The Fraunhofer Institute for Ceramic Technologies and Systems IKTS developed a novel concept to produce thin-walled, one-sidedly closed tubes and similar geometries made of ceramics by highly productive extrusion. Thus, among others, the mass production of batteries becomes possible.
Extrusion is one of the most common shaping processes in technical ceramics. Preferably, it is used for the cost-effective production of axisymmetric components. Examples include honeycomb structures, tubes and profiles. The advantage of extrusion is the efficient production of complex structures in an endless strand.
Challenges lie in delicate shapes with very thin wall thicknesses. In consideration of chemical and abrasion resistance, extruder construction, tool design and feedstock were perfectly matched at Fraunhofer IKTS.
Additionally, the researchers conceptualized special removal and drying technologies, which prevent deformation of the designed components. The concept comprises a microwave drying with a special continuous dryer immediately adjoining the extruder mouthpiece in vertical extrusion.
For the production of the feedstock raw material mixtures were prepared for various functional materials and aqueously plasticized with organic excipients.
For thin-walled extruded products the so-called "green strength", i.e. the dimensional stability of the green body after leaving the die, is of great importance. The feedstocks, specifically developed for thin-walled geometries, are characterized by a very good green strength.
Gundula Fischer, head of the extrusion competence center at Fraunhofer IKTS: "For the first time, a complete technology package for the production of thin and one-side closed ceramic geometries in a short cycle time can be offered due to our concept.
For several highly interesting materials we have already demonstrated the capability, for example in electrolyte tubes that only now enable extremely cost-efficient batteries for the energy transition. With our equipment which includes various piston presses and auger extruders we are ready to realize customer projects."
From October 20 to 23 you will meet IKTS researchers in Hall B1 on CERAMIC APPLICATIONS Booth 219/320.
Katrin Schwarz | Fraunhofer-Institut für Keramische Technologien und Systeme IKTS
Fast flowing heat in layered material heterostructures
18.12.2017 | Graphene Flagship
One in 5 materials chemistry papers may be wrong, study suggests
15.12.2017 | Georgia Institute of Technology
A study carried out by an international team of researchers and published in the journal Physical Review X shows that ion-trap technologies available today are suitable for building large-scale quantum computers. The scientists introduce trapped-ion quantum error correction protocols that detect and correct processing errors.
In order to reach their full potential, today’s quantum computer prototypes have to meet specific criteria: First, they have to be made bigger, which means...
Since 2016, German and Spanish researchers, among them scientists from the University of Göttingen, have been hunting for exoplanets with the “Carmenes”...
DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.
Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
18.12.2017 | Life Sciences
18.12.2017 | Materials Sciences
18.12.2017 | Life Sciences