Abstract:
A carbon composite comprises carbon microstructures having interstitial spaces among the carbon microstructures; and a binder disposed in at least some of the interstitial spaces; wherein the carbon microstructures comprise unfilled voids within the carbon microstructures.
Abstract:
L'objet de l' invention est un procédé de réalisation d'un élément poreux en céramique pour la diffusion d'eau pour l'arrosage, ledit procédé comprenant une étape de moulage sous pression d'une barbotine puis une étape de cuisson, caractérisé en ce que la barbotine comprend de 10 à 40 % de silices dont 30 à 100 % d'une silice avec une répartition granulométrique d'un premier type et 0 à 70% d'une silice avec une répartition granulométrique d'un second type avec un pourcentage de f ines de gros diamètres plus important que la répartition granulométrique du premier type.
Abstract:
In one aspect, the invention includes a refractory material, said material comprising: (i) at least 20 wt.% of a first grain mode stabilized zirconia based upon the total weight of said material, said first grain mode having a D50 grain size in the range of from 5 to 2000 μm, said stabilized zirconia including a matrix oxide stabilizer; (ii) at least 1 wt.% of a second grain mode having a D50 grain size in the range of from 0.01 μm up to not greater than one-fourth the D50 grain size of said first grain mode zirconia, based upon the total weight of said material; and (iii) at least 1 wt.% of a preservative component within at least one of said first grain mode stabilized zirconia, said second grain mode stabilized zirconia, and an optional another grain mode; wherein after sintering, said material has porosity at 20°C in the range of from 5 to 45 vol%.
Abstract:
Articles comprising carbon composites are disclosed. The carbon composites contain carbon microstructures having interstitial spaces among the carbon microstructures; and a binder disposed in at least some of the interstitial spaces; wherein the carbon microstructures comprise unfilled voids within the carbon microstructures. Alternatively, the carbon composites contain: at least two carbon microstructures; and a binding phase disposed between the at least two carbon microstructures; wherein the binding phase comprises a binder comprising one or more of the following: SiO 2 ; Si; B; B 2 O 3 ; a metal; or an alloy of the metal; and wherein the metal is at least one of aluminum; copper; titanium; nickel; tungsten; chromium; iron; manganese; zirconium; hafnium; vanadium; niobium; molybdenum; tin; bismuth; antimony; lead; cadmium; or selenium.
Abstract:
A porous ceramic matrix contains a plurality of ceramic particles adhered to each other, and a plurality of channels defined by surfaces of neighbouring ceramic particles, the channels each having an average diameter of 0.5-2.5 μm. Preferred ceramics also have a porosity of 25.0-40.0%, a Darcy's Permeability of 1.57-34.8 x 10 -14 m 2 , and a mechanical strength of 25-64 MPa. Also disclosed is a method of preparing such a porous ceramic matrix, comprising providing a pellet containing ceramic particles that are coated with a monomer, a catalyst, and a binder; polymerising the monomer in the solid state by heating, then carbonizing and sintering the pellet.
Abstract:
A method for manufacturing a filter element for a filter apparatus, and a filter element. The filter element comprises at least one permeable ceramic filter member. The method comprises the following steps: - manufacturing a green body of at least one filter member, - the green body comprising a rough joining interface on at least one of its surface, - firing the green body with the rough joining interface into the filter member, - providing a frame member comprising plastic material, and - attaching the filter member to the frame member in such a manner that at least a part of the surface of the filter memberformed as a rough joining interface is in contact with the plastic material of the frame member.
Abstract:
The invention relates to a ceramic filter element (22) for removal of liquid from solids containing material in a capillary suction dryer. The filter element comprises a ceramic substrate covered by a sintered ceramic microporous layer (31). The sintered microporous membrane layer is provided with coarse solid particles (71) of a particle size larger than a pore size of the membrane material layer(31) so as to form a textured surface (50) which prevents a filter cake from sliding off the surface of the filter element prior to the intended cake dis- charge.