34results about How to "Improve effective quality" patented technology

The invention provides a novel preparation method of a high-performance continuous ZIF-8 (zero insert force-8) film for the high-performance separation and purification of gas, and mainly aims at solving the combination problem among a continuous even growth film, a film and a carrier of the ZIF-8 film. The preparation method is mainly characterized by comprising the following steps of: previously introducing growth point and a combination point on the surface of a porous carrier to form a thin layer of zinc oxide coating layer taken as a finished film, and growing in an inducing way to form the continuous even ZIF-8 film. An active point of the film homogeneous nucleation is introduced, the combination force problem between the film and the surface of the carrier is solved, and the surface of the carrier is modified by the coating layer, so that the high-quality film can be preferably formed. Compared with the conventional preparation method of the ZIF-8 film, the novel method adopted by the invention not only is high in film-forming effective mass, simple in process, and convenient for large-scale preparation and amplification, so that the method has a potential application prospect and a wide application value.

The invention provides a method for preparing high-performance Half-Heusler block thermoelectric materials at ultrahigh speed and low cost. The method particularly includes the steps that firstly, according to the general formula ABX of Half-Heusler compounds, powder A, powder B and powder X are weighed at the chemical stoichiometric ratio of 1:1:1, used as raw materials and uniformly mixed, and then an reactant is acquired; secondly, the reactant generates a combustion synthesis reaction, and cooling or quenching is conducted after the reaction is finished; thirdly, a product acquired through the second step is ground into fine powder, then PAS is conducted, and then the high-performance Half-Heusler block thermoelectric materials are acquired. According to the method, by the combination of the combustion synthesis reaction with the PAS process, the high-performance Half-Heusler block thermoelectric materials can be prepared within 15 min, and the method has the advantages that preparation time is short, energy consumption is low, the process is simple, the requirement for equipment is low, repeatability is good, and the method is suitable for large-scale production.

The invention aims to provide a coil built-in semiactive vibration absorber with a closed structure. The coil built-in semiactive vibration absorber comprises an outer shell, a base, a shaft, an armature, a spring, an upper cover and a ferromagnetic coil, wherein the outer shell is connected with the base; the upper cover is arranged on the outer shell; the armature is arranged in the outer shell and is connected with the outer shell; the shaft passes through the armature and is arranged on the base; a spring for positioning is arranged between the shaft and the armature; the outer shell, the base and the upper cover form the closed structure; an annular slot is formed on the central outer wall of the armature; and the ferromagnetic coil is arranged in the annular slot. A base supporting mode replaces a shaft supporting mode, so the gravity center is reduced, the supporting area is increased, the installation stability is improved, and the anti-swing capacity of the supporting mode is about within 45 degrees. A coil winding is combined with an active cell mass block, so the mass of a stator is reduced relatively and the mass of an active cell is increased; therefore, the volume of the whole vibration absorber is reduced, the effective mass of the vibration absorber is increased and the working efficiency and the applicability are improved.

The invention discloses a miniaturized high-sensitivity piezoelectric microphone, and belongs to the field of MEMS piezoelectric devices. The piezoelectric microphone provided by the invention comprises a substrate with a back cavity and a piezoelectric cantilever beam fixed on the substrate, the piezoelectric cantilever beam comprises a fixed end fixedly connected with the substrate and a free end connected with the fixed end and suspended above the back cavity, the free end is provided with a mass block for reducing the resonant frequency of the piezoelectric cantilever beam, and the resonant frequency of the device is reduced to a proper range by adjusting the parameters of the mass block. By arranging the mass block at the free end of the cantilever beam, the resonant frequency of thedevice can be effectively reduced, the output voltage is improved, and the sensitivity of the microphone is maintained when the area of the microphone is reduced. Meanwhile, an electric signal is ledout from the fixed frame through a piezoelectric lamination layer for connecting the cantilever beam and the fixed frame; furthermore, a plurality of microphones are arrayed, output electric signals can be remarkably enhanced through series connection, and output impedance of microphone components can be reduced through parallel connection.

The invention relates to a self-repairing MXene / polyurethane thermoelectric composite material and a preparation method thereof. A pretreated loofah sponge fiber skeleton and MXene are hybridized to form a three-dimensional mutual lap joint network structure, the network structure and self-repairing microcapsules are implanted in the polymerization process of polyurethane, and the prepared composite material has a high seebeck coefficient, a high thermoelectric figure of merit and good mechanical properties. The self-repairing microcapsules are used as a functional material, so that automaticresponse to damage and self-repairing of a conductive network can be realized. The composite material can be applied to a conductive composite material, an elastic conductor or a thermoelectric material.

A protective headgear having an axial rotation control and bracing system, a head and neck linking system and impact safety warning system made for a single player. The axial rotation control and bracing system is designed to reduce linear and axial rotation of the head and allow for bracing; a headgear with multiple embodiments. Constructed of energy absorbent material to dissipate and transfer excessive impact energy to the torso of the player. A headgear which links the head and neck to improve effective mass thereby reducing head acceleration to minimize transfer of force and mechanical effect on the brain. A headgear having a non-removable electronic communication system designed for: measuring, collecting, monitoring, storing, interpreting and transmitting linear and rotational acceleration impact data. An impact safety warning system with pre-determined force threshold that when met or exceeded will identify and stop play so medical assessment can be conducted.

The invention discloses an Sb compound-based medium-short wave double-color infrared detector and a preparation method thereof, the structure of the Sb compound-based medium-short wave double-color infrared detector provided by the invention comprises a GaSb substrate and an epitaxial structure deposited on the GaSb substrate, the epitaxial structure comprises a Te doped N-type GaSb buffer layer,a medium-wave infrared InAs / GaSb superlattice N-type layer, a medium-wave infrared InAs / GaSb superlattice unintentionally doped absorption layer, a medium-wave infrared InAs / GaSb superlattice P-type layer, a short-wave infrared GaSb body material P-type layer, a short-wave infrared GaSb body material unintentionally doped absorption layer and a short-wave infrared GaSb body material N-type layer.According to the invention, an NIPPIN type back-to-back double-diode structure is adopted, so that short-wave infrared and medium-wave infrared can be respectively detected through bias modulation. The absorption coefficient can be improved by adopting the two absorption layers with the thickness larger than or equal to 1.5 microns, so that the quantum efficiency and the detection rate are improved, and the detector is simple in structure, simple in preparation process, high in repeatability, low in cost and beneficial to large-scale production.

The invention relates to the field of fuel-cell catalyst, in particular discloses a nickel palladium / silicon microchannel catalyst. The preparation thereof is as follows: the step of electroless plating deposit of a nickel palladium membrane is carried out on a silicon microchannel frame, and a nickel palladium / silicon microchannel composite material is processed by rapid annealing for 6 to 10 minutes at the temperature from 300 to 500 DEG C under the argon atmosphere. The nickel palladium / silicon microchannel catalyst can be used for preparing the electrode of the integratable direct methanol fuel cell.

A protective headgear having an axial rotation control and bracing system, a head and neck linking system and impact safety warning system made for a single player. The axial rotation control and bracing system is designed to reduce linear and axial rotation of the head and allow for bracing; a headgear with multiple embodiments. Constructed of energy absorbent material to dissipate and transfer excessive impact energy to the torso of the player. A headgear which links the head and neck to improve effective mass thereby reducing head acceleration to minimize transfer of force and mechanical effect on the brain. A headgear having a non-removable electronic communication system designed for: measuring, collecting, monitoring, storing, interpreting and transmitting linear and rotational acceleration impact data. An impact safety warning system with pre-determined force threshold that when met or exceeded will identify and stop play so medical assessment can be conducted.

The invention provides an automobile extrusion type SCR denitration catalyst with good low temperature activity. The catalyst comprises the following components in parts by weight: 100 parts of titanium tungsten powder, 1-3 parts of active promotion aids, 2-7 parts of hydroxypropyl methyl cellulose, 1-5 parts of polyoxyethylene, 2-5 parts of oleic acid, 1-6 parts of a glass fiber, 2-10 parts of ethylene glycol, 2-5 parts of lactic acid, 15-35 parts of a catalyst precursor solution, 2-6 parts of cholamine, 1-10 parts of silica sol, 4-10 parts of ammonia water and 1-16 parts of deionized water.The automobile extrusion type SCR denitration catalyst provided by the invention has remarkable advantages, the extrusion type catalyst is an active material as a whole, has a relatively large effective mass and excellent durability, and is remarkable in low temperature activity effect due to addition of the active aids; meanwhile, to meet identical emission standards, the amount of materials of the extrusion type catalyst is smaller than that of a coating catalyst, so that the raw materials can be saved, and the production cost can be reduced.

The invention discloses a secondary charging method of a mono-crystal furnace and belongs to the field of preparation of monocrystalline silicon. The secondary charging method disclosed by the invention comprises the following steps: step ST1, a preparation phase; step ST2, a positioning phase of a secondary charging device; step ST3, a jog charging phase; step ST4, a secondary charging device taking-out phase. By adopting the secondary charging method of the mono-crystal furnace, a function of adding raw materials at any time in a process of drawing a monocrystalline silicon rod by the mono-crystal furnace is mainly realized.

The present invention pertains to the art of Chinese medicine products and provides a Chinese medicine for treating female barrenness due to the suppression of ovulation, mainly comprising ginseng, hominis placenta, angelica, codonopsis pilosula, wolfberry and epimedium. After being prepared, the combination synergy effect of all the drugs can adjust female endocrine disorders, improve body immunity and luteal function, facilitate follicle formation, eliminate polycystic ovary, prevent more follicles ovulation, optimize the fertilized egg in the innate and avoid the occurrence of abortion and fetal malformation. Compared with a traditional method, the invention treats both symptom and root cause of the disease, improves ovulation rate, pregnancy rate and fertility rate, has no side effect and protects female health.

The invention belongs to the technical field of new energy thermoelectric conversion materials, and particularly relates to a light flexible and high-thermoelectric-conversion-efficiency composite thermoelectric material taking common cellulose paper as a substrate and a preparation method of the composite thermoelectric material. According to the preparation method, carbon nanotubes dispersed bya surfactant are used as a molecular template, and 1T-phase tungsten disulfide nanosheets with metalloid properties are grown on the surfaces of the carbon nanotubes through a concise and efficient hydrothermal synthesis method, so that 1T-phase tungsten disulfide nanosheet / carbon nanotube composite powder is obtained. The novel cellulose paper-based 1T-phase tungsten disulfide / carbon nanotube composite thermoelectric material is obtained by taking common cellulose paper with high water absorption as a substrate material and combining a roller press calendering and chemical doping method. According to the prepared composite thermoelectric material, the flexibility of the cellulose paper is reserved, meanwhile, the characteristics of all components of the composite material are combined, the excellent thermoelectric performance is obtained, and a new thought and direction are developed for development and application of high-performance thermoelectric materials in the field of new energy.

Cajones or cajon drums include a variety of improvements over existing cajones. Improvements include improved rigidity of sides other than a side containing a striking surface to prevent loss of volume, a vent hole located on a same side as the striking surface, the use of layers of maple to provide the striking surface, the use of added masses on the striking surface to modify the fundamental frequency of the striking surface, the use of a receptacle containing small metal (copper or silver) items to provide a snare effect, internal dimensions of the cajon chosen to match resonant frequencies of a selected style of music, and the use of damping materials in the cajones to modify the tone.

The invention provides a barrier enhanced homotype heterojunction type II superlattice long / long wave double-color infrared detector. The infrared detector comprises a buffer layer, a P-type first ohmic contact layer, a P-type first long wave absorption layer, a P-type hole barrier layer, a P-type second long wave absorption layer and a P-type second ohmic contact layer which are sequentially epitaxially grown on a substrate, and the P-type first long-wave absorption layer and the P-type second long-wave absorption layer respectively form homotype doped heterojunctions with the P-type hole barrier layer. According to the structure disclosed by the invention, a bicolor detection function in a long wave band is realized through bias voltage modulation, and the structure is simple, through introduction of a homotype doped heterojunction and a single-barrier structure, compared with a traditional two-color detector of an NPPN structure, the two-color detector has the advantages that a space electric field in a long-wave absorption region is greatly reduced, composite dark current and tunneling dark current generated in the absorption region are effectively inhibited, and the signal-to-noise ratio and the detection rate of the device are improved.

For solving the problem of NOx removal of motor vehicle exhaust emission, the invention discloses a vehicle-use high-mesh-number extrusive-type SCR denitration catalyst and a preparation method thereof. The denitration catalyst is prepared with titanium tungsten powder as a main raw material with addition of hydroxypropyl methyl cellulose, polyoxyethylene, oleic acid, chemical fibers, [gamma]-aluminum oxide, ethylene glycol, lactic acid, a catalyst precursor solution, ethanol amine, [gamma]-aluminum oxide, silica sol, ammonium water and deionized water. The preparation method includes the steps of kneading the components, pugging the mixture, aging the mixture, performing extrusive shaping, and drying and sintering the mixture to produce the honeycomb-like extrusive-type SCR denitration catalyst. The catalyst has high catalytic activity, high mesh number and high mechanical strength.

The invention discloses an integrated caseless ammunition gun system. The system comprises a caseless ammunition, and a barrel and a bolt which are matched with each other, wherein the caseless ammunition comprises a bullet body with the inner diameter being consistent with that of the barrel; a warhead cone and a gun propellant column are formed in the bullet body; a bottom fire platform and two burners are formed in the bottom of the bullet body; the bottom fire platform is connected with the gun propellant column; a positioning bullet retreating groove is machined on the outer side of the bullet body. A bore with a sliding chute inside is formed in the bore barrel; a positioning sliding block combination which can be matched with the positioning bullet retreating groove is arranged in the sliding chute; a bullet retreating sliding chute which can ensure that the caseless ammunition is retreated from the bore is formed in the bore. The bolt comprises a bolt body and a bullet pushing slope arranged on the bolt body, wherein an elastic bullet grasping hook matched with the positioning bullet retreating groove is arranged on the bolt body; an elastic sliding block is arranged on the elastic bullet grasping hook. The system adopts the caseless ammunition, does not have the risk of spontaneous combustion, is accurate in positioning, has spinning capacity during shooting, and solves problems of positioning, releasing and shooting of an integrated caseless ammunition. The bore barrel and the bolt can simplify the system structure, and reduce the manufacture cost and improve the reliability.

The invention discloses a semiconductor device as well as application and a manufacturing method thereof. The semiconductor device comprises a substrate, a channel layer arranged on the substrate, a potential barrier layer arranged on the channel layer, a first gallium nitride layer which is arranged on the barrier layer and covers the barrier layer, a second gallium nitride layer which is arranged on the first gallium nitride layer, a third gallium nitride layer which is arranged on the second gallium nitride layer, a first drain electrode which is arranged on the third gallium nitride layer, a first source electrode which is arranged on the third gallium nitride layer, and a first grid electrode which is arranged on the barrier layer; a concave part is formed between the first source electrode and the first drain electrode; the first grid electrode covers the concave part; the first source electrode and the first drain electrode are close to the top of the concave part; the second gallium nitride layer and the third gallium nitride layer are located between the source electrode and the barrier layer and between the drain electrode and the barrier layer. According to the semiconductor device provided by the invention, the quality of the integrated semiconductor device can be improved.

The invention relates to a confinedly-assembled thermoelectric composite material and a preparation method thereof. The method comprises the following steps: mixing loofah sponge fibers with an alkaline solution and an aqueous solution of an oxidant 1 in sequence; after treatment, washing the loofah sponge fibers with water until the loofah sponge fibers are neutral and carrying out drying; then adding the loofah sponge fibers into an aqueous solution of a pyrrole monomer; then adding a morphology control agent, an oxidizing agent 2, a complexing agent and PEDOT: PSS and a dispersant thereof,carrying out a hydrothermal reaction and irradiation treatment at the same time to obtain conductive loofah sponge fibers; fully mixing the conductive loofah sponge fibers with a liquid high-molecularpolymer precursor under ultrasonic treatment and vacuumizing treatment conditions; and carrying out heating and heat-preserved curing to obtain the confinedly-assembled thermoelectric composite material. The material disclosed by the invention has a relatively high seebeck coefficient and a thermoelectric figure of merit; polypyrrole generated in situ and the added PEDOT: PSS have synergistic effect, so the conductivity and mechanical properties of the material can be remarkably improved; and the composite material is relatively low in thermal conductivity and has very good thermoelectric properties.

An II type superlattice photoelectric detector possessing an absorption enhancement structure and a manufacturing method thereof are disclosed. The manufacturing method comprises the following steps of carrying out molecular-beam epitaxial growth on a substrate so as to form an absorption enhancement layer; carrying out molecular-beam epitaxial growth on an upper surface of the absorption enhancement layer so as to form an absorption layer, wherein the absorption layer is an N structure II type superlattice structure; and completing manufacturing of the II type superlattice photoelectric detector possessing the absorption enhancement structure. In the invention, through adopting an N structure II type superlattice material as the absorption layer and simultaneously introducing the absorption enhancement layer, a device can acquire 80% of high quantum efficiency at a target wave length position and a good narrow bandwidth characteristic is embodied nearby a target wave length.

Cajones or cajon drums include a variety of improvements over existing cajones. Improvements include improved rigidity of sides other than a side containing a striking surface to prevent loss of volume, a vent hole located on a same side as the striking surface, the use of layers of maple to provide the striking surface, the use of added masses on the striking surface to modify the fundamental frequency of the striking surface, the use of a receptacle containing small metal (copper or silver) items to provide a snare effect, internal dimensions of the cajon chosen to match resonant frequencies of a selected style of music, and the use of damping materials in the cajones to modify the tone.

The invention discloses a micro-single-shell resonator. The resonator comprises a packaging shell cover, a micro-single-shell harmonic oscillator, plane electrodes, and a composite structure substrate with a plurality of conductive through holes; the micro-single-shell harmonic oscillator is composed of a single shell and a single-ended column located at the position of a central axis inside the single shell; the bottom of the single-ended column is flush with the edge bottom of the single shell; the bottom of the single-ended column is connected to a conductive through hole in the composite structure substrate and led out through the conductive through hole through a conductive adhesion layer; the composite structure substrate is provided with the plane electrodes and the plane electrodes are led out through the conductive through holes below the plane electrodes; the conductive through holes are led out through a conductive leading-out layer at the back side of the composite structure substrate; and the packaging shell cover and the composite structure substrate with the plurality of through holes are packaged to form a vacuum space and a gas-absorbing agent is placed therein. According to the invention, the micro-single-shell resonator is provided with the plane electrodes, and the parasitic capacitance between the electrodes is reduced substantially; and the plane electrodes are conductively led out through the conductive through holes from the back side of the composite structure substrate.

The invention discloses an integrated caseless ammunition gun system. The system comprises a caseless ammunition, and a barrel and a bolt which are matched with each other, wherein the caseless ammunition comprises a bullet body with the inner diameter being consistent with that of the barrel; a warhead cone and a gun propellant column are formed in the bullet body; a bottom fire platform and two burners are formed in the bottom of the bullet body; the bottom fire platform is connected with the gun propellant column; a positioning bullet retreating groove is machined on the outer side of the bullet body. A bore with a sliding chute inside is formed in the bore barrel; a positioning sliding block combination which can be matched with the positioning bullet retreating groove is arranged in the sliding chute; a bullet retreating sliding chute which can ensure that the caseless ammunition is retreated from the bore is formed in the bore. The bolt comprises a bolt body and a bullet pushing slope arranged on the bolt body, wherein an elastic bullet grasping hook matched with the positioning bullet retreating groove is arranged on the bolt body; an elastic sliding block is arranged on the elastic bullet grasping hook. The system adopts the caseless ammunition, does not have the risk of spontaneous combustion, is accurate in positioning, has spinning capacity during shooting, and solves problems of positioning, releasing and shooting of an integrated caseless ammunition. The bore barrel and the bolt can simplify the system structure, and reduce the manufacture cost and improve the reliability.

An oxygen-enriched vacancy type black phosphorus quantum dot / bismuth oxycarbonate visible light catalyst, preparation method and application, the nano-flaky bismuth oxycarbonate is heat-treated and then dispersed in an ethanol solution, then the black phosphorus quantum dot solution is added, and after ultrasonic uniformity, the The microwave reaction is carried out at a power of 500-800 W to obtain an oxygen-rich vacancy type black phosphorus quantum dot / bismuth oxycarbonate visible light catalyst. The oxygen-enriched vacancy type black phosphorus quantum dots / bismuth oxycarbonate prepared by the invention can effectively remove NO from ambient air pollutants under visible light irradiation, the synthesis method is simple, fast and low in cost, and the black phosphorus quantum dots are evenly loaded, and have the advantages of good application prospects.

The invention provides an ultra-fast and low-cost method for preparing Half-Heusler bulk thermoelectric materials. The specific steps are: 1) According to the general formula ABX of the Half-Heusler compound, weigh A powder according to the stoichiometric ratio of 1:1:1 , B powder, and Activated sintering (PAS) produces high-performance Half-Heusler bulk thermoelectric materials. The present invention uses combustion synthesis reaction combined with plasma activation sintering process (PAS) to prepare high-performance Half-Heusler bulk thermoelectric materials within 15 minutes. It has the advantages of short preparation time, low energy consumption, simple process, low equipment requirements and repeatability. Good, suitable for large-scale production and other advantages.

The invention provides a novel preparation method of a high-performance continuous ZIF-8 (zero insert force-8) film for the high-performance separation and purification of gas, and mainly aims at solving the combination problem among a continuous even growth film, a film and a carrier of the ZIF-8 film. The preparation method is mainly characterized by comprising the following steps of: previously introducing growth point and a combination point on the surface of a porous carrier to form a thin layer of zinc oxide coating layer taken as a finished film, and growing in an inducing way to form the continuous even ZIF-8 film. An active point of the film homogeneous nucleation is introduced, the combination force problem between the film and the surface of the carrier is solved, and the surface of the carrier is modified by the coating layer, so that the high-quality film can be preferably formed. Compared with the conventional preparation method of the ZIF-8 film, the novel method adopted by the invention not only is high in film-forming effective mass, simple in process, and convenient for large-scale preparation and amplification, so that the method has a potential application prospect and a wide application value.

The invention belongs to the field of new materials, and in particular relates to a preparation method of a metal organic framework MOF-2 polycrystalline film. The method is to dissolve terephthalic acid in a mixed solvent of ethanol and water to make a saturated solution, take the zinc sheet as the anode and provide the zinc source of the MOF-2 material at the same time, take the zinc sheet or other inert electrodes as the cathode, and immerse in the The metal organic framework MOF-2 polycrystalline film can be obtained on the anode zinc sheet in the above saturated solution, and a DC voltage is applied. The invention solves the problems of continuous and uniform growth and film formation of the MOF-2 polycrystalline film and the bonding between the film and the carrier. The synthesized MOF-2 polycrystalline film has continuous layers, uniform grain size, and no defects. Compared with other MOF-2 polycrystalline film preparation methods, the present invention not only has high film effective quality, but also has simple process, short time and fast production process. It has good stability, is suitable for large-scale industrial production, and has a good application prospect.

The present invention pertains to the art of Chinese medicine products and provides a Chinese medicine for treating female barrenness due to the suppression of ovulation, mainly comprising ginseng, hominis placenta, angelica, codonopsis pilosula, wolfberry and epimedium. After being prepared, the combination synergy effect of all the drugs can adjust female endocrine disorders, improve body immunity and luteal function, facilitate follicle formation, eliminate polycystic ovary, prevent more follicles ovulation, optimize the fertilized egg in the innate and avoid the occurrence of abortion andfetal malformation. Compared with a traditional method, the invention treats both symptom and root cause of the disease, improves ovulation rate, pregnancy rate and fertility rate, has no side effectand protects female health.

The invention discloses a large-mass test part mounting device on a vibration centrifuge. An electric vibration table is arranged on a rotating arm of the vibration centrifuge, and one end of a test part is mounted on the face of the electric vibration table; an auxiliary expansion table is mounted on the rotating arm, one side face of the auxiliary expansion table is close to one side face of the test part, and a gap is reserved between the one side face of the auxiliary expansion table and one side face of the test part; a hydrostatic bearing is mounted on one side face of the auxiliary expansion table, a clamp is mounted on the other opposite side face of the hydrostatic bearing, and one side face of the test part is mounted on the clamp; the manner of combining the hydrostatic bearing and the auxiliary expansion table is adopted to bear gravity or centrifugal force borne by the test part, and the test part cannot be completely mounted on the face of the electric vibration table. The clamp, the hydrostatic bearing and the auxiliary expansion table are mounted on the rotary arm, the load capacity of the test part is obviously improved, and the effective quality of the test part and the whole test capacity of the vibration centrifuge can be obviously improved.