33results 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.

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.

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 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.

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.

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.