Werkstoffe technische Keramik

CERAMIC MATERIALS - TECHNICAL CERAMICS

 

TECHNICAL CERAMIC MATERIALS

The term ceramic has evolved historically due to the variety of raw materials and applications. Ceramics today means many different materials.
Ceramic materials belong to the group of non-metallic-inorganic materials, which also includes glasses and binders with fillers such as cement, lime and gypsum. These three groups of materials differ in the way they are manufactured. Ceramic materials are formed from a raw mass at room temperature and receive their typical properties through a sintering process. Ceramics are therefore sintered materials. Glasses are made from a melt and are to be understood as supercooled liquids. Binders with fillers harden hydraulically through crystallization with water.
Ceramic materials can be classified according to various criteria. The most important criterion is the chemical composition.
 
Oxide and non-oxide ceramics, as well as certain types of silicate ceramics, are mainly used for technical purposes. The term technical ceramics is often used simply to refer to the technical use of the materials.
According to the areas of application, ceramic materials can be divided into functional ceramics (e.g. tableware ceramics), structural ceramics and technical ceramics.
Another classification criterion is the grain size. A distinction is then made between coarse and fine ceramics. Ceramics for technical applications belong to the group of fine ceramics.
 
We mainly deal with fine ceramics as technical ceramics.
Technical ceramics have a wide range of uses in industry, so it is very difficult for a developer or designer to devote himself to this topic.
We are always at your disposal for your projects or ceramic questions.

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Aluminum oxide is the most commonly used ceramic material. Thanks to its very good electrical insulation, dielectric strength and high temperature resistance up to 1750°C, it is ideal for electrical applications and high-temperature applications.

THE ADVANTAGES OF ALUMINUM OXIDE CERAMIC

  • High strength

  • High hardness

  • Good temperature resistance

  • High wear resistance

  • High corrosion resistance up to high temperature ranges

  • High biocompatibility 

  • Excellent tribological properties

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Zirconium oxide is the high-performance material among the oxide ceramics. It features exceptional fracture toughness, high wear and corrosion resistance, and low thermal conductivity.

THE ADVANTAGES OF ZIRCONIA CERAMIC

  • Very high fracture toughness

  • Very high bending and tensile strength

  • High wear resistance

  • High compressive strength

  • Very low thermal conductivity

  • Thermal expansion similar to cast iron

  • Modulus of elasticity comparable to steel

  • oxygen ion conductivity

  • Very good tribological properties

  • Excellent surface finish and sharp edges possible

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The optimal properties of both materials are realized in our mixed oxide ceramics .

 

-Main component ZrO2 is called ATZ (Alumina Toughened Zirconia)

-Main component Al2O3 hot ZTA (Zirconia Toughened Alumina) 

THE ADVANTAGES OF MIXED OXIDE CERAMICS

The background of the mixtures is to combine the "good" properties of both oxides:

The great strength and toughness of zirconia with the hardness and wear resistance of alumina.

With a suitable proportion of ZrO2  in the ZTA material, the high electrical insulation of the Al2O3  is retained.

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Light and yet extremely stable – that is what characterizes silicon carbide. Also known as silicon carbide or silicon carbide, the ceramic material shows excellent properties for a wide variety of applications. Silicon carbide components are ideal for applications in which wear resistance, high rigidity, corrosion resistance and temperature resistance are of essential importance.

THE BENEFITS OF SILICON CARBIDE

  • Outstanding chemical resistance

  • High strength

  • Excellent corrosion resistance even at very high application temperatures

  • Excellent high temperature mechanical properties

  • Good thermal shock resistance

  • Low thermal expansion

  • Very high thermal conductivity

  • High wear resistance

  • Very high rigidity

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The ceramic material silicon nitride (also: silicon nitride) is the all-round talent among technical ceramics. With its high strength and fracture toughness, very good thermal shock resistance and its excellent wear and impact resistance, silicon nitride is suitable for a wide variety of applications.

THE ADVANTAGES OF SILICON NITRIDE CERAMIC

  • Very good strength up to high temperature ranges (>1200°C)

  • Excellent wear and impact resistance

  • High hardness

  • fracture toughness

  • Low thermal expansion

  • Relatively low thermal conductivity

  • Very good thermal shock resistance

  • Very good chemical resistance

  • Electrically conductive material available

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It combines the performance of a technical ceramic with the versatility of a high-performance plastic - making it an excellent machinable material. Even the most demanding fittings and the smallest precision parts can be manufactured by turning and milling. When the performance of a technical ceramic is required and the application requires the manufacture of a requires a complicated shape, Macor® glass ceramic is the ideal material. It helps to significantly reduce the time between development and deployment, thereby reducing the cost.

THE ADVANTAGES OF MACOR® / GLASS-CERAMIC

  • Cost effective to process

  • Most complex shapes possible

  • Radiation Resistant

  • Low thermal conductivity

  • Very high service temperature

  • Good electrical insulator

  • No porosity and no outgassing

  • Short throughput times

  • No glaze firing required

If you would like to send us your request or have general questions, please do not hesitate to let us know when you call or to send us an email.

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