![Sol/gel derived corundum membrane with increased pore size and improved pore shape mikrofiltgr2](/en/departments/structural_ceramics/nonoxide_ceramics/materials_synthesis_development/porous_oxide_ceramics/Corundum_for_microfiltration/jcr:content/contentPar/sectioncomponent/sectionParsys/textblockwithpics/imageComponent1/image.img.jpg/1510038790664/mikrofiltgr2-tcm244-41088.jpg)
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. mikrofiltgr1](/en/departments/structural_ceramics/nonoxide_ceramics/materials_synthesis_development/porous_oxide_ceramics/Corundum_for_microfiltration/jcr:content/contentPar/sectioncomponent/sectionParsys/textblockwithpics/imageComponent2/image.img.jpg/1510038930263/mikrofiltgr1-tcm244-37517.jpg)
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. mikrofiltgr3](/en/departments/structural_ceramics/nonoxide_ceramics/materials_synthesis_development/porous_oxide_ceramics/Corundum_for_microfiltration/jcr:content/contentPar/sectioncomponent/sectionParsys/textblockwithpics/imageComponent3/image.img.jpg/1510038774240/mikrofiltgr3-tcm244-37518.jpg)
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