The cathode tube including an outer surface and an inner surface configured to define a tube wall there between, wherein forming the cathode tube includes forming pores within the tube wall.

The process comprises blending and extruding, cooling, stretching, extracting organic pore former and inorganic pore former, and heat setting treating.

The present invention relates to reticulated pore formers and ceramic articles including reticulated pore structures.

The use of reticulated pore formers enables the manufacture of highly permeable ceramic filters with controlled pore size distribution.

The pore forming templates are dissolved into a third solution by addition of a chemical in which the pore forming template is soluble, but the lipid bilayer is insoluble.

The pore former may include starch or an activated cellulose compounds.

A further disadvantage of the known method is the formation of pores and occlusions.

This stabilises the water droplets, thereby resulting in the formation of the cylindrical pores (2).

Lipids and pore forming templates are dissolved into a first solution.

If the heating has not decomposed the pore- forming particles, they are chemically removed from the, now pore-enhanced, the titanium dioxide particles.

The film includes a polyolefin, a nanoclay, and a pore forming filler.

Secondary pore forming agents, such as graphite may also be included.

The pore former (18) is at least partly thermally decomposed and/or burnt out to form an at least partly open-pored structure.

The ceramic forming precursor batch compositions include ceramic forming inorganic batch components and a recoverable pore forming agent such as cyclododecane.

The weight ratio of the pore-forming material for a ceramic composition is 0.1-50% by weight with respect to the total weight of the inorganic component and the pore-forming material for a ceramic composition.