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Further processing options

Functional coatings

Through various coatings, ceramic components and systems can be optimised for their intended use and their functionality extended.

An employee dressed for the clean room inspects a rectangular coated ceramic component.

Special coatings on technical ceramics open up completely new application possibilities: Special requirements are realised, for example by applying metallic layers. Bosch Ceramics is continuously developing this higher functionalisation of ceramics. Ceramic components from Bosch Ceramics are therefore precisely adapted to their environment and their technical tasks.

Advanced Ceramics

Better and more

Durable coatings to extend functionality

Coatings on technical ceramics can have different objectives: Either the existing properties are improved, for example by applying friction-reducing layers, or entirely new properties are added. For example, ceramics – actually an insulating material – can be made conductive at certain points by applying metallic layers. These layers are permanently bonded to the ceramic base material by sintering. The ceramic can thus be used for completely new applications.

Wide range of coating materials and technologies

Depending on the materials used, the coating can be sintered together with the component at high temperatures (co-firing); or the coating is applied to the already sintered component. Then sintering must be carried out again at lower temperatures (post-firing). Co-firing achieves better layer adhesion, but cannot be used with all materials. Bosch Ceramics has already realised many coatings, for example with gold, silver, platinum, chrome but also hard materials such as DLC. The wide range of coating technologies ensures an extensive choice of materials here.

Our processes for functional coatings

In-mold labelling

With In-mold labeling, a film with printed coatings is placed in an injection molding tool and then encapsulated with ceramic material. The film is removed in the subsequent processes, while the functional coating is permanently bonded to the ceramic.

Tampography

With this process, coatings can be applied using a flexible silicone die to non-planar ceramic components, such as curved surfaces.

Screen printing

With screen printing, metallic pastes can be applied with great precision to flat components. For electronics, this means producing multi-layer circuits with ceramic carrier plates (LTCC technology).

CVD

With chemical vapor deposition, highly complex parts can be refined with precise layers on a three-dimensional level. Advanced Ceramics works sustainably using unique processing techniques to avoid the formation of harmful hexavalent chromium.

PVD

The technically demanding process of physical vapor deposition achieves excellent layer adhesion, producing thin, compact coatings in a wide variety of materials.

Application examples

Fits exactly

Contact holder for automotive applications

High electrical insulation even under harsh conditions

Industry: Automotive engineering

Production process: Ceramic injection moulding (CIM)


Dimensions: 7x10mm

Wall thickness: up to 0.5mm

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