interference number, make the use of medical machinery and equipment safer)
4) Petrochemical industry (high temperature resistance, chemical resistance, corrosion resistance, extended equipment life)
5) Communication industry (insulation, non-magnetic, safety)
6) Marine industry (acid resistance, alkali resistance, corrosion resistance, extended service life), etc.
Performance and application comparison of ceramic screws, metal screws and plastic screws
Ceramic screws: The advantages of ceramic screws are high temperature resistance, wear resistance, insulation, anti-magnetic, and corrosion resistance. The mechanical properties are lower than metal screws.
Metal screws: The advantages of metal screws are strong tensile strength and fracture toughness, poor high-temperature bearing capacity, and no insulation. Some metal screws have certain corrosion resistance.
Plastic screws: The advantages of plastic screws are insulation, anti-magnetic, and special plastic screws have corrosion resistance. It is easier to wear and is not suitable for needs
Strong connection environment.
Classification of ceramic screws:
According to the material: Zirconia ceramic screws, alumina ceramic screws, silicon nitride ceramic screws
According to the shape of the head: inner hexagon head ceramic screws, hexagon head ceramic screws, pan head ceramic screws, flat / counter head ceramic screws, etc.
Divided by slot shape: cross, straight (slotted), hexagon, rice, plum, etc.