Joining Technology

Group

Thermozyklisierung von Modellfügungen aus SOFC-Stahl und Glaslot
© Fraunhofer IKTS

Thermal cycability of model sealings (SOFC-steel and glass solder)

Abguss einer Glassschmelze

Fritting of a glass melt

Glaslotfolie mit ausgestanzten Fügeteilen

Solder glass tapes and stamped pieces ready for application

Glasses and ceramic interconnect technologies

 

In various fields of civil engineering, energy technology and electronics high temperature stable, hermetic and corrosion resistant ceramic-to-ceramic and ceramic-to-metal joints are needed. Appropriate materials which are able to match the boundary conditions of these requirements are glass-ceramic materials, active brazes or reactive air brazes. The Fraunhofer IKTS develops brazing and soldering materials as well as brazing technologies for high temperature applications such as solid oxide fuel cells (SOFC), sensor components, ceramic reactors and thermoelectric. These joints must show appropriate electric and thermal conducting or insulating properties and must also have to withstand mechanical stresses. Corrosion and degradation phenomena of brazes and solder materials with aggressive environments and the materials often limit the lifetime of the joint components and therefore also the lifetime of complex devices. Due to a detailed knowledge of degradation processes and failure mechanisms the solder materials and brazes can be adopted for the aspired applications.

 

Services offered

 

  • Development and preparation of solder glasses, -elements from tapes as metallic brazing pastes 
  • Development and adaption of brazing pastes for joining and sealing of ceramics and metals 
  • Development and characterisation of Glasses for joining and sealing applications 
  • Analysis of corrosion and degradation behaviour of solder glasses, active brazes and joints 
  • Design support for ceramic and metallic components for assembling in joint devices 
  • Consulting and material analysis

fuegetechnausdehn

 

Special technical Equipment

 

  • Complete technology chain for manufacturing and characterization of solder glasses, active brazes and reactive air brazes as well as composites as pastes or tapes with focus on high temperature applications (SOFC, SOEC, ceramic membranes) 
  • Test sites for characterization of lifetime and thermal cyclisation of joints at temperatures up 1000°C charged by electrical potentials in variable dual atmospheres 
  • Devices for the brazing and soldering in vacuum and protective gas furnaces as well as by inductive heating 
  • Equipment for an accompied process control according to a certified quality management system (ISO9001:2008)

Current research

Materials and process development for LATP-based all-solid-state batteries

Current research

Interconnect technologies for ceramic-based sensors

Current research

New materials for lithium-ion-conducting solid-state electrolytes

Topic

Sealing glasses for SOFC

Topic

Brazes for SOFC and ceramic permeation membranes

Topic

Glasses for AlN compatible paste systems

Topic

Glasses for thick film pastes for PV

Topic

Glass-ceramic sealing glasses for HTCC-multi layer components (Al2O3, ZrO2)

Topic

Glass solders for joining of AlN-LTCC-composites

Topic

Glass solders and Active filler brazes joining of SiC

Topic

Glasses and glass-ceramics for Li-ion-batteries

Topic

Active filler brazes for joints of nitride ceramics and metal foils

Topic

Electric conducting glass-carbon-composites

Topic

Degradation mechanisms of sealing glasses for SOFC