SciELO - Scientific Electronic Library Online

vol.55 issue335Adsorption study of the cationic surfactant in inorganic matrices prepared from niobium oxidesIncorporation of industrial laundry mud in the production of ceramic bricks author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand



Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google



Print version ISSN 0366-6913
On-line version ISSN 1678-4553


MULLER, D. et al. Processing and characterization of fibrous ceramic filters. Cerâmica [online]. 2009, vol.55, n.335, pp.318-325. ISSN 0366-6913.

Filters with fibrous structure were produced from low cost, commercially available raw materials and characterized for aerosol filtration. Refractory aluminosilicate fibers were uniaxially pressed with polyvinyl acetate as binder. Different pressures were applied, which yielded samples with different porosities. After pressing, the samples were heat treated at 500 ºC during 1 h in air for debinding with subsequent sintering at 1200 ºC for 1 h, which resulted in porous fibrous structures composed mainly by mullite (3SiO2.2Al2O3) with porosity in the range of 50%-75%. The microstructure of the fibrous filters was evaluated by scanning electron microscopy, which revealed a porous morphology comprised by three-dimensional interconnected fibers. Mechanical strength was measured by compressive and 4-point bending tests. Permeability and particle collection efficiency were evaluated and compared with commercially available filters. The permeability and collection efficiency values are in the order of magnitude of cellular supports for aerosol filters and, therefore, suitable for several technological applications.

Keywords : fibrous ceramic filters; mechanical properties; permeability; aerosol filtration.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License