Extremely thin ceramic components made possible by extrusion
Manufacturing of long, thin-walled and one-sidedly closed tubes of high-performance ceramics by highly productive extrusion.
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.
http://www.ikts.fraunhofer.de/content/dam/ikts/en/doc2/Press-and-Media/Press_rel…
Media Contact
All latest news from the category: Materials Sciences
Materials management deals with the research, development, manufacturing and processing of raw and industrial materials. Key aspects here are biological and medical issues, which play an increasingly important role in this field.
innovations-report offers in-depth articles related to the development and application of materials and the structure and properties of new materials.
Newest articles
NASA: Mystery of life’s handedness deepens
The mystery of why life uses molecules with specific orientations has deepened with a NASA-funded discovery that RNA — a key molecule thought to have potentially held the instructions for…
What are the effects of historic lithium mining on water quality?
Study reveals low levels of common contaminants but high levels of other elements in waters associated with an abandoned lithium mine. Lithium ore and mining waste from a historic lithium…
Quantum-inspired design boosts efficiency of heat-to-electricity conversion
Rice engineers take unconventional route to improving thermophotovoltaic systems. Researchers at Rice University have found a new way to improve a key element of thermophotovoltaic (TPV) systems, which convert heat…