492 results about "Thermoelectric materials" patented technology

The invention provides a power management chip high-low side driving signal time sequence optimization method and system. The method comprises the following steps: acquiring temperature data of a power management chip under a switch switching transient working condition through an infrared thermal imaging technology, and synchronously acquiring three-dimensional temperature field distribution of junction temperatures on the surface and inside a packaging layer; based on the space continuity of a temperature field, extracting the temperature change characteristics of a power device area, converting the temperature gradient into Seebeck voltage by using a thermoelectric material embedded in a hot spot area, and constructing a dynamic thermoelectric feedback network; according to Seebeck voltage data, a coupling relation between hot carrier concentration and driving signal phase deviation is established, and disturbance of hot carrier mobility change on MOSFET switching delay is quantified; the rising / falling edge slope of the grid voltage is adjusted based on the coupling relation, the phase deviation caused by the hot carrier effect is eliminated through dynamic compensation, and the switching performance is optimized. The dynamic response precision of the power management chip is improved.

The invention relates to a non-equimolar-ratio high-entropy thermoelectric ceramic and a preparation method thereof. The chemical formula of the non-equimolar-ratio high-entropy thermoelectric ceramic is (Ca1 / 3Sr1 / 3Ba1 / 3) 1-xLaxTiO3 (x = 0.1-0.4). Through presintering, spark plasma sintering and reduction annealing processes, a single-phase perovskite structure composed of phases of the A-site high-entropy perovskite thermoelectric ceramic is obtained, equiaxed crystal grains are arranged in the ceramic, and the morphology of the equiaxed crystal grains is matched with that of cubic perovskite structure crystal grains. Elements Ca, Sr, Ba, La, Ti and O in the ceramic are uniformly distributed in the ceramic, and no agglomeration phenomenon exists. The A-bit non-equimolar-ratio high-entropy perovskite thermoelectric ceramic (Ca1 / 3Sr1 / 3Ba1 / 3) 1-xLaxTiO3 obtained by the invention has low thermal conductivity, high conductivity and Seebeck coefficient, further shows a high thermoelectric ZT figure of merit, is simple to operate and short in time period, and provides an effective path for preparing high-temperature thermoelectric materials.

The invention discloses a notebook computer waste heat recycling system and method based on a thermoelectric conversion effect, and relates to the technical field of thermoelectric materials and devices, and the system comprises a distributed thermoelectric array module which is composed of a plurality of miniature TEG units, is distributed in a high heating area of a notebook computer, and directly generates power through temperature difference; the self-adaptive heat management module comprises a heat-conducting silica gel layer and micro heat dissipation fins and is used for optimizing the temperature difference between the hot end and the cold end; the multi-stage electric energy management module comprises a rectifying circuit, a DC-DC boosting chip and a recycling energy storage battery device, converts the unstable low-voltage direct current output by the TEG into stable electric energy, stores the stable electric energy and supplies the stable electric energy to target equipment; and the intelligent control module dynamically adjusts the working area of the micro thermoelectric power generation unit according to the data of the temperature sensor, preferentially selects the position with the maximum temperature difference to generate power, and matches the power supply demand through a PMIC chip. Efficient conversion and utilization of waste heat are realized through innovative design, the problem of low thermoelectric conversion efficiency in miniaturized equipment is solved, and energy conservation and environmental protection are realized.

The invention relates to an ionic redox couple thermoelectric cement-based composite material, the composite material comprises a cement matrix and redox couples, and the redox couples exist in pores of the cement matrix; wherein the redox pairs are K4 [Fe (CN) 6] and K3 [Fe (CN) 6], and the porosity of the cement matrix is 25%-50%. According to the invention, the migration of ions in a cement matrix is regulated and controlled by introducing the redox couple, so that a relatively high Seebeck coefficient, conductivity and power factor are achieved while good mechanical properties are maintained, and the thermoelectric conversion efficiency is remarkably improved. Besides, the composite material can drive electrode reaction through temperature difference to generate a closed current loop, stable current output is achieved, and the problem of current output of a traditional ionic thermoelectric material is solved.

The invention relates to an application of a quaternary ammonium salt polymer in a thermoelectric material. The structural formula of the quaternary ammonium salt polymer is as shown in formula I in the specification. According to the preparation method, the quaternary ammonium salt cationic polymer can be used as a dispersing agent to be applied to dispersion of the carbon nanotubes, and the carbon nanotube dispersion liquid with relatively good stability can be obtained by adjusting the ratio of the dispersing agent to the carbon nanotubes, so that the problem that the carbon nanotubes are easy to agglomerate in the dispersion process is greatly solved; therefore, the carbon nanotube film with high thermoelectric performance is prepared, and the thermoelectric performance of the carbon nanotube is effectively improved. # imgabs0 #

The invention discloses a photovoltaic-photothermal-thermoelectric coupling system capable of efficiently utilizing sunlight. The system comprises a photovoltaic power generation module, a photo-thermal module and a thermoelectric power generation module, the photovoltaic power generation module is located on the upper layer of the whole system and is composed of a light condensation layer and a photoelectric conversion layer, and the photoelectric conversion layer converts photons in solar energy into electric energy through a photovoltaic cell; the photo-thermal module captures low-energy photons in sunlight through a heat absorption material, converts photon energy which cannot be utilized by a photovoltaic cell into heat energy through infrared radiation, and provides heat energy for the thermoelectric power generation module through heat conduction; and the thermoelectric power generation module is closely connected with the photo-thermal module, absorbs heat generated by the photovoltaic power generation module and the photo-thermal module and converts the heat into electric energy, and the thermoelectric material of the thermoelectric power generation module is a magnesium-based thermoelectric material. The problems of low energy conversion efficiency and high cost in the existing photovoltaic technology can be effectively solved, the utilization rate of solar energy is improved, and the method has remarkable application value in the field of renewable energy utilization.

A solid-state electronic miniature clock featuring a multi-layered silicon chip. A first circuit layer includes an electron paramagnetic resonance sensor, while the second layer comprises a silicon substrate with an etched trench housing single atom-doped fullerene molecules. Magnets are strategically placed on the silicon substrate and a third circuit layer to establish a baseline magnetic field. The chip incorporates through silicon vias (TSVs) filled with copper, forming a copper coil for enhanced antenna performance. Thermal management is achieved through vacuum cavities for isolation, strategically placed metals for heat generation, and thermo-electric materials, such as a bilayer of Bi$_2$Te$_3$ and Bi$_2$Se$_3$, for temperature regulation. A feedback loop monitors and adjusts the temperature, ensuring stability. Fabrication techniques include Deep Reactive Ion Etching (DRIE), electrochemical deposition, and photolithographic patterning, providing precise control over the chip's structure and functionality.

A fast response platinum resistor temperature sensor comprises a sensor housing, a measuring end of the sensor housing is provided with a sensor element, the sensor element comprises a ceramic cylinder, a front end of the ceramic cylinder is provided with packaging ceramic, the packaging ceramic is provided with a plurality of through holes, a rear end of the ceramic cylinder is provided with heat conduction ceramic, and the heat conduction ceramic is provided with a plurality of through holes. A temperature measuring platinum wire is arranged at the upper end of the interior of the ceramic cylinder and connected with a platinum resistor lead, a thermoelectric material wire is arranged at the lower end of the interior of the ceramic cylinder, the front end of the thermoelectric material wire is welded with a leading-out wire to form a second hot junction, and the rear end of the thermoelectric material wire is welded with another leading-out wire to form a first hot junction. The lead-out wire penetrates through a through hole in the packaging ceramic, the platinum resistor lead is connected with a platinum resistor signal lead arranged in the sensor shell, the lead-out wire is connected with a thermoelectric material wire signal lead, the platinum resistor signal lead and the thermoelectric material wire signal lead are fixedly connected with a sensor junction box, and the sensor shell is filled with an insulating material.

The invention discloses an Ag2Se-based thermoelectric material and a preparation method thereof, and belongs to the technical field of thermoelectric materials. The preparation method comprises the steps that Ag powder and Se powder are mixed and ground according to the molar ratio of (1.9-2.1): 1, and mixed powder is obtained; the mixed powder is subjected to cold pressing to form blocks, and prefabricated blocks are obtained; the prefabricated block is subjected to heat preservation for 20-120 minutes under the conditions that the pressure is 1-5 GPa and the temperature is 400-1000 DEG C, and an Ag2Se initial product is generated through reaction; crushing the primary product, and grinding into fine powder; and sintering the fine powder for 5-30 minutes under the conditions that the pressure is 1-5 GPa and the temperature is 300-900 DEG C, so as to obtain the composite material. The sample is prepared through high temperature and high pressure for the first time, the method is simple, operation is easy to control, the preparation period can be greatly shortened, and the energy utilization rate is increased; the electroacoustic transport performance of Ag2Se is effectively regulated and controlled by changing the pressure and the temperature, and finally the thermoelectric performance is effectively improved.

The invention relates to a textured KCu7S4 thermoelectric material and a preparation method thereof, and the method comprises the steps: sequentially adding a prepared KOH aqueous solution, CuCl2. 2H2O and Na2S. 9H2O into a high-pressure kettle, and fully stirring for dissolving; dropwise adding an N2H4.H2O aqueous solution into the mixed solution, fully stirring, sealing, transferring to a microwave chemical synthesis instrument, heating, keeping stirring, and reacting at a target temperature and self-generated pressure to generate a KCu7S4 nanowire preferentially growing along a [001] crystal orientation; and after the reaction is finished and natural cooling is carried out, a product is collected through centrifugation, full cleaning and vacuum drying are carried out, and then the KCu7S4 thermoelectric material with [001] preferred orientation in the direction perpendicular to the pressure direction is obtained through spark plasma sintering. According to the method, a surfactant and an organic solvent are not used, and macro, rapid, efficient and controllable preparation of the KCu7S4 nanowire is realized through a low-temperature, low-cost and low-energy-consumption microwave-assisted hydrothermal process.

The invention relates to a self-powered energy-storage temperature-adjusting concrete wall and a management and control method and a manufacturing method thereof, and solves the problem that in the prior art, application of a phase-change material and a thermoelectric material is mostly independently designed, collaborative optimization of the phase-change material and the thermoelectric material cannot be achieved, and consequently the utilization efficiency of solar energy is low. A plurality of through pipelines are arranged inside; the thermoelectric phase change material is poured into the pipeline of the hollow frame, the thermoelectric phase change material is ionic thermoelectric phase change hydrogel, and the thermoelectric phase change material comprises at least two gel components with different phase change temperatures so as to form temperature gradient regulation and control; the thermoelectric function structure comprises N-type thermoelectric materials and P-type thermoelectric materials which are arranged on the outer surface of the hollow frame or form a hollow frame body, and the N-type thermoelectric materials and the P-type thermoelectric materials are alternately arranged and are connected in series through electrodes to form a closed thermoelectric loop. The system has the following effects that efficient utilization of solar energy is achieved, energy storage, temperature adjustment and self-power supply functions are integrated, and the energy-saving effect of a building is remarkably improved.

The invention provides a thermoelectric driving fiber-based organic electrochemical synapse transistor and a preparation method and application thereof, and the thermoelectric driving fiber-based organic electrochemical synapse transistor is composed of a thermoelectric energy supply device, a fiber-based organic electrochemical synapse transistor and wires for connecting all parts. The thermoelectric energy supply device comprises a P-type thermoelectric fiber and an N-type thermoelectric material, and the fiber-based organic electrochemical synaptic transistor comprises a source-drain fiber electrode, a grid fiber electrode and an ionic gel electrolyte. According to the thermoelectric energy supply device prepared based on the Seebeck effect, conversion from heat energy of the human body to electric energy can be achieved, and stable energy supply to the synaptic transistor can be achieved. The integration of the thermoelectric energy supply device and the fiber-based organic electrochemical synaptic transistor has a wide application prospect in the fields of medical treatment, intelligent materials and wearable equipment.

The invention belongs to the technical field of thermoelectricity, and relates to a preparation method and application of a quasi-solid thermoelectric material capable of realizing humidity stability by means of phase separation regulation, the preparation method comprises the following steps: dissolving a negatively charged hydrophilic monomer, an electrically neutral monomer, a cross-linking agent and a photoinitiator in a solvent to obtain a precursor solution, and carrying out an ultraviolet polymerization reaction to form polyelectrolyte gel; mixing the eutectic solvent with an electrolyte aqueous solution containing redox ion pairs and lithium chloride to obtain a quaternary electrolyte system; and immersing the gel into a quaternary electrolyte system, and fully replacing the internal solution through a diffusion effect to obtain the quasi-solid thermoelectric material with stable humidity. The thermoelectric material has the advantages of excellent Seebeck coefficient, good stability, high mechanical strength, large power density and the like, can supply power to wearable electronic products in an actual humidity fluctuation environment, breaks through the main bottleneck of actual application of quasi-solid ionic thermoelectric materials based on ionized water gel, and is wide in application prospect.

The invention discloses a contact type thermoelectric device and a preparation process thereof, and belongs to the technical field of thermoelectric conversion device manufacturing. The contact type thermoelectric device mainly comprises a hot end part, a positioning compression piece, a thermoelectric material and a cold end part. The preparation process of the contact type thermoelectric device mainly comprises the steps of preparation of a hot end part, preparation of a thermoelectric material part, preparation of a cold end part, design and preparation of a positioning compression part, overall preparation of the contact type thermoelectric device and assembly of a thermoelectric power generation system containing the contact type thermoelectric device. According to the contact type thermoelectric device, the electrode of the device hot end part and the thermoelectric material are in pressure contact, welding flux is omitted, a traditional welding process is replaced, and the service temperature of the thermoelectric device is greatly increased. According to the preparation process of the contact type thermoelectric device, the thermoelectric device is prevented from being in the environments of overhigh welding temperature, non-uniform heating and the like for a long time in the preparation process, and the performance degradation of the thermoelectric material is reduced.

An electromagnetic wave detector includes a heat-absorbing layer, an insulating film, a two-dimensional material layer, and a first electrode portion. The heat-absorbing layer includes a thermoelectric material layer and a phase-transition material layer. The insulating film is disposed on part of the heat-absorbing layer. The two-dimensional material layer is disposed on the heat-absorbing layer and the insulating film and is electrically connected to the heat-absorbing layer. The first electrode portion is disposed on the insulating film and is electrically connected to the heat-absorbing layer with the two-dimensional material layer in between.

The invention provides a cubic tin selenide-based thermoelectric crystal and a preparation method thereof, and relates to the technical field of crystal synthesis. The preparation method comprises the following steps: weighing tin, silver, antimony and selenium simple substances, putting into a first container, vacuumizing and sealing; raising the temperature of the first container to 953-1373K, and keeping the temperature for 15-30 hours; taking out the alloy ingot after cooling, putting the alloy ingot into a second container, vacuumizing and sealing; and heating the second container to 973-1373K, carrying out heat preservation for 5-30h, cooling the second container to 923-1173K at a first cooling rate, cooling the second container to 873-923K at a second cooling rate, and cooling the second container to room temperature at a third cooling rate. The blocky cubic tin selenide single crystal material is prepared, the extremely high grain orientation degree is achieved, and the high-performance thermoelectric material can be obtained.

The invention relates to the technical field of new energy, and discloses a sea layer gradient energy capturing raft which comprises a raft type wave energy conversion device, a photovoltaic module and a seawater temperature difference power generation module. The raft type wave energy conversion device comprises an anti-corrosion raft body, a hydraulic system and a generator, the raft body is a flat box type hollow floater, and the hydraulic system and the generator are installed at the position of a middle hinge shaft. According to the photovoltaic assembly, a flexible thin-film solar cell can be selected as a photovoltaic panel, the surface of the photovoltaic panel is covered with a salt-mist-resistant nano coating, and the photovoltaic panel is installed on the surface of the raft body in a curved surface attaching mode. The seawater thermoelectric power generation module comprises a heat exchanger, a condenser and a working medium circulating pipeline, and thermoelectric materials are driven to generate power through temperature difference. Through the vertically layered wave-photovoltaic-temperature difference three-state cooperative capture design, the intermittent limitation of a single energy source is broken through. The magnetic fluid direct power generation technology is adopted for the wave energy module, traditional hydraulic transmission is replaced, and the energy conversion efficiency is greatly improved.

The invention provides a thermoelectric device analysis method considering the variable-temperature elastic-plastic mechanical property of a thermoelectric material, and the method comprises the steps: firstly obtaining a real variable-temperature mechanical property curve of the thermoelectric material in a set temperature range through a performance experiment test, and carrying out the fitting to obtain a variable-temperature damage model of the thermoelectric material; then establishing a thermoelectric device model in finite element software, and defining material attributes of each component; carrying out bearing performance simulation on the hot arm component to obtain a stress-strain response simulation curve; comparing the stress-strain response simulation curve with the real variable-temperature mechanical property curve, and judging whether the finite element simulation process is accurate or not; thermal field boundary conditions and load boundary conditions of all components of the thermoelectric device are set, design parameters are adjusted, the bearing performance and damage of the adjusted thermoelectric device are analyzed, and the thermoelectric device configuration with the optimal performance is selected. According to the method, the real mechanical response of the thermoelectric material in a high-temperature and high-load service environment is considered, and the structure optimization design of the thermoelectric device is realized.

The invention discloses a photovoltaic energy storage and cooling coupled system and method based on a copper-based composite phase change material. A power generation module, a cooling energy storage module, an energy conversion module and the like are included. In the daytime, the solar photovoltaic panel emits heat, and the copper-based composite phase change material absorbs heat, stores energy and cools the photovoltaic panel; at night, the phase change material releases heat, and the thermoelectric material converts heat energy into electric energy. The system uses a DDPG algorithm of deep reinforcement learning to optimize operation. The state space comprises parameters such as the temperature of the solar photovoltaic panel and the temperature of the phase-change material, and the action space relates to operations such as control of cooling energy storage and energy conversion. The reward function is designed in multiple aspects of comprehensive efficiency, energy storage, electric energy output and stability. By constructing a strategy network and a value network, the system can make decisions according to environmental changes. And extracting data from the experience playback buffer area to update network parameters so as to enable the system to perform self-adaptive adjustment. The system not only solves the problems of high temperature of the photovoltaic panel and power generation at night, but also improves the energy utilization efficiency by using an algorithm, and the performance is far better than that of a traditional photovoltaic system.

The invention discloses a Sb / Mn / Ge co-doped tin telluride-based thermoelectric material and a preparation method and application thereof, the molecular formula of the Sb / Mn / Ge co-doped tin telluride-based thermoelectric material is Sn < 1.01-x-y > Sb < 0.04 > MnxGeyTe, x is more than or equal to 0.04 and less than or equal to 0.08, and y is more than or equal to 0 and less than or equal to 0.10. The preparation method comprises the following steps: weighing raw materials Sn, Te, Sb, Mn and Ge, grinding, mixing, transferring into a carbon-plated quartz tube, and performing vacuum sealing; carrying out a melting reaction on the carbon-plated quartz tube, and quenching after the reaction is finished to obtain a cast ingot; and grinding into powder, loading into a mold, sintering by discharge plasma, and relieving pressure and cooling. The invention discloses application of the thermoelectric material in a medium-high temperature thermoelectric power generation device for industrial waste heat recovery. The raw materials are non-toxic and environment-friendly, the carrier concentration is reduced through Sn compensation, meanwhile, the energy difference between light and heavy valence bands is reduced through Sb / Mn / Ge co-doping, and the energy band degeneracy and the state density effective quality are improved.

The invention belongs to the technical field of intelligent wearing, and particularly relates to a hollow-structure S-shaped electrode flexible wearable thermoelectric device and a preparation method and application thereof. The invention discloses a hollow-structure S-shaped electrode flexible wearable thermoelectric device array which can be self-powered, and belongs to the field of intelligent wearing. Comprising a miniature temperature monitoring array component and a local temperature adjusting array component. Each of the miniature temperature monitoring array component and the local temperature adjusting array component is composed of a self-designed block thermoelectric arm, a flexible insulation heat insulation substrate layer, a flexible insulation heat conduction covering layer, an elastic wire, a flexible electrode and the like. The thermoelectric arm is made of a block-shaped thermoelectric material pressed by a self-designed die. The array component has a hollow structure, so that the thermoelectric performance is improved. The elastic wire is an S-shaped elastic wire. According to the flexible wearable thermoelectric device array, a new method is provided for realizing synchronous temperature monitoring and regulation under the condition of self power supply and meeting the local thermal comfort requirement.

The invention discloses a cold and hot type portable glove with adjustable joint motion range, which belongs to the technical field of medical instruments and structurally comprises a glove body, a double-layer elastic body and a heat insulation coating layer are arranged on the surface of the hand back side of the glove body, and a thermoelectric material layer and a heat transfer coating layer are arranged on the surface of the palm side of the glove body; a temperature sensor which can be in direct contact with a hand is arranged in the glove body; the double-layer elastomers are arranged at finger joints and wrist joints and comprise a lower-layer non-phase-change elastomer and an upper-layer liquid-gas phase-change elastomer, a temperature-controllable resistance wire is embedded in the liquid-gas phase-change elastomer, the resistance wire is heated to enable the liquid-gas phase-change elastomer to generate shape change and the double-layer elastomers to generate bending deformation, and the motion range of the joints is adjusted; the thermoelectric material layers are arranged at non-finger joints and non-wrist joints, and the thermoelectric material layers achieve refrigeration or heating based on the Peltier effect. The cold and hot type portable glove is high in integration level, good in portability and wide in application prospect.

The copper-based composite phase change material photovoltaic energy storage and cooling coupled system and method covers power generation, cooling energy storage, energy conversion and other modules. During the day, the solar photovoltaic panel generates heat, the copper-based composite phase change material absorbs heat and stores energy and cools the photovoltaic panel; at night, the phase change material releases heat, and the thermoelectric material converts thermal energy into electrical energy. The system uses the DDPG algorithm of deep reinforcement learning to optimize operation. The state space includes solar photovoltaic panel temperature, phase change material temperature and other parameters, and the action space involves controlling cooling energy storage, energy conversion and other operations. The reward function is designed from multiple aspects such as efficiency, energy storage, power output and stability. By constructing a policy network and a value network, the system can make decisions according to environmental changes. Data is extracted from the experience replay buffer to update network parameters, allowing the system to adaptively adjust. The system not only solves the problem of high temperature of photovoltaic panels and night power generation, but also uses algorithms to improve energy utilization efficiency, which is far superior to traditional photovoltaic systems in performance.

The invention relates to the technical field of semiconductor crystal materials, and provides a low-thermal-conductivity Mg-Ag-Sb ternary compound single crystal material and a preparation method thereof. The preparation method comprises the following steps: a raw material weighing step: weighing Mg, Ag, Sb and Bi raw materials according to a set stoichiometric ratio; a packaging step: packaging the raw materials weighed in the raw material weighing step into a packaging container; a single crystal growth step: placing the packaging container in a temperature control device for temperature control, completely melting the raw materials in the packaging container to form a melt, then cooling the melt, forming a crystal blank in the melt, and growing the crystal blank into a single crystal; and a centrifugation step: the temperature of the melt in the packaging container is reduced to a set range, the packaging container is placed in centrifugal equipment for centrifugal treatment, single crystals in the melt are separated, and the Mg-Ag-Sb ternary compound single crystal thermoelectric material is obtained. The preparation method is high in controllability, and the prepared material is high in purity and uniformity and extremely low in heat conductivity.

The invention discloses an ultra-precision polishing method for a thermoelectric material. The ultra-precision polishing method comprises the steps that S1, mechanical grinding and rough polishing are conducted on a thermoelectric material block through abrasive paper; wherein the abrasive paper sequentially uses metallographic abrasive paper with the abrasive particle mesh number from small to large; s2, diamond polishing paste or polishing liquid, CeO2 polishing liquid and Al2O3 polishing paste or polishing liquid are used as grinding materials, and mechanical polishing and fine polishing are carried out on the thermoelectric material block after mechanical grinding and rough polishing on a polishing machine; and S3, an alkaline SiO2 polishing solution or a water-based diamond polishing solution is used as a polishing medium, the thermoelectric material block subjected to mechanical polishing is subjected to repeated fine polishing and mechanochemical polishing on a polishing machine, and the thermoelectric material subjected to ultra-precision polishing is obtained. The surface roughness of the thermoelectric material obtained by the method does not exceed 1nm.

The invention discloses a method for preparing a Bi2Te3 thermoelectric material EBSD sample through ion grinding. The specific method comprises the following steps: cutting a Bi2Te3 material by adopting a linear cutting technology to obtain a sample with a proper size, inlaying, grinding and polishing, and ultrasonically cleaning to remove surface impurities; the method comprises the following steps: horizontally placing a sample on an objective table, closing a cabin door, opening a mechanical pump to vacuumize to 0.01 pa, and rotating the angle of the sample table until the included angle between the ion beam jet direction and the normal direction of the surface of the sample is 85-88 degrees; the argon flow is set to be 1.5 mL / min; turning on a main circuit switch, adjusting the acceleration voltage to 2kv, setting the grinding time to be 15-20 minutes, starting an ion gun switch, opening a plate valve after the current is stabilized at 350-400uA, starting grinding, and rotating the sample table. And after grinding is finished, resetting the acceleration voltage to be 4kv, grinding again, taking out the sample, and carrying out EBSD observation.

The invention discloses a high-performance PbTe-PbS thermoelectric material and a charge balance doping preparation method thereof, and relates to the technical field of thermoelectric materials, Pb particles, Sb particles, Te blocks, S sheets and Ag strips are respectively weighed according to the molar ratio of 0.95: 0.033: 0.9: 0.1: 0.008 and then are loaded into a quartz tube for vacuum tube sealing, and the high-performance PbTe-PbS thermoelectric material is obtained through box-type furnace sintering, cold water quenching, box-type furnace annealing, cold water quenching and rapid hot pressing furnace sintering in sequence. The Sb, S and Ag co-doped PbTe thermoelectric material is obtained. According to the method, a Pb vacancy and an Ag gap are introduced through charge balance doping of Sb2Te3 to dynamically regulate and control chemical potential, the problems of PbS precipitation and carrier transport blocking of an n-type high-concentration doped PbTe-PbS material system are solved, the wide-temperature-range thermoelectric figure of merit of the small-bandwidth PbTe-PbS thermoelectric material is greatly improved, the process is stable and can be scaled, and technical support is provided for commercialization of PbTe-based thermoelectric devices.

The invention provides an ocean thermoelectric material testing method and an ocean thermoelectric material testing device. The method comprises the following steps: acquiring a t-th temperature parameter and a plurality of t-th gain adjustment parameters of a phase change material at a t-th moment; based on a predicted temperature change model, a (t + 1) th temperature parameter of the phase change material is calculated according to the t-th temperature parameter, and the predicted temperature change model is constructed according to a thermal hysteresis effect model, a nonlinear response model and a temperature sequential control model of the phase change material; for each gain adjustment parameter, calculating a (t + 1) th gain adjustment parameter according to the first temperature change parameter and the tth gain adjustment parameter; based on a temperature calibration model, according to the plurality of (t + 1) th gain adjustment parameters, the second temperature change parameter and the target power of the ocean thermoelectric material testing device, generating a (t + 1) th temperature control power instruction at the (t + 1) th moment; and in response to the (t + 1) th temperature control instruction, outputting (t + 1) th temperature control power to perform temperature adjustment on the phase change material.

The application belongs to the technical field of thermoelectric materials, and provides a preparation method of a beta-SrZrS3 thermoelectric conversion bulk material, which comprises the following steps: subjecting SrZrO3 powder to a sulfuration reaction to obtain beta-SrZrS3 powder; and subjecting the beta-SrZrS3 powder to rapid hot-press sintering to obtain the beta-SrZrS3 thermoelectric conversion bulk material. The preparation method has the advantages of low cost, simplicity and rapidness, can realize batch synthesis of SrZrS3 bulk materials, shorten the synthesis period, and obtain the beta-SrZrS3 thermoelectric conversion bulk material with pure phase, uniform composition distribution and high density. The raw material used is SrZrO3 powder which is inexpensive, non-toxic and does not require inert storage environment. The vacuum tube furnace and the rapid hot-press furnace are used, the sulfuration reaction and the hot-press sintering are used for preparation, and since the raw material, the preparation process and the target product meet the requirements of environmental friendliness, the preparation method can be directly extended to the development of the application of perovskite sulfide thermoelectric conversion, and provides a new way for the development of a new thermoelectric system.

The present invention provides a horizontal thermoelectric conversion element having a thermoelectric temperature modulation performance that can be on par with that obtained through the conventional Peltier effect, in comparison. The present invention is provided with: a first electrode and a second electrode which are disposed so as to face each other; and a laminate which is held between the first and the second electrodes and which is electrically connected to both the first and second electrodes. The laminate has a structure in which layers of a first thermoelectric material and layers of a second thermoelectric material are alternately laminated, and the value of at least one of Peltier coefficient, electrical conductivity, or thermal conductivity is different between the first thermoelectric material and the second thermoelectric material. At least one of the first and second thermoelectric materials exhibits a vertical magnetic thermoelectric effect or a horizontal magnetic thermoelectric effect. The laminate surfaces of the first layers and the second layers are inclined with respect to the direction in which the first electrode and the second electrode face each other. By having a current supplied between the first and second electrodes and having a magnetic field applied in a direction in which the magnetic thermoelectric effect is to be generated, a temperature difference is generated in a direction perpendicular to the current.