alumina ceramic uses

Different grades of alumina ceramic can be created through various forming and bonding processes, while their properties can also be adjusted with additives and additional components. Alumina ceramic can be formed into products of various sizes and complexity by dry pressing, isostatic pressing, tape casting and injection molding techniques. This gives manufacturers more ways to produce them.

alumina ceramic uses

High Temperature Insulation

Alumina ceramic can provide high temperature insulation due to their superior thermal, electrical and chemical properties. Their mechanical strength and hardness prevent heat or pressure damage or deformation causing easily damaged or deformed shapes.

Alumina ceramics offer excellent corrosion resistance against many harmful chemicals and acids, making them suitable for use in environments prone to corrosion. Due to these properties, as well as their long lifespan and safety standards, alumina ceramics have found widespread application across numerous sectors including electric power generation, transportation, metallurgy and more.

Alumina ceramics can be formed into various shapes through dry pressing, spray granulation, cold isostatic pressing, injection molding or casting processes. The ideal method will depend on your product and shape requirements; dry pressed products typically require the powder to have uniform distribution with loose density for mold filling purposes.

High Strength

For alumina ceramic uses, alumina ceramic is used in ballistics for creating armor that can withstand bullet impacts without inflicting injury to its wearer. Furthermore, these ceramics possess excellent electrical and thermal insulation properties.

Alumina is a fine-grained technical grade material available in various purities and additives. Pure alumina can be found in applications that require plasma and chemical resistance such as semiconductor and nuclear grade insulators.

Alumina can be produced using dry pressing, isostatic pressing, injection molding or slip casting methods. Due to its excellent abrasion resistance it makes an excellent insulator or seal material in contact with corrosive chemicals such as hydrofluoric acid or molten alkalis; in these ways alumina’s chemical inertness makes it suitable for many different uses.

High Resistance to Corrosion

Alumina ceramics are highly resistant to chemical corrosion. Their resistance against acid and alkali corrosion results from their high purity, microstructure and ambient temperature; however, their level of corrosion resistance depends on both aggressive media concentrations as well as impurities within its ceramic grain boundaries.

Response surface methodology can be used to optimize the corrosion resistance of alumina ceramics by measuring concentration of eluted ions and sample density under various corrosion conditions and selecting optimal parameters for materials.

Alumina ceramics are non-conductive and corrosion-resistant, making them the ideal material for protecting vital circuits in high voltage applications. Their low expansion coefficient also enables them to keep their shape when temperatures fluctuate, making alumina ceramics ideal for high voltage protection applications.

High Hardness

Alumina ceramic features high tensile strength and the ability to withstand impacts and stresses, making them useful components in mechanical and electrical components requiring protection from physical impacts as well as chemical corrosion resistance.

High-purity aluminas are used for high-temperature electrical insulation and can be formed into substrates, spark plugs, insulators and circuit shells. Furthermore, these materials make ideal laser components, electro optical devices, flow measurement sensors and X-ray equipment components.

Alumina hydrate is washed, filtered and calcined to produce green alumina ceramic powder. As part of the manufacturing process, additives like polyvinyl alcohol, methyl cellulose and alginate amine may be added for enhanced fluidity, loose density, low flow angle friction temperature and optimal particle gradation ratio that makes for ideal product formation through dry pressing, extrusion injection press or hot or cold isostatic press processes.

High Wear Resistance

Alumina ceramic provides superior wear resistance in comparison to hard metals, making them suitable for many different applications. Due to this feature, alumina ceramics often outlast other materials and should last much longer, thus saving on maintenance costs and downtime costs.

Alumina wear-resistant ceramics for ceramic lining have the capability of withstanding high loads, temperatures and corrosion; making them suitable for applications including chute linings, coal/cement grinding systems, chemical processing plants and ore crushing treatment systems.

Dry pressing uniform alumina powder granular is of critical importance in cold isostatic press (CIP), as this ensures accurate dimensional accuracy control for manufactured alumina ceramic products/parts. An optimal particle size for CIP should be approximately 3mm to inhibit grain growth rate and enhance wear resistance of products produced through it.

Low Friction

Alumina ceramics feature self-lubricating properties that help minimize friction and wear, making them suitable for parts that experience prolonged, heavy use in demanding environments.

High-frequency applications such as television and satellite transmitter tubes require pure and dense alumina ceramics with superior insulation, dielectric, thermal shock resistance and chemical inertness to withstand their frequencies of operation. Furthermore, radiation exposure will have no detrimental effect on this ceramic material.

High Precision

Alumina ceramic offers exceptional medical-grade properties and are commonly used to manufacture artificial bones and joints. Their low porosity also ensures superior biocompatibility, biological inertness, physical and chemical stability as well as wear resistance – essential qualities in artificial bone replacement systems.

Once alumina has been sprayed into powder form, it can be formed through dry pressing, injection molding, die casting or hot isostatic pressing. Of these processes, injection molding is typically the most popular. For each ceramic part that requires injection molding to form it requires custom tools being designed and manufactured followed by sintering and de-binding to produce its final component.

Alumina ceramics can be broken down into ordinary porcelain, 95 porcelain, 94 porcelain and 90 porcelain depending on their Al2O3 content, as well as an 80% or 75% Alumina Ceramic Series which may or may not contain Al2O3. They find use across industries including aerospace, electronics, automobiles, petroleum, electricity metallurgy and chemicals.

alumina ceramic uses