Described are porous sintered metal bodies, methods of making and using the porous sintered metal bodies, and methods of using the porous sintered metal bodies for commercial applications that include filtering a fluid, including in applications requiring high efficiency (high LRV) filtration.

Provided is a cylindrical filter for a gas generator including a metal wire in a wound state, the metal wire including a plurality of recess portions provided on a first surface side and formed at intervals in a length direction thereof, the metal wire being wound with a surface including the recess portions facing an inner circumferential surface side of the cylindrical filter for a gas generator, and the recess portions of the metal wire being present on an inner side of the metal wire which extends from an inner circumferential surface toward an outer circumferential surface of the cylindrical filter.

A filter comprising a plurality of metal fibers having a non-round cross section, in particular a rectangular, quadric, partial circular or an elliptical cross section, with the cross section comprising a large axis and a small axis, wherein a ratio of the small axis to the large axis lies in the range of 0.99 to 0.05. The invention further relates to a treatment method for metal fibers comprising an elliptical or rectangular cross section, both having a large axis and a small axis, wherein a ratio of a length of the small axis to a length of the large axis is smaller than 1, preferably smaller than 0.5, wherein the treatment method comprises the step of heating the fibers (10) in an oven to a temperature value in C. between 70 and 95% of the melting temperature in C., such that the ratio of the length of the small axis (D2) to the length of the large axis (D1) increases, preferably to the range of 0.05 to 0.99, wherein the metal fibers (10) are at least a part of a filter according to the invention.

A method of fabricating an article includes providing an arrangement of loose nanowires and bonding the loose nanowires in the presence of carbon together into a unitary cellular structure.

The present invention discloses a FeAl-based metal porous membrane and a preparation method thereof, which relate to the technical field of industrial gas-solid and liquid-solid separation and purification, and mainly address problems in the prior art, such as cracking-prone and peeling of a membrane layer of an existing FeAl-based metal porous membrane during its preparation and use. The preparation method of the present invention comprises the steps of: adding a FeAl-based metal powder and a metal fiber powder into an organic-additive-added water-based solvent, and mixing them into a slurry; casting the slurry, through a casting machine, to form a membrane green body on a metal substrate layer, and letting it dry; and placing the dried membrane green body in a sintering furnace, to remove organic substances and perform high-temperature sintering and predetermined-temperature reaction synthesis.

Embodiments of the present invention provide a hollow cylindrical filter for removing efficiently foreign substances from fluids. This is performed by forming complicated passages including an axial direction and a radial direction in the filter. The hollow cylindrical filter is formed by winding a metal wire rod in a spiral and multilayered manner. The metal wire rod includes a recess formed throughout the entire length in a longitudinal direction, or recesses repeated along said longitudinal direction. Some wire rod layers extend in an axial direction of the hollow cylindrical filter while the adjacent wire rod layers extend in an intersecting direction, thereby forming a plurality of communication paths for communicating between the overlapping wire rod layers. Additionally, a space is formed between the recess of one wire rod layer and another adjacent wire rod layer, allowing the plurality of communication paths to communicate with each other.

Methods of forming solid carbon products include disposing nanostructure carbon in a container, disposing the container in a press, compressing the nanostructured carbon within the container, and fastening a lid to the container to form a filter. Further processing may include sintering the nanostructured carbon within the container and heating the nanostructured carbon within the container in an inert environment to form bonds between adjacent particles of nanostructured carbon. Other methods may include forming a plurality of compressed nanostructured carbon modules, placing the plurality of compressed nanostructured carbon modules within a container, and placing a lid on the container to form a filter structure. Related structures are also disclosed.

A fluid purification system capable of removing contaminants from significant volumes of fluids under low pressure conditions and at reasonable flow rates is provided. The system comprises a first fluid purification media comprising a rigid porous purification block. The rigid porous purification block includes a longitudinal first surface; a longitudinal second surface disposed inside the longitudinal first surface; and a porous high density polymer disposed between the longitudinal first surface and the longitudinal second surface. The system further includes a second fluid purification media, comprising a fibrous, nonwoven fabric disposed adjacent to the first surface of the first fluid purification media, the second surface of the first purification media, or both.

Methods of forming solid carbon products include disposing nanostructure carbon in a container, disposing the container in a press, compressing the nano structured carbon within the container, and fastening a lid to the container to form a filter. Further processing may include sintering the nanostructured carbon within the container and heating the nanostructured carbon within the container in an inert environment to form bonds between adjacent particles of nanostructured carbon. Other methods may include forming a plurality of compressed nanostructured carbon modules, placing the plurality of compressed nanostructured carbon modules within a container, and placing a lid on the container to form a filter structure. Related structures are also disclosed.

A structure of a metal fiber constituting a filter is set to a structure in which a cross-sectional shape of the metal fiber is a curved or bent shape and an outer member and an inner member having a linear expansion coefficient greater than that of the outer member are bonded to each other. Accordingly, the metal fiber is deformed to warp to the outer member side in the length direction thereof when the temperature of the metal fiber increases. When a amount of deformation per unit temperature of the metal fiber is defined as a deformation rate, a amount of change of the deformation rate per unit time changes at a predetermined deformation temperature with the increase in temperature. The deformation temperature is set to a temperature higher than a target temperature of a filter regenerating process.