109 results about "Porous layer" patented technology

A gas separation membrane for separating carbon dioxide includes: a separation layer formed of a polymer material and having a function of selecting and separating carbon dioxide; and a porous substrate including a first porous layer and a second porous layer. The gas separation membrane has a layer thickness T1 of 0.1 μm or more and 10.0 μm or less, an average pore diameter d1 of 10 nm or more and 10,000 nm or less, an aperture ratio A1 of 40% or more and 80% or less, a maximum height roughness R1 of 1 nm or more and 200 nm or less, a layer thickness T2 of 10 μm or more and 1,000 μm or less, a ratio d2 / d1 of an average pore diameter d2 to the average pore diameter d1 of 1.1 or more and 10,000 or less, and a ratio A2 / A1 of an aperture ratio A2 to the aperture ratio A1 of 1.1 or more and 2.0 or less.

The invention relates to a chlorine dioxide sustained-release ball, which relates to the technical field of environmental protection and disinfection, and comprises an activated alumina ball and an inorganic porous layer from inside to outside, wherein the activated aluminum oxide ball is loaded with sodium chlorite and a porous film, and the inorganic porous layer is loaded with the porous film. The chlorine dioxide sustained-release ball disclosed by the invention realizes the goals of high load, long period, constant-speed release and stable physical form.

This invention provides a method for constructing a stiffness equivalent model of a porous laminated structural member, including: S1, obtaining the unit cell characteristic size parameters of the pores on the laminates; S2, constructing a unit cell solid model of the laminates; S3, constructing a unit cell solid finite element analysis model of the laminates; S4, preprocessing the unit cell solid finite element analysis model; S5, calculating the stiffness equivalent modulus of the laminates at different temperatures; S6, repeating steps S1 to S5 to calculate the stiffness equivalent modulus of all laminates in the porous laminated structural member in each direction at different temperatures; S7, performing integrated boundary processing on the stiffness equivalent modulus calculated in step S6 to construct the stiffness equivalent model of the porous laminated structural member. This method can simplify porous laminated structural members into non-porous laminated structural models, effectively reflecting the mechanical properties of porous laminated structural members, while significantly improving computational efficiency and accuracy, and has broad engineering application prospects.

An electrochemical apparatus includes a separator, a positive electrode plate, and an electrolyte solution, where the separator includes a porous layer, and an average pore diameter of the porous layer is 0.5 μm to 18 μm; the electrolyte solution includes propyl propionate, and based on a mass of the electrolyte solution, a mass content of propyl propionate is 25% to 55%; and the positive electrode plate includes a positive active material layer, the positive active material layer includes a conductive agent, the conductive agent includes at least one of conductive carbon black or Ketjen black, and a specific surface area of the conductive agent is 600 m2 / g to 1100 m2 / g.

The utility model discloses a heating body, an atomizer and an aerosol generating device. The heating body comprises a storage piece, a base body and a heating piece. The storage piece is provided with a storage cavity, and the storage cavity is used for storing an aerosol generating substrate. The matrix comprises a porous layer and a compact layer, the porous layer is provided with a flow channel for the aerosol generating matrix to flow, the compact layer and the storage piece are arranged on the two opposite sides of the porous layer respectively, the periphery of the matrix extends out of the periphery of the storage piece, and the compact layer is used for preventing the aerosol generating matrix from flowing out of the side, connected with the compact layer, of the porous layer. The heating piece is arranged on the base body and used for heating the aerosol generating substrate. According to the heating element, the atomizer and the aerosol generating device, the heating element can preheat the aerosol generating substrate through the storage element, and a preheating circuit does not need to be additionally arranged, so that the structure of the heating element can be simplified, and miniaturization of the heating element is facilitated.

The application provides a cavity structure in bulk silicon and a preparation method thereof. The preparation method comprises the following steps: providing a silicon substrate; etching a first porous layer on the upper surface of the silicon substrate; etching a second porous layer; removing the second porous layer by etching to form a cavity connected with the first porous layer; and forming a thin film layer on the upper surface of the silicon substrate and the upper surface of the first porous layer. The preparation method is simple, efficient and low in cost. Moreover, the size of the cavity and the uniformity of the thickness of the silicon thin film can be effectively controlled through the design of the first porous layer and the second porous layer.

To suppress deformation occurring during shaping in a method for three dimensional shaping by laminating thin layers formed by melting and solidifying powder.SOLUTION: In a powder bed type three dimensional shaping apparatus, metal powder is irradiated with a laser, the powder is melted and solidified to form a thin layer, and the thin layer is laminated to perform three dimensional shaping. At this time, a high-density layer L21 having a high density and a porous-density layer L22 having a low density are formed in a mixed manner by changing the amount of energy of laser irradiation. The high density layer and the microporous layer can be formed in various thicknesses (test pieces P2 to P4), and the high density layer and the microporous layer may be alternately formed (test pieces P6 to P9). In this way, by forming the high-density layer and the porous layer in a mixed manner, it is possible to suppress distortion without lowering the mechanical strength of the shaped article.SELECTED DRAWING: Figure 2

The invention relates to a method for preparing a support (1) for a composite substrate (S) comprising forming a surface porous layer (P) on a first face (1c) of the support (1), and applying a viscous solution comprising a solvent and a precursor of a filler material to the first face (1c) of the support (1) so as to absorb at least a portion of the viscous solution into open pores of the surface porous layer (P). In a fourth step, the support (1) is heat-treated to transform the viscous solution present in the open pores so that they are filled with the filler material. Figure to be published with the abbreviation: Fig 1

The invention relates to the technical field of fabricated wallboards, and discloses a heat preservation and sound insulation device for fabricated wallboards, comprising: a wallboard main body, the wallboard main body comprising an outer panel, an inner panel and a functional core layer arranged between the outer panel and the inner panel; the functional core layer is composed of a plurality of functional sub-layers which are stacked in the thickness direction and have continuously changing physical properties; the sealing strips are preformed, are arranged on the two splicing side edges of the wallboard main bodies and are used for forming joint sealing when the adjacent wallboard main bodies are spliced; and the rapid splicing assembly is used for rapidly connecting the adjacent wallboard main bodies, and the rapid splicing assembly comprises a rapid connecting piece arranged on one wallboard main body. Through the gradient design of the functional core layer, heat reflection, heat insulation and broadband sound absorption are orderly integrated. The outer compact layer and the middle gradient porous layer can effectively reflect radiant heat, block heat conduction and convection and attenuate wide-frequency-band sound wave energy, so that the wallboard component has heat preservation and full-frequency-band sound insulation and absorption performance.

In a general aspect, gettering elements are disclosed for absorbing gas species from a cavity of a vapor cell. In certain aspects, a vapor cell includes a dielectric body having interior and exterior surfaces. The interior surface defines a cavity in the dielectric body, and the exterior surface defines an opening to the cavity. The dielectric body also includes a channel having a porous layer that is configured to absorb a gas species from the cavity. The vapor cell also includes a vapor or a source of vapor residing in the cavity as well as an optical window that covers the opening to the cavity. The optical window has a surface bonded to the exterior surface of the dielectric body to form a bonded interface of the vapor cell. The bonded interface includes a seal around the opening, and the vapor or the source of vapor includes alkali metal atoms.

The invention discloses a gradient porous enhanced heat exchange plate with vertical microchannels and a preparation method thereof, and the preparation method comprises the following steps: stamping a substrate to form a required macroscopic flow channel; a metal gradient porous layer with the average pore diameter gradually decreasing from the side close to the base plate to the side away from the base plate is constructed on the surface of the base plate with the macroscopic flow channel through a thermal spraying technology; performing scanning etching on the surface of the metal gradient porous layer by adopting short pulse laser equipment to form a series of vertical micro-channels; and carrying out thermal diffusion treatment on the sheet in a protective atmosphere. According to the method, the process of stamping and then thermal spraying is combined with laser etching, high-temperature deformation of the substrate is avoided, capillary force and a steam escape path are optimized through a gradient aperture structure, and directional high-speed steam escape and interface metallurgical bonding are achieved through the vertical microchannel array and thermal diffusion treatment; therefore, the heat transfer coefficient, the critical heat flux and the structural reliability of the heat exchange plate are synergistically improved.

A particle generator (1) for testing or calibrating particle measuring devices (5) is proposed, which has a reaction chamber (2), a drying chamber (3) downstream of the reaction chamber (2), wherein air is supplied to the reaction chamber (2) via a supply line (11) and the output of the drying chamber (3) can be connected to a particle measuring device (5) via a connecting line (12).In order to provide a particle stream or aerosol for testing or calibrating a particle measuring device (5) in a cost-effective manner, it is proposed that the reaction chamber (2) has a porous layer (21) on which a salt solution (22) is arranged, and that the supply of air into the reaction chamber (21) is made below the porous layer, so that rising bubbles are generated in the salt solution which, when they burst, release salt particles which are dried in the drying chamber (3) before the particles flow to the connecting line (12) in the form of an aerosol.

This invention relates to the field of fiber optic sensing technology, specifically to a method for fabricating a low-temperature temperature-sensitive fiber grating based on a negative thermal expansion material coating, and the low-temperature temperature-sensitive fiber grating structure thereof. The method includes the following steps: preparing and pre-treating an optical fiber core layer; coating the outer periphery of the optical fiber core layer with nano-sized zirconium hafnium to obtain a stress transfer layer; preparing a low-temperature negative thermal expansion coefficient sensitizing material powder and coating it on the outer periphery of the optical fiber stress transfer layer to obtain a negative thermal expansion material sensitizing coating layer; constructing a porous structure on the surface of the obtained negative thermal expansion material sensitizing coating layer to form a porous layer on the surface of the negative thermal expansion material; and encapsulating a composite shell structure on the outside of the porous layer on the surface of the negative thermal expansion material to obtain a metal sheath layer. The fiber grating structure provided by this invention, for adapting to the production of temperature sensors, can simultaneously solve the failure problems of traditional sensors in the 4K ultra-low temperature region, the interference problems of electrical sensors in strong electromagnetic field environments, and the sealing failure problems caused by material brittleness in cryogenic environments.

A chemical reactor implemented on a substrate is described. The chemical reactor includes at least one channel for transporting a liquid and / or gas during operation of the chemical reactor. The channel comprises pillar structures perpendicular to the bottom of the channel having a transverse section parallel to the bottom that is substantially rectangular and wherein the pillar structures are provided with a porous layer of substantially homogeneous thickness applied via electrochemical anodising.

The utility model relates to the field of vapor deposition, in particular to a gas distribution device and a deposition cavity. The deposition cavity comprises a gas distribution device and a substrate. The gas distribution device comprises a diffusion plate horizontally arranged on the top of the inner side of the deposition cavity. The diffusion plate comprises an upper isolation layer, a lower isolation layer and a porous layer connected between the upper isolation layer and the lower isolation layer, the density of the porous layer is smaller than or equal to 40% of the density of the upper isolation layer, and a plurality of gas through holes are evenly distributed in the surface of the diffusion plate and penetrate through the upper isolation layer, the lower isolation layer and the porous layer. The substrate is horizontally arranged below the diffusion plate and is opposite to the diffusion plate, and the substrate and the diffusion plate are both connected to a power supply and are respectively used as an upper electrode and a lower electrode for plasma discharge during deposition. The porous layer with lower density is arranged between the upper isolation layer and the lower isolation layer, so that the overall density and mechanical strength of the diffusion plate are reduced, the weight is reduced under the condition that the thickness of the diffusion plate is kept, and deformation of the diffusion plate caused by self weight, uneven heating and the like is inhibited.

This solves the problem of inefficient heat exchange using conventional heat exchange tubes. [Solution] The invention comprises a tube and a porous layer, wherein the tube has a plurality of ribs, the plurality of ribs extending along the axial direction of the tube and forming the inner circumferential wall of the tube, the porous layer has a plurality of pores, the porous layer is located at least on the plurality of ribs, the porous layer has a first layer and a second layer, the first layer covers the plurality of ribs, the second layer is located on the surface of the first layer, and the average pore diameter of the plurality of pores in the second layer is greater than the average pore diameter of the plurality of pores in the first layer. According to the present invention, the efficiency of heat exchange can be increased.

According to the integrated two-phase liquid cooling plate and the preparation method, a porous layer is attached to the periphery of a micro-channel, so that the specific surface area of the micro-channel can be increased, and when liquid flows out through the micro-channel, capillary force provided by the porous layer on the micro-channel can rapidly guide heat on the liquid cooling plate into the liquid; due to the porous structure, liquid can be vaporized to form vaporization nucleation sites, and a gas-liquid two-phase region is formed, so that rapid and efficient heat transfer is realized; moreover, the method for preparing the porous material by synthesizing the porous intermetallic compound through the reaction of corresponding metal element powder has the compromise characteristic of metal and ceramic, and has the advantage that multistage micro-nano pores can be generated in situ.

The invention provides a TPMS self-suction phase change sweating cooling porous structure and a construction method thereof. Comprising a liquid phase conveying area used for initial entering and stable conveying of cooling liquid, a capillary liquid supply area used for continuously conveying the cooling liquid to the position close to the high-temperature environment side through the capillary action under the condition of no additional pump and a phase change evaporation area used for phase change evaporation and heat exchange of the cooling liquid, and the liquid phase conveying area, the capillary liquid supply area and the phase change evaporation area are sequentially arranged in a stacked mode in the thickness direction. A gas phase outlet area used for discharging steam generated by phase change in a directional and low-resistance manner is embedded in a local area, close to the high-temperature environment side, in the phase change evaporation area; the invention has the following beneficial effects: continuous fusion of different TPMS structures is realized in the porous layer along the thickness direction, and a gas phase outlet structure based on TPMS topological characteristics is arranged on the high-temperature side, so that stable self-suction transportation of a cooling liquid and directional and efficient discharge of a gas phase are realized; therefore, the heat transfer efficiency, the operation stability and the structural integrity of phase change sweating cooling are improved.

This invention relates to the field of biomedical materials, and discloses a biomimetic piezoelectric composite membrane, its preparation method, and its application. The biomimetic piezoelectric composite membrane comprises a dense layer and a porous layer. The dense layer contains a first L-polylactic acid and a first D-polylactic acid, while the porous layer contains a second L-polylactic acid, a second D-polylactic acid, and hydroxyapatite. This invention employs a stepwise continuous electrospinning technique to obtain a biomimetic piezoelectric composite membrane with an integrated dense-porous-porous layer structure. The dense layer prevents soft tissue ingrowth into bone defect areas, while the porous layer acts as a porous scaffold, supporting and guiding new bone growth. Simultaneously, it generates electrical signals in response to mechanical stress, promoting osteogenic differentiation. Furthermore, the porous layer is composited with nano-hydroxyapatite, providing essential calcium and phosphorus elements for osteogenic formation. This synergistic effect enhances alveolar bone regeneration and repair capabilities from multiple perspectives, including electrical, chemical, and topological aspects.

The application relates to the technical field of C03C, in particular to a preparation method of a glass surface anti-reflection self-cleaning structure and application thereof, which at least comprises the following steps: (1) glass substrate pretreatment: washing a glass substrate and then blowing dry; (2) glass substrate corrosion: adopting etching liquid to corrode one side of the glass substrate treated in the step (1) to form a glass porous layer; (3) amorphous TiO2 deposition: placing the glass substrate treated in the step (2) into a TiCl4 solution to perform a deposition reaction; (4) removal of amorphous TiO2 on the outer surface: placing the glass substrate treated in the step (3) into contact with a hydrofluoric acid aqueous solution, then washing and blowing dry; (5) amorphous TiO2 calcination: placing the glass substrate treated in the step (4) into a muffle furnace to perform calcination, and the glass surface structure prepared by the method has the functions of anti-reflection, super-hydrophobic self-cleaning and titanium dioxide photocatalytic self-cleaning.

The present invention relates to: a composite semipermeable membrane which comprises a base material, a porous layer that is provided on one surface of the base material, and a separation function layer that is provided on the porous layer, wherein the mass of the porous layer is 3 g / m2 to 13g / m2 inclusive and the root mean square height Rq of the surface of the base material on the side where the porous layer is provided is 1.0 µm to 6.0 µm inclusive; and a separation membrane element which is provided with the composite semipermeable membrane.

A separator for alkaline hydrolysis comprising a porous layer, the porous layer comprising inorganic particles, characterized in that the inorganic particles have a fraction of primary particles having a diameter above 100 nm of lower than 3% by number, as measured by Transmission Electron Microscopy (TEM).

In a general aspect, gettering elements are disclosed for absorbing gas species from a cavity of a vapor cell. In certain aspects, a vapor cell includes a dielectric body having interior and exterior surfaces. The interior surface defines a cavity in the dielectric body, and the exterior surface defines an opening to the cavity. The dielectric body also includes a channel having a porous layer that is configured to absorb a gas species from the cavity. The vapor cell also includes a vapor or a source of vapor residing in the cavity as well as an optical window that covers the opening to the cavity. The optical window has a surface bonded to the exterior surface of the dielectric body to form a bonded interface of the vapor cell. The bonded interface includes a seal around the opening, and the vapor or the source of vapor includes alkali metal atoms.

The present application relates to a kind of microchannel electrode support and its preparation method and application, the electrode support is relatively provided with dense layer and porous layer along the thickness direction, microchannel is provided between the dense layer and porous layer, the microchannel extends from the dense layer to the porous layer direction;The microchannel is variable-diameter channel, its aperture gradually decreases from the dense layer to the porous layer along the extension direction.Pore size distribution of the electrode support is 0.5~40 μm, the thickness is 600~1500 μm, porosity is 30~70%.The microchannel electrode support is mainly prepared by phase inversion process, is formed by key steps such as solvent replacement, constant temperature drying and high-temperature calcination in turn.Compared with prior art, the microchannel electrode support of the present application maintains high porosity under high temperature conditions, so that fuel gas and oxygen can be quickly absorbed and released, thereby accelerating the chemical reaction rate, improve the working efficiency of SOFC / SOEC.

The invention discloses a cast aluminum alloy laser welding method and a cast aluminum alloy welding structure, and the cast aluminum alloy laser welding method comprises the steps that a first cast aluminum alloy base body is provided, and the surface of the first cast aluminum alloy base body is provided with a to-be-welded surface; forming a high-entropy alloy powder layer on the to-be-welded surface; sintering the high-entropy alloy powder layer through first laser to form a porous layer; and the porous layer is connected with a second cast aluminum alloy base body in a welded mode. According to the cast aluminum alloy laser welding method provided by the embodiment of the invention, the technical problem that in the welding process of the cast aluminum alloy structure, air holes, cracks and the like are likely to appear at the welding position, and the welding quality of the cast aluminum alloy structure is affected can be solved.

The application provides a composite porous structure for thermal management and a preparation method, and the composite porous structure comprises an external sweating porous layer and an internal support framework; the thickness of the external sweating porous layer is 2-20 mm, the internal sweating porous layer contains three-dimensional micrometer-sized pores, the pore diameter is 20-200 mu m, and the porosity is 10%-50%; the support framework adopts a TPMS lattice framework, the lattice unit size is 5-10 mm, and the lattice wall thickness is 0.3-1.5 mm; three-dimensional interconnected pores are formed in the internal TPMS lattice framework, the cooling medium is transmitted through the three-dimensional interconnected pores of the lattice framework, and sweating cooling is implemented through the sweating porous layer. The application integrates the design of the TPMS lattice framework in the internal sweating structure, forms a micro-macro composite porous structure of'sweating porous + TPMS lattice porous', realizes the integrated design of the structure function of thermal protection-supporting thermal management, and is prepared in the mode of additive manufacturing, so that the efficiency of the thermal management system in the fields of aviation, aerospace, automobiles, nuclear power and the like is improved.

A layered structure can include a porous layer over a substrate and a thermal layer coupled to pore walls of the porous layer. The porous layer can have a higher resistivity than the substrate. A stress of the porous layer can be proportional to a variance of infrared (IR) transmission data of the porous layer. The variance of IR transmission data can be no greater than 2,500. Advantageously the thermal layer can decrease stress in the porous layer, increase thermal stability of the porous layer, decrease cracking and flaking during high temperature processing, maintain high resistivity of the porous layer, and increase the quality of the epitaxial layer and / or semiconductor devices formed using the porous layer.

An inlay for a component carrier includes a gas-permeable porous layer structure, an upper layer structure, arranged on the gas-permeable porous layer structure, the upper layer structure defining a cavity such that a portion of the gas-permeable porous layer structure is exposed and an upper metal layer structure arranged on the upper layer structure. A component carrier with the inlay and manufacturing methods of the inlay and the component carrier are described.