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Porous ceramics
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Ceramic tubes & pipes
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Custom ceramic shapes
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Porous
ceramic filters
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Wearing & thermal shock
· Nano
functional coatings
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Photo-catalytic
porous ceramics
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Porous ceramic shapes
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Fine bubble diffusers
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Some
information
about our porous ceramics:
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Our
porous ceramics are generally made of alumina, mullite, zirconia, fused
silica and silicon carbide, although other types, for example, porous
boron nitride, can also be prepared
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Our
porous ceramics are all non-fibrous, thus are harmless. We have several
methods to control the interconnected porous structures. Until now,
majority applications of the porous ceramics require large pore sizes (
mostly in the range of 20-40 microns) because these applications require
low resistance flowing through of gasses or liquids.
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Our
nano-porous ceramics are made of alumina, zircon and Titania. In these
nano-porous ceramics extremely small amount of functional chemical species
such silver (or Cu) can be immobilised to have enhanced chemical
functions. Strong photo-catalysis
under visible light can be achieved on the nano-porous surfaces.
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Nano
porous ceramics can only be useful in thin forms (thin plates or coatings),
say, thinner than 0.5mm. This is because nano-porous structure is
extremely affinitive to external molecules, they have great tendency to be
immobilised (anchored to the walls of the nano-pores) in the pores, the
effects are that nano-pores are getting even smaller leading to blockage
of the pores.
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From
our experience of many years practice, capability of processing ceramic
shapes are more important than actual composition. This is because
ceramics are brittle materials (with low toughness, K1c),precision
machining of some shapes can be very difficult and costly. We have a
net-shape forming technique for a number of porous ceramic materials.
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