A ceramic honeycomb structure comprising large numbers of flow paths longitudinally formed by cell walls arranged in a lattice pattern in cross section, and an outer peripheral wall formed around the flow paths; in a cross section perpendicular to the longitudinal direction, fan-shaped bulges projecting in a fan shape toward the flow paths from cell wall intersections at which the cell walls are crossing; the circumscribed circles of circular portions of the fan-shaped bulges at all cell wall intersections having a constant radius; and when the distance between the center point of the circumscribed circle and the center point of the cell wall intersection is defined as a center point distance S, a center point distance So in the outer peripheral portion of the ceramic honeycomb structure and a center point distance Sc in the center portion meeting Sc<So.

A disclosed embodiment provides a clothes care device which can improve service life, is not influenced by humidity, and can resolve odor problems. A clothes care device, according to one aspect of the present invention, comprises: an air blower; a flow path through which air, which is made to flow by the air blower, moves; and a deodorizing module for purifying the air which is made to flow by the air blower. The deodorizing module comprises: a ceramic filter provided inside the flow path; and an ultraviolet light emitting unit provided on the outside of the flow path so as to face the ceramic filter.

Disclosed are ceramic bodies comprised of composite cordierite-mullite-aluminum magnesium titanate (CMAT) ceramic compositions having high cordierite-to-mullite ratio and methods for the manufacture of same.

Provided is a method of manufacturing a nano-catalyst filter, which includes depositing through electrodeposition a catalyst precursor inside a porous filter to which an electrode layer is attached. Using this method, a nano-catalyst can be uniformly deposited inside a porous ceramic filter, and high catalyst efficiency can be obtained only using a small amount of the nano-catalyst.

A honeycomb filter including: a honeycomb structure having a porous partition wall provided surrounding a plurality of cells; and a plugging portion disposed to seal either one end portion on the inflow or the outflow end face side of the cells, wherein the cell in which the plugging portion is provided at the outflow end face side and the inflow end face side is open is defined as an inflow cell, the cell the plugging portion is provided at the inflow end face side and the outflow end face side is open is defined as an outflow cell, the honeycomb structure further has a trapping layer for the particulate matter on an inner surface side of the partition wall, the trapping layer includes a portion composed of a sintered body of CeO.sub.2 particles on at least a surface layer, and the average particle diameter is 1.1 μm or less.

An in situ system of filter rejuvenation has a fluid inlet on a first side of a reaction chamber, a fluid outlet disposed on a second side of the reaction chamber, a filtration chamber with a first wall comprising a ceramic glass material with a pass-band in the infrared spectrum. The filtration chamber is in fluid communication with the fluid inlet and the fluid outlet so that a fluid introduced into the inlet passes through the filtration chamber and exits through the fluid outlet. The system has at least one infrared heating element configured to transmit infrared energy within the pass-band of the ceramic glass material to heat the filter medium disposed within the filtration chamber to a temperature of at least 260° C., which can gasify contaminants without combustion.

Among others, the present invention provides masks each with mask filter or mask body comprising one or more filter layers fabricated by integrated circuit fabrication processes. Such filter layer includes well-defined and substantially uniform pore size, and allows the mask to be washable and reusable. The prevention invention also provides methods for fabricating a single layer or multi-layer mask body or mask filter to be incorporated by a face mask.

An exhaust gas purification filter includes a honeycomb structure part and sealing parts. The honeycomb structure part has a porous partition wall and a plurality of cells defined by the partition wall to form exhaust gas flow paths. The sealing parts seal alternately a gas inflow-side end face or a gas outflow-side end face of the cells. The exhaust gas purification filter includes fine pores with diameters of 10 μm or less measured by the mercury intrusion method that account for 5% or more of all pores by volume in the honeycomb structure part. The partition wall has a plurality of communication pores communicating between the cells adjacent to the partition wall and has constricted communication pore of which a largest diameter Φ.sub.1 and a smallest diameter Φ.sub.2 satisfy relationships Φ.sub.1≥50, 100×Φ.sub.2/Φ.sub.1≤20.

A ceramic filter having a pillar-shaped honeycomb structure, wherein when observing a plurality of pores from a surface of partition walls with a laser microscope and plotting an equivalent circle diameter (μm) of each pore on an X-axis and a pore depth (μm) of each pore on a Y-axis on a two-dimensional coordinate system, a slope of a regression line (y/x) obtained by a least squares method in a range of 20≤x≤40 is 0 to 0.20, an average value of the pore depth of the plurality of pores is 2.5 μm to 5.0 μm, and a number density of the plurality of pores is 600/mm.sup.2 to 2450/mm.sup.2.

A honeycomb structure comprising a pillar-shaped honeycomb structure body having a porous partition wall disposed so as to surround a plurality of cells, wherein let that A denotes an absolute value of open frontal area (%) in a plane of the honeycomb structure body orthogonal to the extending direction of the cells and P denotes an absolute value of porosity (%) of the partition wall, the honeycomb structure has a value represented by the following expression (1) that is 0.05 to 0.12, let that D denotes an average pore diameter (m) of the partition wall and G denotes a geometric surface area (mm.sup.2/mm.sup.3) of the partition wall, the honeycomb structure has a value represented by the following expression (2) that is 8 to 50 (μm×mm.sup.2/mm.sup.3), and the honeycomb structure has a hydraulic diameter of the cells that is 1.1 mm or more,

(1−A/100)×(1−P/100),  Expression (1)

D×G.  Expression (2)