4324 results about "Porous ceramics" patented technology

A method for manufacturing a porous ceramic scaffold having an organic / inorganic hybrid coating layer containing a bioactive factor includes (a) forming a porous ceramic scaffold; (b) mixing a silica xerogel and a physiologically active organic substance in a volumetric ratio ranging from 30:70 to 90:10 and treating by a sol gel method to prepare an organic / inorganic hybrid composite solution; (c) adding a bioactive factor to the organic / inorganic hybrid composite solution and agitating until gelation occurs; and (d) coating the porous ceramic scaffold with the organic / inorganic composite containing the bioactive factor added thereto. In accordance with the method, the porous ceramic scaffold may be uniformly coated with the organic / inorganic hybrid composite while maintaining an open pore structure, and stably discharge the bioactive factor over a long period of time.

A firing furnace comprising: a muffle formed so as to ensure a space for housing a formed body to be fired; a member that constitutes a heat generator and is placed on and / or around the muffle; and a heat insulating layer that contains said muffle and said heat generator inside thereof, wherein a carbon-natured sheet is placed in the vicinity of corner portions of an inner face of said heat insulating layer.

An object of the present invention is to provide a honeycomb filter for purifying exhaust gases which makes it possible to alleviate a thermal stress generated due to occurrence of a local temperature change and which is less likely to generate cracks and superior in strength and durability, an adhesive that has a low thermal capacity and is capable of alleviating the thermal stress, a coating material that has a low thermal capacity with a superior heat insulating property and is capable of alleviating the thermal stress, and a manufacturing method of the honeycomb filter for purifying exhaust gases that can improve precision in the outside dimension, and reduce damages in the manufacturing processes.The present invention relates to a honeycomb filter for purifying exhaust gases, having a structure in that a plurality of column-shaped porous ceramic members, each having a number of through holes that are placed side by side in the length direction with partition wall interposed therebetween, are combined with one another through adhesive layers so that the partition wall that separate the through holes are allowed to function as a filter for collecting particulates, and in this structure, the thermal expansion coefficient αL of the adhesive layer and the thermal expansion coefficient αF of the porous ceramic member are designed to have the following relationship:0.01<|αL−αF| / αF<1.0.