Materials

Ceramic materials

Ceramic materials are inorganic materials, mainly manufactured from natural raw materials. The major components of polyphase materials are clay, kaolin, feldspar and soapstone. Additionally are used components as alumina and zircon to achieve special properties e.g. high strength.

We manufacture a wide palette of various materials, among them also highly-specialized ceramic materials with excellent mechanical, electrical and thermical properties. As for the quantities, we are at our strongest at group of silicate ceramics, including: porcelain, steatite, cordierite and mullite materials.

We also manufacture other type of ceramic materials, such as alumina oxide, silicon carbide, quartz and fireproof materials.
Our technical ceramics refers to products for electrical engineering applications, electronics, automotive industry, household appliances, process engineering, high temperature applications and mechanical processes.

Our ceramic materials are classified into groups and meets to standard IEC 60 672.

Porcelain

Porcelain materials are alumina silicate materials, which are classified according standard IEC 60 672 in group C 100 – alkaline alumina-silicate porcelains. Porcelain has excellent insulation properties, even at high temperature range, it is basically used in electro technical applications.

Typical characteristics:

•  high mechanical strength
• excellent electrical insulation properties
• good resistance to chemicals
• high dielectric strength
• corrosion resistant
• chemical inertness

ETI manufacture following porcelains:

• C110: quartz porcelain, shaped with extrusion and slip casting technology
• C111: quartz porcelain, shaped with wet pressing technology
• C 120: alumina porcelain, with high mechanical strength, shaped with extrusion and slip casting technology
• C 130: : high alumina porcelain, with high mechanical strength, shaped with extrusion and slip casting technology.

Steatite

Steatite is a ceramic material based on natural raw materials and it consist mainly by soapstone. According to standard IEC 60 672 it is classified in group C – 200 – magnesium silicates. It is mainly used as insulating material for electric engineering. Regarding to specific usage demands, the composition could be modified with zirconium addition.

Typical characteristics:

• high mechanical strength
• low dielectric loss factor in high frequency range
• high dielectric strength at room and high temperatures

ETI manufacture following steatites:

• C 220: alkaline steatite, shaped with dry pressing and extrusion technology
• C 221: non alkaline steatite, shaped with dry pressing, extrusion and injection moulding technology
• C 230: porous steatite, shaped with dry pressing and extrusion technology. Typical properties are: high porosity, low thermal conductivity and high electric resistance at high temperatures

Cordierite

Cordierite materials are insulating materials, according to standard IEC 60 672 classified in group C 400 – alkaline earth alumina silicates and C 500 – porous alumina silicates.

Typical characteristics:

• high thermal shock resistance
• high temperature resistance
• low coefficient of thermal expansion
• high specific resistance at high temperatures

ETI manufacture following cordierites:

• C 410: nonporous cordierite material, shaped with dry pressing and extrusion technology
• C 510: porous cordierite material, shaped with slip casting
• C 520: porous cordierite material, shaped with dry pressing, extrusion and slip casting
• C 530: porous cordierite for higher temperature applications, shaped with dry pressing, extrusion and slip casting

Mullite ceramics

Mullite ceramics is insulating material, according to standard IEC 60 672 classified in group C 610 – materials based on alumina-silicates (mullite ceramics).

Typical characteristics:

• high mechanical strength
• good electrical insulation properties
• corrosion resistant
• chemical inertness

ETI manufacture following mullites:

• C 610: : alumina porcelain, with high mechanical strength, shaped with extrusion and dry pressing technology.

Al₂O₃ ceramics

Alumina oxide (Al2O3) is one of the most important technical oxide ceramic materials. It has wide range of applications. According to standard IEC 60 672 it is classified in group C 700 – high-alumina ceramics.

Typical characteristics:

• high mechanical strength and hardness
• high thermal conductivity
• good electrical insulation at high temperatures
• corrosion resistance

ETI manufacture following alumina oxide materials:

• C 786: 86 – 95% Al2O3, shaped with extrusion and dry pressing
• C 795: 95 – 99% Al2O3, shaped with extrusion, dry pressing, slip casting and injection moulding
• C 799: > 99% Al2O3, shaped with extrusion and dry pressing technology