Fraunhofer Institute for Ceramic Technologies and Systems IKTS
Sol/gel derived corundum membrane with increased pore size and improved pore shape
High strength porous corundum substrates by optimized powder technology and pore shape.
Sol/gel derived corundum membrane with increased pore size and improved pore shape: a selected dopant enables the transformation to corundum and the growth of round pores to diameters > 100 nm without loss of porosity. High permeability by sol/gel-typical low thickness.
Membranes of high permeability with pores > 100 nm and high-strength substrates made of corundum free of glassy components
Special sol/gel and powder-technical approaches enable development and manufacture of high-strength substrates (plain, hollow fibres) and of very thin membrane films of highest permeability.
Advantages
- Products with the exceptionally high chemical and thermal stability of pure corundum (also when prepared by sol/gel processes)
- High permeability by round shape of pores, manufacture of very thin membranes of corundum (e.g. by sol/gel approaches that give a pore size of about 200 nm)
- Special microstructures (pore shapes) and processes avoiding the generation of flaws enable a high strength of 80-100 MPa with an open porosity of about 40 vol-% at pore sizes between 100 and 500 nm
- Feasibility with porous hollow fibres and with flat geometries
Products and services offered
- Development of technologies for corundum substrates and membranes with highest strength and permeability at pores sizes > 100 nm
- Development of optimized materials for specific applications
- Upscaling investigations supporting the development of new products
- Investigations of the technical performance