32results about How to "With piezoelectric effect" patented technology

The invention relates to a piezoelectric element. The piezoelectric element comprises a polymer layer, a first metal layer and a second metal layer, wherein the polymer layer is made of pyrolytic polyacrylonitrile; the first metal layer is arranged on one surface of the polymer layer; the second metal layer are arranged on the other surface of the polymer layer; and the first metal layer and the second metal layer have different work functions. The invention also relates to a preparation method of the piezoelectric element. The piezoelectric element can be applied to the fields of pressure sensors and the like.

The embodiment of the invention discloses a preparation method of a PbZr0.52Ti0.48O3 intelligent coating. The preparation method comprises the following steps: forming an insulating layer on the surface of a substrate; forming a PbZr0.52Ti0.48O3 sensing layer on the surface of the insulating layer; carrying out polarization treatment on the PbZr0.52Ti0.48O3 sensing layer, so as to lead the PbZr0.52Ti0.48O3 sensing layer has piezoelectric effect. The acquired PbZr0.52Ti0.48O3 sensing layer has the function of a piezoelectric sensor, and is capable of monitoring and feeding back the abrasion status of the substrate surface in real time, so that the sensor needs not to be adhered, thereby the problem that the degree of adhesion between the sensor and the substrate is poor is avoided; and moreover, the insulating layer is provided between the PbZr0.52Ti0.48O3 sensing layer and the substrate, and a piezoelectric signal generated by the PbZr0.52Ti0.48O3 sensing layer to the substrate surface abrasion is very weak, thus the the piezoelectric signal generated by the PbZr0.52Ti0.48O3 sensing layer can be prevented from entering the substrate by insulating layer, thereby the piezoelectric signal loss by the substrate is avoided, the acquiring capability for the piezoelectric signal is enhanced, and the sensitivity for real-time monitoring and feeding back the abrasion status of the substrate surface is improved.

The invention relates to the field of conductive materials, in particular to a transparent conductive film having a piezoelectric effect and a preparation method thereof. The transparent conductive film comprises a base film and a nano silver conductive layer and an OC protective layer which are sequentially coated on the surface of the base film, and the raw materials of the nano silver conductive layer include silver nanowires, an adhesive, a leveling agent, a surfactant, and an antioxidant and ultrapure water; the OC protective layer comprises acrylic resin, a photoinitiator, a leveling agent, SiO2 nanoparticles and an organic solvent. The silver nanowires are taken as raw materials for preparation of the conductive layer, the silver nanowires can reduce the conductive resistance valueof the conductive film and can improve the wear resistance and bending property. The conductive layer is coated with the OC protective layer to facilitate improvement of the transmittance of the conductive film, the SiO2 nanoparticles are added in the OC protective layer to allow the OC protective layer to have a piezoelectric effect. The conductive film is high in bending resistance, low in square resistance and long in service life while having the piezoelectric effect.

The invention discloses an absorbable orthopedic instrument material capable of prompting growth of bone tissues and a preparation method thereof. The material is prepared by compounding a medical absorbable high-molecular polymer, a degradable pure magnesium or magnesium alloy which is loaded with BaTiO3 piezoelectric ceramics, can conduct piezoelectric signals and serves as a conductive carrier material, and grapheme for improving the electric polarization effect. When the absorbable orthopedic instrument material is in use, an electric signal produced by the piezoelectric ceramics under the action of an external load can be effectively conducted to organism tissues around an orthopedic instrument by the conductive carrier material to stimulate the growth of early hard tissues at a bone injury position and promote healing of the bone tissues. The BaTiO3 piezoelectric ceramics is loaded on the conductive carrier material through a dual loading technology consisting of electrophoresis-micro-arc oxidation and sol sealing, coating and film forming. Meanwhile, the conductive carrier material and the grapheme can also enhance the polarization effect and stress sensitivity of the piezoelectric ceramics. A bar material or a plate material is prepared firstly by means of a thermal die pressing, extruding or pulling method, and the orthopedic instrument is made by means of polarization and machining.

The invention relates to an absorbable orthopedic instrument material with a piezoelectric effect and a preparation method thereof. The orthopedic instrument is formed by compounding a medical absorbable high polymer, biological piezoelectric ceramic particles dispersed and distributed in the polymer, and a degradable conductive material which transmits a piezoelectric signal. In the using process, the piezoelectric signal generated by the biological piezoelectric ceramic particles dispersed and distributed in the polymer can be effectively transmitted to the body tissues around the orthopedic instrument by the conductive material, namely a pure magnesium or magnesium alloy wire or plate, near the biological piezoelectric ceramics in the polymer under the action of an external load, the formed electrical stimulation signal can accelerate fracture healing, and the absorbable orthopedic instrument material can be in different structural forms such as bone nails and bone lamellas and is wide in application prospects.

The invention discloses a waste gas exhaust device for a high-rise building water heater, which comprises a water heater body and a smoke exhaust pipe. The water heater body is respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively sealed and connected with an air inlet pipe. and the outlet pipe, the exhaust pipe is sealed and slidably connected with a push plate, the end of the outlet pipe away from the water heater body is sealed and connected with the push plate, the push plate is rotatably connected with an impeller, and the connection between the smoke exhaust pipe and the push plate A chute is opened at the place, and the chute is connected with an annular piezoelectric ring, and the two sides of the push plate are respectively provided with a fixed plate and a rotating plate. The advantage is that in the state of high external wind pressure, the push plate is pushed by the air pressure to make it contact with the piezoelectric ring and conduct the circuit, so that the piezoelectric ring charges the flat plate capacitor composed of the push plate and the fixed plate under the action of pressure And finally breakdown, under the action of instantaneous breakdown heat, push the push plate back, so as to discharge the waste and avoid causing safety problems.

The invention provides a ferrate piezoelectric catalytic porous ceramic material, a preparation method and an application thereof, the ceramic material comprises a porous ceramic matrix and catalyticunits with piezoelectric effect attached to the surface and the interior of the matrix, the catalytic units at least comprise ferrate, and the ferrate material comprises iron ions and positive trivalent cations. The ferrite piezoelectric catalytic porous ceramic material provided by the invention has the piezoelectric effect, and can efficiently degrade volatile organic compounds under the actionof wind energy, mechanical energy or sound wave energy. When used for an industrial pulse dust collector, the product can simultaneously remove dust and toxic and harmful gases. The activated carbon adsorbent is applied to an air purifier and an air conditioner, energy does not need to be additionally provided, secondary greenhouse gas emission is avoided, and the problem that activated carbon needs to be frequently replaced after adsorption saturation is achieved is solved. The material is stable in performance, reusable and low in cost, and the preparation method is simple, easy to implement, green and environmentally friendly.

The invention relates to a composite hemostatic repair material and a preparation method thereof. The hemostatic repair material uses shells and tourmaline as main raw materials, transforms shells and phosphorus sources into hydroxyapatite, and uses chitosan sponge as a matrix for loading . The preparation method uses shells and tourmaline as main raw materials, and uses ammonium hydrogen phosphate as a phosphorus source for hydrothermal reaction. The self-electric field on the surface of tourmaline has an attraction effect on charged ions in the system. The shell / tourmaline composite material is obtained by in-situ growth on the surface of the stone, and then the shell / tourmaline composite material is embedded in the chitosan sponge matrix through a freeze-drying process to prepare the shell / tourmaline composite hemostatic repair material. The hemostatic repair material can significantly shorten the coagulation time and achieve a good hemostatic effect.

The invention discloses a device comprising a packing box, electronic equipment and an electronic device. Holes are arranged on the packing box comprising a cavity structure so that sound generated by the electronic equipment can be transmitted to space outside the packing box when the electronic equipment is arranged in the packing box. Therefore, the technical scheme has the effects that the electronic equipment can be protected from being worn or damaged by external force by the packing box of the electronic equipment and also has the technical effects that sound transmission efficiency of the electronic equipment in sound playing can also be enhanced.

The invention discloses a method and device for advanced wastewater treatment with PVDF / ZnO piezoelectric ultrafiltration membrane coupled with advanced oxidation technology. Connect with AC power supply to provide transmembrane pressure in the form of vacuum, and at the same time turn on the ultraviolet lamps set on both sides of PVDF / ZnO piezoelectric ultrafiltration membrane; the wastewater is filtered through PVDF / ZnO piezoelectric ultrafiltration membrane, and ozone Oxidation, ultraviolet radiation, and photocatalytic oxidation are finally purified, and the PVDF / ZnO piezoelectric ultrafiltration membrane realizes self-cleaning effect under the action of AC power; this method overcomes that membrane filtration technology cannot effectively remove small molecule pollutants and advanced oxidation technology For the problem of ineffective oxidation of macromolecular pollutants, the two technologies are organically coupled and complement each other's advantages. At the same time, the piezoelectric effect of PVDF / ZnO piezoelectric ultrafiltration membrane is also used to effectively inhibit membrane fouling.

The invention provides an A60-level lightweight refractory deck composition, comprising at least one component A and component B, wherein the mass ratio of the component A to the component B is (1 to 6) to (1 to 8); the component A is neoprene latex; the component B is prepared from ordinary silicon 42.5 cement, large ceramsite, small ceramsite, large vermiculite and small vermiculite; the grain size of the large ceramsite is 2-5mm; the grain size of the small ceramsite is 0.5-2mm; the grain size of the large vermiculite is 2-4mm; the grain size of the small vermiculite is 0.2-2mm; and the component B contains the ingredients by weight ratio of 50-55% of ordinary silicon 42.5 cement, 20-25% of large ceramsite, 5-10% of small ceramsite, 14-20% of large vermiculite and 5-10% of small vermiculite. The A60-level lightweight refractory deck composition has good lightness, compressive property, fracture resistance and shock resistance, and can effectively prevent sound transmission and heat conduction; and the fire resistance can achieve A-60 level.

The invention discloses a dehumidification waterproof floor tile, which comprises a brick body, a plurality of flexible pedals are embedded on the upper surface of the brick body, the plurality of flexible pedals are arranged in a circular array, and piezoelectric ceramic plates are bonded and connected at the bottom. A liquid storage chamber is opened in the brick body and the bottom of the piezoelectric ceramic plate runs through the liquid storage chamber, and the top of the liquid storage chamber is provided with two liquid inlet holes, and the two liquid inlet holes are located on two symmetrical sides of the brick body. On the side, the bottom of the liquid storage chamber is provided with a liquid outlet and a pressure valve is sealingly connected to the liquid outlet, and the piezoelectric ceramic plate is electrically connected to a plurality of fixing plates, and each of the fixing plates is penetrated with a Each of the torsion shafts is fixedly connected with a blade, and the blades are opposed to a rubber ball, and the rubber ball is rotatably connected to the top of the liquid storage chamber through a connecting rod and a torsion spring. The advantage is that by accelerating the air velocity on the surface of the liquid, the evaporation rate of water is accelerated, and the effect of dehumidification and waterproof is achieved.

The invention provides a composite material suitable for the preparation of a fuel economizer. The composite material is characterized in that the composite material comprises the following components, by weight, 30-60 parts of a polymer material, 40-80 parts of tourmalinite, 10-40 parts of rare earth, 0.01-15 parts of nanometer titanium dioxide and 0.001-10 parts of nanometer platinum, wherein the polymer material is PC, PE, ABS, PS or PMMA. A spherical porous fuel economizer prepared by mixing the components and carrying out slurry injection molding through an injection molding method is also provided. The fuel economizer has the advantages of low cost, good fuel economizing effect, engine power improvement, no generation of secondary pollution, reduction of the engine sound, reduction of carbon deposition in an oil way, stable effect during use, and realization of recycling.

The invention discloses a piezoelectric semiconductor thin film polarization experimental device. The piezoelectric semiconductor thin film polarization experimental device comprises a cabinet body, the top part of which is provided with a left guiding column and a right guiding column along a vertical direction. The top part of the cabinet body between the left guiding column and the right guiding column is fixedly provided with a heating plate and a first motor. The rotating shaft of the first motor is vertically upwardly provided with external screws, and a quartz glass tube is disposed on the heating plate. A carrying plate is disposed on the quartz glass tube, and the rotating shaft of the first motor passes through the carrying plate, and is in a threaded connection with the carrying plate. The left end and the right end of the carrying plate are slidably connected with the left guiding column and the right guiding column. The bottom part of the carrying plate is fixedly provided with a polarization clamp. The safe and easy-to-operate piezoelectric semiconductor thin film polarization experimental device capable of realizing temperature variation is realized.

The invention discloses a dehumidification type waterproof floor tile, and the floor tile comprises a tile body; a plurality of flexible pedals are embedded in the upper surface of the tile body, theflexible pedals are arranged in an annular array mode, the bottoms of the flexible pedals are jointly connected with a piezoelectric ceramic plate in an attached mode, a liquid storage cavity is formed in the tile body, and the bottom of the piezoelectric ceramic plate penetrates through the liquid storage cavity; two liquid inlet holes are formed in the top of the liquid storage cavity in a penetrating mode, the two liquid inlet holes are located in the two symmetrical sides of the brick body, a liquid outlet is formed in the bottom of the liquid storage cavity, a pressure valve is connectedto the liquid outlet in a sealed mode, the piezoelectric ceramic plate is electrically connected with a plurality of fixed plates, and a torsion shaft is arranged in each fixed plate in a penetratingmode; each torsion shaft is fixedly connected with a blade, the blades abut against a rubber ball, and the rubber ball is rotationally connected with the top of the liquid storage cavity through a connecting rod and a torsion spring. The floor tile has the advantages that the evaporation speed of water is increased by increasing the air flow rate on the surface of liquid, and the dehumidificationand waterproof effects are achieved.

The invention discloses a lithium-sulfur battery composite positive electrode material. Graphene oxide is used as a matrix of the battery positive electrode material, a graphene / ferroelectric composite material is obtained after the graphene oxide and a ferroelectric material are compounded, and then the graphene / ferroelectric composite material is mixed with nano sulfur according to a mass ratio of 3:7 to prepare the lithium-sulfur battery composite positive electrode material; and the ferroelectric material is one of barium titanate, lead titanate, potassium niobate, strontium titanate, lithium niobate or lead zirconate titanate. According to the lithium-sulfur battery composite positive electrode material disclosed by the invention, excellent electrical conductivity and structural stability of the graphene oxide are utilized, and the graphene oxide is used as an excellent conductive network and the positive electrode matrix, so that electrical conductivity of the positive electrode material is improved; and by utilizing strong adsorption of ferroelectricity of the ferroelectric material on polar polysulfide, dissolution and shuttling of the polysulfide in electrolyte are inhibited, so that loss of active substances is reduced, coulombic efficiency of a lithium-sulfur battery is improved and a cycle life of the lithium-sulfur battery is prolonged.

The invention discloses a self-service intelligent breakfast machine which comprises a cabinet body, a controller, a display screen, an identification module, a power supply module, a temperature control system and a disinfection system, the cabinet body is provided with a plurality of breakfast storage cavities, box doors are correspondingly installed in the breakfast storage cavities, the box doors are connected with the breakfast storage cavities in a matched mode through electronic locks, and the electronic locks are connected with the controller. The display screen and the identificationmodule are both installed on the cabinet body, the display screen and the identification module are both connected with the controller, the temperature control system is installed in the cabinet body,the temperature control system is used for controlling the temperature in the cabinet body, and the temperature control system is connected with the controller; each breakfast storage cavity is divided into an inner storage cavity body and an outer storage cavity body for breakfast storage and taking, safety and sanitation of breakfast are guaranteed, the storage cavity is disinfected multiple times through the disinfection system, the inner storage cavity body is sealed through a baffle arranged on a sliding block, and therefore food can be stored more cleanly.