Technical Ceramic

Advanced ceramic materials engineered for demanding industrial applications requiring extreme hardness, wear resistance, chemical inertness, and/or high-temperature stability. Major types: alumina (Al₂O₃, 85-99.9% purity, hardness 1,500-1,800 HV, for wear parts, insulators, and conveyor components), zirconia (ZrO₂, highest toughness among ceramics, 1,200 HV, for cutting tools and pump components), silicon carbide (SiC, hardness 2,500 HV, for seal faces, kiln furniture, and abrasion-resistant linings), silicon nitride (Si₃N₄, best thermal shock resistance, for bearings, turbocharger rotors, and cutting inserts). Properties: zero corrosion in most chemicals, electrical insulation (except SiC), temperature capability to 1,200-1,800°C. Limitations: brittle (low fracture toughness), expensive to machine (diamond grinding required). Per ISO 14705 (mechanical properties testing). Applications: conveyor wear tiles, pump seals, bearing balls, cutting inserts, spark plug insulators, and mining cyclone linings. Brands: Kyocera, CoorsTek, Morgan Advanced Materials.

What you need to know

Advanced ceramic materials engineered for demanding industrial applications requiring extreme hardness, wear resistance, chemical inertness, and/or high-temperature stability.

Major types: alumina (Al₂O₃, 85-99.9% purity, hardness 1,500-1,800 HV, for wear parts, insulators, and conveyor components), zirconia (ZrO₂, highest toughness among ceramics, 1,200 HV, for cutting tools and pump components), silicon carbide (SiC, hardness 2,500 HV, for seal faces, kiln furniture, and abrasion-resistant linings), silicon nitride (Si₃N₄, best thermal shock resistance, for bearings, turbocharger rotors, and cutting inserts).

Properties: zero corrosion in most chemicals, electrical insulation (except SiC), temperature capability to 1,200-1,800°C.

Limitations: brittle (low fracture toughness), expensive to machine (diamond grinding required).

Per ISO 14705 (mechanical properties testing).

Full definition

Technical ceramics, also known as advanced ceramics, are engineered materials designed to meet the rigorous demands of various industrial applications. These materials showcase exceptional properties such as extreme hardness, wear resistance, chemical inertness, and high-temperature stability, making them suitable for a wide range of applications across industries. The major types of technical ceramics include alumina (Al₂O₃), zirconia (ZrO₂), silicon carbide (SiC), and silicon nitride (Si₃N₄), each with distinct characteristics that cater to specific needs. Alumina, with a purity range of 85-99.9%, exhibits a hardness between 1,500 and 1,800 HV, making it ideal for wear parts, insulators, and conveyor components. Zirconia stands out for its toughness, with a hardness of around 1,200 HV, and is used in cutting tools and pump components. Silicon carbide is known for its remarkable hardness of approximately 2,500 HV, suitable for applications requiring high wear resistance, such as seal faces and kiln furniture. Lastly, silicon nitride offers the best thermal shock resistance among technical ceramics, finding application in bearings, turbocharger rotors, and cutting inserts.

Despite their advantageous properties, technical ceramics also present certain limitations. They are inherently brittle, which leads to low fracture toughness, a significant consideration in applications where mechanical stress is a factor. Additionally, the machining of these materials can be expensive due to the requirement for diamond grinding, adding to the overall cost of production. The performance of technical ceramics is quantitatively assessed according to standards such as ISO 14705, which outlines testing methods for mechanical properties. As industries continue to advance, the demand for these specialized materials is likely to grow, particularly in sectors such as aerospace, automotive, and energy, where performance and reliability are paramount.

What you need to know

What you need to know: Technical ceramics possess extreme hardness and wear resistance, with silicon carbide reaching up to 2,500 HV.

Alumina ceramics can achieve 85-99.9% purity, making them suitable for wear parts and insulators, with hardness ranging from 1,500 to 1,800 HV.

Zirconia ceramics provide the highest toughness among ceramics, with a hardness of around 1,200 HV, used in cutting tools and pump components.

Silicon nitride exhibits the best thermal shock resistance, making it ideal for applications like bearings and turbocharger rotors.

These materials are often brittle, leading to low fracture toughness, and require expensive diamond grinding for machining.

Industrial applications

1Used in conveyor wear tiles for enhanced durability in material handling.

2Applied in pump seals to ensure reliability and longevity in fluid transfer systems.

3Utilized as bearing balls due to their low friction and wear characteristics.

4Implemented in cutting inserts for high-performance machining applications.

5Adopted in spark plug insulators for effective electrical insulation in automotive engines.

Common mistakes

✕Underestimating the brittleness of technical ceramics, leading to premature failure in high-stress applications.

✕Neglecting the need for diamond grinding, resulting in poor surface finishes and reduced performance.

✕Failing to consider the chemical compatibility of technical ceramics with the intended environment, risking material degradation.

Technical Ceramic

What you need to know

Full definition

What you need to know

Industrial applications

Common mistakes

Pro tip

Technical standards

Suppliers of industrial materials in Mexico

Applicable standards