23 results about "Piezoelectric potential" patented technology

According to the antibacterial zirconia false tooth porcelain block material and the preparation method thereof, a piezoelectric ceramic material is added into the zirconia false tooth porcelain block material, and the piezoelectric discharge characteristic of the piezoelectric composite material is utilized, that is, in the daily food chewing process of a human body, the piezoelectric ceramic material can be used as a piezoelectric ceramic material; the piezoelectric potential generated by the periodic compression mechanical vibration of the zirconia false tooth material is catalyzed to generate reactive oxygen species (ROS) to kill bacteria, so that the false tooth achieves the bacteriostatic effect in the use process, and the bacteriostatic effect is stable and efficient; the technical problems that an existing antibacterial zirconia false tooth material is high in cost due to the fact that silver ions are used, and the sterilization performance is reduced after the antibacterial zirconia false tooth material is used are effectively solved.

The application provides a preparation method of a high-efficiency piezoelectric coating on a titanium implant surface. The preparation method of the application uses a hydrothermal treatment and an in-situ piezoelectric deposition technology to in-situ synthesize a nano strontium titanate-noble metal piezoelectric coating on the titanium implant surface. The coating can generate a piezoelectric potential and active oxygen through ultrasonic driving to degrade extracellular polymers and kill bacteria. In addition, the piezoelectric coating can also promote the osteogenic differentiation of bone marrow mesenchymal stem cells under piezoelectric stimulation, and finally realize the effects of bioactivity, long-acting drug-resistant bacteria and high-efficiency bone integration in the body. The application can provide a new surface treatment technology and research idea for controlling the drug-resistant bacteria infection on the implant surface, help to break through the limitations of the existing theory and technology in removing bacterial infection on the titanium implant surface, and provide beneficial guidance for the control of bacterial biofilm on other parts and the prevention and treatment of related infectious diseases.

This invention discloses a barium titanate composite cuprous oxide catalyst, its preparation method, and its application, belonging to the field of catalyst preparation technology. The preparation method of the barium titanate composite cuprous oxide catalyst includes: mixing BaTiO3 and Cu2O cubes at a mass ratio of 1:(0.1~0.4), adding them to an ethanol-water solution for composite formation, followed by filtration, washing, and vacuum drying. The composite catalyst is a heterostructure formed by BaTiO3 nanoparticles attached to the surface of Cu2O cubes. During the electrocatalytic reaction, simultaneous application of ultrasound results in a synergistic effect between the piezoelectric potential generated by BaTiO3 and the catalytic activity of Cu2O, which can efficiently promote nitrate adsorption activation and ammonia generation. Compared with existing technologies, this invention is the first to apply the piezoelectric-electrocatalytic synergistic mechanism to the field of electrocatalytic reduction of nitrogen-containing compounds, achieving an ammonia yield as high as 3370.38 μg·h⁻¹. ‑1 ·mg ‑1 With its excellent performance of 70.54% Faraday efficiency and simple, controllable, and low-cost preparation process, it provides a new route for the green synthesis of ammonia and has important industrial application prospects.

The invention discloses a piezoelectric catalysis tube forming process suitable for a water pressure self-excitation reaction, and particularly relates to the field of piezoelectric catalysis tube forming, and the piezoelectric catalysis tube forming process comprises the following steps: performing dispersion classification and fluid regulation on a piezoelectric composite material to generate preformed base material data with uniform frequency and stable fluid; a pressure effect sensitive path area and a flow velocity wall layer area are formed by adopting confinement flow channel segmentation and space positioning pressing treatment; based on limited pressure freezing treatment and heating stretching treatment, internal stress gradient distribution and structure stabilizing treatment are completed; a directional oscillation area and a manifold optimization area are formed by impressing, folding and pressing the piezoelectric catalysis tube. A micro-pressure-effect sensitive path, a flow velocity response enhanced wall layer and internal stress gradient distribution are constructed in the forming process of the piezoelectric catalytic tube, so that natural induction of local deformation and continuous piezoelectric potential generation under the hydrodynamic condition are realized, and the problem that catalytic reaction cannot be self-excited and continuous in a low-energy-consumption environment is solved.

This invention provides an antibacterial and repair-promoting piezoelectric film, its preparation method, and its application, belonging to the field of piezoelectric material technology. The method involves in-situ self-assembly of Fe-MOF on the surface of BTO, followed by further loading with DHA to synthesize an electrically controlled drug-release, antibacterial, and repair-promoting nanocomposite, BTO / Fe-MOF / DHA. BTO / Fe-MOF / DHA is then added to the surface of semi-cured PDMS to form an antibacterial and repair-promoting piezoelectric film, PDMS-BTO / Fe-MOF / DHA. When the PDMS-BTO / Fe-MOF / DHA piezoelectric film is subjected to ultrasonic stimulation, BTO converts mechanical energy into electrical energy, releasing Fe from the Fe-MOF... 3+ Reduced to Fe 2+ Fe-MOF degrades and releases DHA, and ultimately, Fe... 2+ Reacting with synchronously released DHA, it produces a large amount of toxic ROS, which damages proteins and nucleic acids, inducing bacterial death. The antibacterial and repair-promoting piezoelectric membrane of the present invention generates a piezoelectric potential during mechanical deformation caused by animal movement and induces EF at the wound site to promote wound healing. This antibacterial and repair-promoting piezoelectric membrane shows great potential in the future treatment of bacterial infected wounds.

The application discloses a triboelectric-piezoelectric hetero synapse transistor and a preparation method thereof. The triboelectric-piezoelectric hetero synapse transistor comprises, from bottom to top, a flexible / stretchable substrate layer, a source-drain electrode layer, a semiconductor layer, a piezoelectric ionic gel layer and a dielectric triboelectric layer. By integrating a triboelectric nanogenerator, a piezoelectric ionic gel and a synapse transistor, the triboelectric potential generated in the approaching process of an external object is used to induce the formation of a double electric layer of anions and cations in the ionic gel, and the piezoelectric potential generated in the pressing process is used to promote the reverse migration of the anions and cations, so as to realize the dynamic regulation of the carrier transport characteristics in the semiconductor. The output of excitatory or inhibitory postsynaptic current is adjusted through the "contact-pressing" process of the external environment.

The invention discloses a secondary water supply water tank outlet water pressure electro-catalysis purification device which is connected between a water tank outlet pipe and a lifting pump front pipe in series. The device main body is alternately provided with purification areas and slow flow reaction areas along the water flow direction, and the slow flow reaction areas are positioned between adjacent purification areas; and at least three sets of piezoelectric potential energy purification devices consisting of piezoelectric potential energy nets and piezoelectric purification units are fixed in each purification area. The piezoelectric potential energy net is provided with a potential energy titanium net protruding in the water flow direction and a piezoelectric node ball net fixed to a node. The piezoelectric purification unit comprises lead-free piezoelectric ceramics which are embedded and fixed in the meshes and are in direct contact with the water flow, a pressure contact rod for transmitting the impact force of the water flow to the ceramics, and a dowel bar. Water flow impacts and excites the lead-free piezoelectric ceramic to generate piezoelectric catalytic reaction, hydroxyl free radicals and superoxide free radicals are generated, and disinfection by-products are degraded. The device utilizes water flow kinetic energy for self-energizing purification, is non-toxic and efficient, does not change pipeline pressure, and is suitable for a secondary water supply system of a high-rise building.

The present application relates to process temperature measurement device manufacturing techniques and methods for calibration and data interpolation thereof. The present invention discloses a process condition measurement wafer assembly. In one embodiment, the process condition measurement wafer assembly includes a bottom substrate and a top substrate. In another embodiment, the process condition measurement wafer assembly includes one or more electronic components disposed on one or more printed circuit elements and interposed between the top and bottom substrates. In another embodiment, the process condition measurement wafer assembly includes one or more shielding layers formed between the bottom and top substrates. In one embodiment, the one or more shielding layers are configured to electromagnetically shield the one or more electronic components and diffuse a voltage potential across the bottom and top substrates.

The application discloses a kind of pipe catalytic reaction operation systems based on piezoelectric potential regulation, specifically relates to the field of piezoelectric potential regulation pipe catalytic reaction operation, including starting matching module, path generation module, diffusion modeling module, passage regulation module, efficiency optimization module;Starting matching module is based on catalytic medium original preparation parameter and flow shear environment initial setting parameter, extracts catalytic medium structure parameter and shear environment characteristic parameter, and filters the adaptive data combination that meets the requirement of piezoelectric potential preliminary excitation.Through in the condition without additional energy, based on the dynamic adaptation of catalytic medium and flow shear environment, the piezoelectric potential response is excited using fluid shear force and water pressure fluctuation, continuously induces free radical generation and migration, forms pollutant degradation passage, to realize the stable and continuous operation of pipe catalytic reaction, to solve the problem of insufficient continuous processing capacity in the prior art by relying on external excitation.

The invention discloses a glass through hole high-speed etching method based on laser-induced piezoelectric nano domain and chemical potential cooperative driving, which comprises the following steps: performing scanning modification on a glass substrate by adopting infrared-ultraviolet dual-band laser, and forming an oxygen vacancy concentration gradient in a modified area through time sequence regulation and control and gradient increase of power density along the thickness direction, constructing a chemical potential difference along the axial direction of the through hole; the modified glass substrate is immersed in Fe / HO composite catalytic etching liquid, an ultrasonic field is applied, the driving phase of the ultrasonic field and a pulse packet sequence of laser scanning are kept locked, the oxygen vacancy concentration gradient area generates a piezoelectric nano domain under the action of periodic stress, and the oxygen vacancy concentration gradient area generates a piezoelectric nano domain; the potential of the piezoelectric nano domain drives the active particles in the etching liquid to directionally migrate and react; and monitoring and maintaining the oxidation-reduction activity of the etching liquid in real time, and realizing anisotropic etching by utilizing the synergistic effect of the chemical potential difference and the piezoelectric potential until a through hole is formed.

This invention relates to a green and efficient Bi 13 S 18 The preparation method and application of Br2 belong to the field of piezoelectric catalysis technology. The method involves adding a bismuth salt solution to a mixed solution of a sulfur source and a bromine source, stirring at 80℃~130℃ for 4 h~7 h to carry out a co-precipitation reaction, and filtering, washing, drying, and grinding the resulting black precipitate to obtain Bi2. 13 S 18 Br2; the application is as an antibacterial functional material in marine antifouling coatings. The method is green and efficient, and is simple, low-cost, uses readily available raw materials, and is easy to produce. The application is based on the principle of piezoelectric effect, Bi... 13 S 18 Br2 possesses an intrinsic asymmetry that results in an internal dipole moment, which can effectively utilize external mechanical energy such as ocean wave energy to generate an internal piezoelectric potential. This leads to a piezoelectric catalytic reaction that produces reactive oxygen species. These reactive oxygen species kill marine bacteria and other fouling microorganisms, ultimately achieving the goal of marine antifouling.

The invention relates to the technical field of biomedical detection, and discloses a sputum pretreatment method for rapidly carrying out nucleic acid detection, and the method comprises the following steps: directly adding a dry intelligent infinitesimal into sputum; applying a low-frequency rotating magnetic field to drive infinitesimal spiral implantation; switching a high-frequency magnetic field to realize in-situ liquefaction and nucleic acid release by utilizing mechanical vibration and piezoelectric potential; adsorbing nucleic acid based on an electrowetting effect, and separating and eluting through a gradient magnetic field; and carrying out isothermal amplification detection on the purified nucleic acid. The intelligent asymmetric magnetoelectric coupling infinitesimal element is used as an execution medium, multiple effects of external dynamic magnetic field frequency modulation, coupling mechanical shearing, acoustic streaming capture and electric field breakdown are matched, physical viscosity reduction of the sample and efficient extraction of nucleic acid are achieved under the condition of no exogenous liquefying agent, dilution-free pretreatment of the high-viscosity sample is achieved, and the detection accuracy is improved. The detection sensitivity of low-abundance pathogens can be improved, and the inhibition of chemical reagents can be avoided.

The application discloses a piezoelectric catalytic pipe forming process suitable for water pressure self-excitation reaction and relates to the field of piezoelectric catalytic pipe forming, which comprises the following steps: generating preformed base material data with uniform frequency and stable liquid by dispersing and classifying piezoelectric composite materials and adjusting the liquid; adopting limited flow channel segmentation and space positioning pressing treatment to form piezoelectric sensitive path area and flow velocity wall layer area; completing internal stress gradient distribution and structure stability treatment based on limited pressure freezing treatment and heating stretching treatment; and forming directional oscillation area and flow shape optimization area by performing pressure imprint folding pressing on the piezoelectric catalytic pipe. Through the construction of micro piezoelectric sensitive path, flow velocity response enhanced wall layer and internal stress gradient distribution in the piezoelectric catalytic pipe forming process, natural induction local deformation and continuous piezoelectric potential generation under hydrodynamic conditions are realized, so that the problems that catalytic reaction cannot be self-excited and sustained in a low-energy consumption environment are solved.

The invention relates to a two-dimensional layered piezoelectric material, a preparation method thereof and application of the two-dimensional layered piezoelectric material in atom transfer radical polymerization, and belongs to the technical field of piezoelectric materials. The preparation method comprises the following steps: S1, dispersing few-layer molybdenum disulfide and polyvinylpyrrolidone in an organic solvent to obtain a few-layer molybdenum disulfide colloidal solution; s2, dispersing a metal precursor and thiourea in water, and standing to obtain a metal / thiourea complex solution; and S3, reacting the few-layer molybdenum disulfide colloidal solution with the metal / thiourea complex solution to obtain the two-dimensional layered piezoelectric material. Under the action of external mechanical force such as ultrasound, lattice distortion of the material can be induced to generate internal piezoelectric potential, and the generated piezoelectric potential directly drives a variable valence metal active center to generate reversible valence state conversion, so that a catalytic reaction is efficiently initiated, and further, the catalytic reaction efficiency is greatly improved under the condition that a consumable metal complex does not need to be additionally added as an activating agent. And an active / controllable atom transfer radical polymerization process is driven.

This invention discloses a bipolar transistor, its fabrication method, and a detection circuit, applicable to the field of transistor technology. Using a piezoelectric thin film as the n-type doped layer in the transistor, a bipolar transistor with an n-p-n structure is formed by two n-type piezoelectric layers sandwiching a p-type polymer. When any mechanical stress is applied to the top of the transistor, a charge is generated in the piezoelectric layer, polarizing the upper and lower surfaces of the piezoelectric layer, with opposite charges accumulating on different surfaces. Furthermore, due to the formation of two pn junctions, the passivation of free carriers amplifies the output signal, thereby enhancing the induced piezoelectric potential by applying pressure. This achieves a combination of sensing and energy harvesting functions in the bipolar transistor, allowing simultaneous energy harvesting during sensing operation without the need for external power supplies or signal amplification circuits.

The invention discloses an in-pipeline catalytic reaction operation system based on piezoelectric potential regulation and control, and particularly relates to the field of in-pipeline catalytic reaction operation based on piezoelectric potential regulation and control, the in-pipeline catalytic reaction operation system comprises an initial matching module, a path generation module, a diffusion modeling module, a path regulation and control module and an efficiency optimization module; the initial matching module extracts catalytic medium structure parameters and shear environment characteristic parameters based on catalytic medium original preparation parameters and flow shear environment initial setting parameters, and screens adaptive data combinations meeting piezoelectric potential preliminary excitation requirements. Under the condition of no external energy, based on dynamic adaptation of a catalytic medium and a flow shear environment, fluid shear force and water pressure pulsation are utilized to excite piezoelectric potential response, free radicals are continuously induced to generate and migrate, and a pollutant degradation passage is formed, so that stable and continuous operation of catalytic reaction in a pipeline is realized; the problems of dependence on external excitation and insufficient continuous processing capability in the prior art are solved.

This invention discloses a core-shell composite piezoelectric fiber material and its preparation method. The invention first prepares a core-shell composite nanofiber with PVDF-TrFE as the shell and PC as the core using a coaxial spinning process. Using PC as the core increases the elastic modulus of the composite piezoelectric fiber, resulting in a larger piezoelectric potential than pure PVDF-TrFE fibers under the same strain. Simultaneously, PC forms hydrogen bonds at the interface with PVDF-TrFE, increasing the crystallinity of the PVDF-TrFE shell and thus improving the piezoelectric properties. The core-shell composite piezoelectric fiber has a d... 33 The piezoelectric coefficient can reach 49.1 pC N. ‑1 It is 110% higher than that of pure PVDF-TrFE.

The invention discloses an antifouling coating material based on a piezoelectric super-hydrophobic effect as well as a preparation method and application of the antifouling coating material. The antifouling coating material comprises a coating matrix and modified particles, the coating matrix comprises an electret material with dielectric properties, and the modified particles are porous polymer microspheres with unsaturated conjugated electron withdrawing groups; the modified particles are exposed on the surface of the coating matrix to form a super-hydrophobic micro-nano structure, and can generate charge transfer under the mechanical action to generate a piezoelectric potential difference. By means of the synergistic effect of super-hydrophobicity and piezoelectricity, the antifouling coating shows excellent antifouling performance and has the piezoelectric property and the super-hydrophobicity, so that the coating is endowed with the antifouling capacity; the coating serves as an environment-friendly high-performance solution, the components of the film layer are simple, the preparation process is lower in difficulty and complexity, and large-scale application in the field of hydraulic equipment is better achieved.

This invention provides a method for copper-catalyzed Goldberg amination reactions involving piezoelectric materials driven by ball milling, belonging to the field of organic synthesis technology. The mechanical force of ball milling induces the formation of a piezoelectric potential on the surface of the piezoelectric material, which participates in the regulation of the oxidation state of the copper salt catalyst and the catalytic cycle, thereby activating aryl halides and nitrogen-containing nucleophiles. The entire reactant mixture reacts in a ball mill to obtain target products such as N-arylamines or N-arylamides. This invention combines piezoelectric materials with a copper catalytic system, enabling efficient C-N bond construction in copper-catalyzed Goldberg amination reactions under mechanical ball milling conditions without external heating and with little or no solvent. Experiments show that the reaction hardly occurs without the participation of piezoelectric materials, confirming the irreplaceable nature of piezoelectric materials. The method of this invention is mild, environmentally friendly, simple to operate, and has broad substrate applicability, making it suitable for the green construction of the skeletons of N-arylamines or N-arylamides in pharmaceutical, pesticide, and functional material molecules.

The embodiment of the invention provides a temporary substrate, a manufacturing method of the temporary substrate and a detection method of a light-emitting device, and the temporary substrate comprises a conductive substrate which comprises a conductive supporting part; the electrode assembly is arranged on the conductive supporting part, and the electrode assembly comprises a first electrode and a second electrode; and the piezoelectric layer is arranged on the electrode assembly, and the piezoelectric layer is arranged in a deformable manner, so that a potential difference can be generated between the first electrode and the second electrode. The first electrode and the second electrode are used for being connected with the light-emitting device, the piezoelectric layer is arranged in a deformable mode, so that when the piezoelectric layer deforms, potential difference is generated on the two sides of the piezoelectric layer, and in order to compensate piezoelectric potential, free charges move among the light-emitting device, the first electrode, the second electrode and the piezoelectric layer so as to lighten the light-emitting device. Therefore, the lighting detection of the light-emitting device on the temporary substrate can be realized.

This invention relates to a Bi4TaO8Cl@g-C3N4 composite nanomaterial, its preparation method, and its application. The method includes the following steps: BiOCl, Bi2O3, and Ta2O5 are pretreated by calcination; the pretreated BiOCl, Bi2O3, and Ta2O5 are then mixed; a molten salt additive is added and the mixture is homogeneously mixed before calcination; the calcined product is washed to obtain Bi4TaO8Cl nanosheets; g-C3N4 and Bi4TaO8Cl nanosheets are dispersed in water and ultrasonically composited to obtain the Bi4TaO8Cl@g-C3N4 composite nanomaterial. When the material of this invention is subjected to mechanical vibration and generates a piezoelectric potential, electrons and holes can be effectively separated under the action of an electric field and migrate in different directions, thereby significantly reducing the recombination rate of electrons and holes, allowing more charge carriers to participate in the catalytic reaction to generate H2O2, and greatly improving the catalytic efficiency.

The invention provides an S-type bismuth oxybromide / cesium tungsten bronze energy storage heterojunction as well as a preparation method and application thereof. The BiOBr / KxCs0.32-xWO3 S-type energy storage heterojunction is prepared by an electrostatic adsorption method of positive and negative charges generated by synergism of optical excitation and piezoelectric effect. The two piezoelectric crystals are compounded to enhance the piezoelectric response capability, the piezoelectric coefficient d33 of the piezoelectric crystals is increased to 56.27-79.92 nm * V <-1 >, and excitons can be formed on the interface of the piezoelectric crystals; the piezoelectric catalytic activity of the energy storage heterojunction is enhanced by enhanced redox piezoelectric potential and excitons formed on the interface. Under the synergistic effect of energy storage heterojunction enhanced redox piezoelectric potential, excitons formed on an interface, an energy storage heterojunction series polarization electric field and an interface S-type electric field, h < + >, e <->,. O < 2->, OH and < 1 > O < 2 > are formed to effectively degrade organic pollutants.

The application discloses a long-acting lubrication-corrosion integrated coating based on a friction-induced piezoelectric effect and a preparation method, and solves the bottleneck problem that the existing bonded solid lubricating coating is accelerated to deteriorate in tribological performance under a salt spray corrosion environment and is insufficient in long-acting service life. The specific technical scheme is as follows: polyamide-imide (PAI) is used as a matrix to construct a polyamide-imide / polyvinylidene fluoride (PVDF) binary composite resin matrix, and barium titanate (BTO) piezoelectric nanoparticles and graphene which are surface-modified by a silane coupling agent are doped, and polytetrafluoroethylene (PTFE) microparticles are added. Through mechanical energy-electric energy conversion effect in a friction process, the BTO / PVDF composite phase generates a piezoelectric potential under the action of a contact stress, and a three-dimensional electric field network is formed in the coating, the electric field produces a directional repulsion effect on negative charged corrosion ions such as Cl⁻, and penetration of a corrosion medium is delayed.