Methods, systems, and devices for ultrasonic inspection for ceramic structures are described. The method may include transmitting, via an ultrasonic transmitter, an ultrasonic waveform through the ceramic structure, where the ceramic structure includes two opposing ends and one or more outer faces extending between the two opposing ends, the one or more outer faces being at least partially enclosed by a casing and the ultrasonic transmitter being positioned adjacent to a first of the two opposing ends. The method may also include receiving a propagated waveform via an ultrasonic receiver positioned adjacent to a second of the two opposing ends and generating an image based at least in part on the propagated waveform, the image illustrating at least a portion of the casing and one or more detected features of the ceramic structure at the one or more outer faces of the ceramic structure adjacent to the casing.

A skin-forming die includes an inlet face; an outlet face; one or more slots, each of the one or more slots comprising one or more slot inlets extending between the one or more slot inlets and the outlet face; a plurality of feedholes extending between the inlet face and the one or more slot inlets; and a central opening configured to receive a matrix die. Extrusion die apparatus and methods of manufacturing honeycomb bodies are also disclosed.

A honeycomb structure including: an outer peripheral wall; a partition wall disposed on an inner side of the outer peripheral wall, the partition wall defining a plurality of cells, each of the cells extending from one end face to other end face to form a flow path; and magnetic particles, wherein the magnetic particles contain secondary particles with primary particles combined, wherein in a cross-sectional image of the honeycomb structure, a ratio of a number of the primary particles forming the secondary particles to a total number of the primary particles of the magnetic particles is 40 to 100%, and wherein a particle size D50 corresponding to a cumulative frequency of 50% by number for the primary particles is 5 to 100 μm.

A thin-walled honeycomb body (100) having a plurality of repeating cell structures (110) formed of intersecting porous thick walls (112V, 112H) and thin walls (114V, 114H). Each repeating cell structure (110) is bounded on its periphery by the thick walls (112V, 122H) of a first transverse thickness (Tk) and the thin walls (114V, 114H) have a second transverse thickness (Tt) that subdivides each repeating cell structure (110) into between 7 and 36 individual cells (108). In the thin-walled honeycomb body (100), the first transverse thickness (Tk) of the thick walls (112V, 112H) is less than or equal to 0.127 mm (0.005 inch) and the second transverse thickness (Tt) of the thin walls (114V, 114H) is less than or equal to 0.0635 mm (0.0025 inch), and Tk>Tt. Honeycomb extrusion dies and methods of manufacturing the thin-walled honeycomb body (100) having thick walls (112V, 112H) and thin walls (114V, 114H) are provided.

The invention relates to a method for producing a wall-flow filter for removing fine particulate solids from gases, and to the use thereof for cleaning exhaust gases of an internal combustion engine. The invention also relates to a correspondingly produced exhaust-gas filter having a high filtration efficiency.

A honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall and a plugging portion, wherein a thickness of the partition wall is 0.257 mm or less, a porosity of the partition wall is 52 to 57%, an average pore diameter of the partition wall is 6 to 13 .Math.m, a number per unit area of pores which exist at a surface of the partition wall and which have equivalent circle opening diameters exceeding 3 .Math.m is 800 to 1500 /mm.sup.2, an average equivalent circle opening diameter of pores which exist at a surface of the partition wall and which have equivalent circle opening diameters exceeding 3 .Math.m is 8.0 to 12.0 .Math.m, and in a pore diameter distribution of the partition wall, D10 is 2.0 to 5.5 .Math.m, D90 is 13.0 to 25.5 .Math.m, and (Log(D90)-Log(D10))/Log(D50) is 0.84 or less.

A flue pipe filter device for reducing nitrogen oxide (NOx) emission levels from gas fired appliances may include a flue cap with a pipe connection adapter sized to attach to an existing exhaust pipe; a fanned flue cap body with vents operatively attached to a distal end of the pipe connection adapter; and a filter positioned within the fanned flue cap body, the filter designed to convert NOx emissions into reduced NOx emissions. The filter may have an interior honeycomb structure.

A honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall and a plugging portion, wherein, in a pore diameter distribution of the partition wall, in the case where the pore diameter (.Math.m) whose cumulative pore volume is 10% of the total pore volume is denoted by D10, the pore diameter (.Math.m) whose cumulative pore volume is 50% of the total pore volume is denoted by D50, and the pore diameter (.Math.m) whose cumulative pore volume is 90% of the total pore volume is denoted by D90, all of the following equations (1) to (6) are satisfied.

[00001]$\begin{array}{cc}\text{8}\text{.4}\mu \text{}\text{m<D10}& \text{­­­(1)}\end{array}$

[00002]$\begin{array}{cc}\text{17}\text{.5}\mu \text{}\text{m<D50<24}\text{.0}\mu \text{}\text{m}& \text{­­­(2)}\end{array}$

[00003]$\begin{array}{cc}\text{D90<55}\text{.2}\mu \text{}\text{m}& \text{­­­(3)}\end{array}$

[00004]$\begin{array}{cc}\left(\text{logD90-logD10}\right)/\text{logD50}\text{<0}\text{.60}& \text{­­­(4)}\end{array}$

[00005]$\begin{array}{cc}\text{logD90}/\text{logD50}\text{<1}\text{.30}& \text{­­­(5)}\end{array}$

[00006]$\begin{array}{cc}\text{logD50}/\text{logD10}\text{<1}\text{.38}& \text{­­­(6)}\end{array}$

The invention relates to a dust collector for gaseous fluids and to a method for manufacturing the dust collector. The dust collector includes one or more filtering assemblies (1) that have filtering elements (2). The filtering elements (2) have a tubular extension. They are kept in contact with each other along a direction parallel to their length; the filtering elements (2) enclose, between them, flow channels (3). The method for manufacturing a filtering assembly (1) of the dust collector includes the steps of: permanently deforming a sheet of a filtering material so as to obtain a corrugated sheet (8) with a cross-section defined by repetitions of ′Ω-shaped forms that are connected to each other; and coupling two deformed sheets, so as to keep the straight parts of the ′Ω-shaped forms in contact and to obtain rows of filtering elements (2).

A substrate coating apparatus comprises a source of a washcoat, a washcoat showerhead comprising a showerhead plate having a plurality of nozzle apertures for discharging the washcoat towards a face of the substrate located below the washcoat showerhead, a conduit fluidly connecting the source of the washcoat to the washcoat showerhead for supplying washcoat to the washcoat showerhead and a partition ring located between the washcoat showerhead and the face of the substrate. The partition ring is dimensioned to be smaller than the face of the substrate and the substrate coating apparatus is configured in use to bring the partition ring into contact with the face of the substrate to thereby define a central region of the face of the substrate which lies within an interior of the partition ring and a peripheral region of the face of the substrate which lies outside the partition ring. The showerhead plate of the washcoat showerhead is configured in use to discharge washcoat onto both the central region and the peripheral region of the face of the substrate.