149 results about "Palladium alloy" patented technology

The invention provides a flexible palladium film hydrogen sensor and a preparation method thereof, the flexible palladium film hydrogen sensor is sequentially provided with a flexible substrate, a hydrogen sensitive sensing layer and a contact connection layer from bottom to top, and the contact connection layer is connected with a resistance measurement unit; and the hydrogen-sensitive sensing layer is a palladium or palladium alloy film with a conical micro-nano structure. The palladium or palladium alloy thin film with the conical micro-nano structure provides a hydrogen sensor conical surface micro-nano structure with a high specific surface area for the flexible palladium thin film hydrogen sensor, and the process that hydrogen is adsorbed, dissolved and diffused into the palladium or palladium alloy thin film is accelerated, so that the response speed of the sensor is increased; according to the hydrogen sensor, the flexible substrate is adopted, so that the hydrogen sensor can be conveniently arranged in various narrow spaces, and the applicability of the hydrogen sensor in various scenes is improved.

The invention discloses a high-conductivity palladium alloy for a chip test probe and a preparation method of the high-conductivity palladium alloy, and the palladium alloy comprises the following components in percentage by mass: 50-58% of Pd, 35-40% of Cu, 5-10% of Ag, 0.05-1.0% of Cr and 0.1-1.5% of auxiliary elements, the auxiliary element is selected from at least one of Al, Zn, In and Si; the resistivity of the palladium alloy is 8.0 mu omega.cm or below, the Vickers hardness is 450 HV or above, the 90-degree bending frequency is 8 or above, the tensile strength is 1500 MPa or above, and the ductility is 6% or above, the palladium alloy is subjected to pre-smelting and secondary smelting, and at least part of Cu and at least part of Cr in raw materials are mixed and pre-smelted to obtain a copper-chromium intermediate alloy; and the copper-chromium intermediate alloy and the remaining raw materials are mixed and then subjected to secondary smelting. The palladium alloy can meet the urgent requirements of probes in various forms on low resistance, high plasticity and toughness, fatigue resistance, mechanical strength and the like at the same time.

The invention relates to the technical field of chemical catalysis, in particular to a copper-silicon catalyzed cyclohexanol gradient dehydrogenation and hydrogen recycling method which comprises the following steps: step 1, preparing a gradient catalyst, namely carrying out surface hydroxyl regulation pretreatment on porous silica gel, and loading a copper salt solution by adopting a step-by-step impregnation method to form gradient distribution with gradually decreased copper loading capacity from outside to inside, carrying out segmented heating reduction in a reducing atmosphere containing 5vol% of H2 / N2; 2, gradient dehydrogenation reaction process control; and 3, hydrogen in-situ separation and cyclic utilization: separating hydrogen from the reaction outlet gas through a palladium alloy membrane, controlling the pressure difference of the two sides of the membrane to maintain the permeation flux, returning the separated hydrogen to the inlet of the reactor to adjust the hydrogen partial pressure, and storing the residual hydrogen. Through gradient catalyst preparation, accurate reaction process control and efficient hydrogen recovery technologies, the cyclohexanone production efficiency is improved, and long-term stability of the catalyst and efficient recycling of hydrogen are achieved.

The invention provides a metal film hydrogen sensor and a preparation method thereof. The sensor comprises a substrate structure, a measuring electrode and a hydrogen sensitive laminated structure which are sequentially arranged from bottom to top, the hydrogen sensitive laminated structure can be combined with hydrogen to change the resistance value of the hydrogen sensitive laminated structure, the hydrogen sensitive laminated structure at least comprises a hydrogen storage layer and a hydrogen adsorption diffusion layer, the hydrogen adsorption diffusion layer is arranged above the hydrogen storage layer, and the hydrogen adsorption diffusion layer is used for adsorbing the hydrogen and enabling the hydrogen to be diffused in the hydrogen adsorption diffusion layer; the measuring electrode is electrically connected with the hydrogen sensitive laminated structure. Compared with a traditional palladium alloy film, the hydrogen storage layer can remarkably improve the hydrogen storage capacity of the sensor, so that the resistance type hydrogen sensor has a wider dynamic response range, through structural design, three functions of the sensing unit are achieved through the two metal film layers respectively, and the application range of the resistance type hydrogen sensor is widened. Therefore, each layer of metal film is optimized, and the overall performance of the hydrogen sensor is improved.

The utility model relates to the field of waste gas purifiers, in particular to a waste gas purification device for hydrogen-oil-gas separation, which comprises a rectangular bottom plate, an oil-gas separation box is arranged on the bottom plate, a hydrogen purification tank is fixedly connected onto the bottom plate, and a filter box is fixedly connected onto the bottom plate. When the oil-gas separation device is used, oil can be separated through the oil-gas separation box, heavy oil flows out from the lower part of the oil-gas separation box through the oil outlet pipe, the first electromagnetic valve controls the oil to flow in the oil outlet pipe, and light waste gas enters the hydrogen purification tank from the first gas outlet pipe after being preliminarily filtered by the first filter screen; the palladium alloy separation pipe in the hydrogen purification tank is used for separating hydrogen in the waste gas, and the filter box is used for further filtering the waste gas after hydrogen purification, so that the filter effect is better, air pollution is avoided, and the hydrogen in the waste gas can be recycled.

The invention belongs to the technical field of precious metal electronic paste, and particularly relates to a preparation method and application of submicron spherical gold-platinum-palladium alloy powder used for being matched with low-temperature co-fired ceramics. The preparation method comprises the following steps: mixing a tetrachloroauric acid solution, a hexachloroplatinic acid solution and a tetrachloropalladium (II) acid solution to obtain a gold-platinum-palladium mixed solution; the gold-platinum-palladium mixed solution, the dispersing agent solution and the modified reducing agent solution are mixed for a second time, after a reduction reaction is conducted, static settlement and solid-liquid separation are conducted in sequence, obtained solids are washed and dried in sequence, and the obtained submicron spherical gold-platinum-palladium alloy powder used for being matched with the low-temperature co-fired ceramic has the advantages of being uniform in particle size, free of agglomeration, high in dispersity and the like. After low-temperature co-firing with a ceramic substrate, the substrate has the characteristics of flatness, no bubble, excellent weldability and soldering resistance, good batch stability and the like.

The invention discloses a flow compensation method and device for a palladium alloy film hydrogen sensor and a transmitter. The method comprises the steps that the response time tau, the actually-measured resistance change value delta Rmeas and the concentration measurement value Cmeas of the palladium alloy film hydrogen sensor for currently detecting to-be-detected gas are obtained; determining a current flow estimated value Qest of the to-be-detected gas according to the tau in combination with a pre-established flow-response time relation model; determining the ratio k of the delta Rmeas to the theoretical resistance change value delta Rturn corresponding to the concentration true value Cturn of the gas to be detected according to the Qest in combination with a pre-established flow-resistance change ratio relation model; and correcting the Cmeas according to the k, so as to obtain the Cturn. Therefore, the influence of the flow change of the to-be-measured gas on the concentration measurement value of the palladium alloy hydrogen sensor can be corrected based on the response time.

The invention is a system for producing pure hydrogen (E) from coal (A), characterized by; at least one combustion unit (10) configured to heat and burn the mentioned coal (a), at least one water injection unit (20) configured to spray water onto carbon monoxide (b) gas released from the burned coal (a) to initiate a Water-Gas shift reaction and obtain a mixture of carbon dioxide and hydrogen (c), at least one palladium alloy membrane (30) configured to separate hydrogen (e) from the mentioned mixture of carbon dioxide and hydrogen (c) while retaining carbon dioxide (d), providing high-purity hydrogen (e) gas through its high hydrogen permeability and selectivity properties, at least one methanol production unit (40) configured to convert carbon dioxide (d) separated by the mentioned palladium alloy membrane (30) and part of the obtained hydrogen (e) gas into methanol (f).

The invention relates to the field of power equipment safety monitoring, and discloses a thermal power plant generator hydrogen leakage on-line monitoring system and a detection method, and the system comprises a distributed solid palladium alloy sensor array, a multichannel impedance harmonic signal conditioning unit, an edge calculation processing terminal and an upper computer monitoring platform. The multi-channel impedance harmonic signal conditioning unit applies a composite alternating current excitation signal to the distributed solid palladium alloy sensor array; and the edge calculation processing terminal receives the digital voltage sampling data, calculates complex impedance spectrum characteristic parameters and nonlinear harmonic distortion coefficients, executes pure hydrogen locking discrimination and surface pollution correction, constructs a concentration gradient vector field and calculates space coordinates of a leakage source. Environmental interference is eliminated by analyzing nonlinear harmonic response, surface pollution influence is eliminated by using a complex impedance spectroscopy separation technology, a leakage position is inversed in combination with a countercurrent line tracking algorithm, and the problems that the generator hydrogen monitoring false alarm rate is high and positioning cannot be achieved are solved.

The invention discloses a supported porous organic polymer catalyst and application thereof in preparation of 2, 5-furandicarboxylic acid from 5-hydroxymethylfurfural, the supported porous organic polymer catalyst comprises a carrier and an active component supported on the carrier; the carrier is an aniline polymer; and the active component is a gold-palladium alloy. An amino-modified porous organic polymer loaded with a gold-palladium alloy is used as a catalyst to efficiently catalyze and oxidize 5-hydroxymethylfurfural to prepare 2, 5-furandicarboxylic acid. Compared with the method that strong oxidants such as KMnO4 and the like need to be used for metering and oxidizing HMF to obtain FDCA, the method adopts oxygen as the oxidant, so that the method is more environment-friendly and efficient; compared with the traditional heterogeneous catalysis which needs to add an alkali promoter, the method can realize catalytic oxidation under an alkali-free condition, and has the advantages of high reaction selectivity and long service life of the catalyst while ensuring high conversion rate.

The utility model relates to the technical field of connectors, and provides a conductive terminal, an electric connector with the conductive terminal and a mobile terminal. The conductive terminal comprises a metal substrate and a plating layer structure, the metal substrate comprises a contact area located at the front end, and the plating layer structure comprises a bottom plating layer, a first plating layer, a second plating layer, a third plating layer and a fourth plating layer, the first plating layer is a platinum plating layer or a platinum alloy plating layer, the second plating layer is a palladium plating layer or a palladium alloy plating layer, the third plating layer is a platinum plating layer or a platinum alloy plating layer, the fourth plating layer is a gold plating layer, and the first plating layer is only arranged on the bottom plating layer of the contact area or arranged on the whole bottom plating layer; the second plating layer completely covers the first plating layer; and the third plating layer and the fourth plating layer are only arranged in the contact area. The wear resistance and the corrosion resistance of the terminal are improved, the service life is prolonged, the electric contact performance of the terminal is improved, abnormity caused by poor contact is prevented, and the user experience is good.

The application discloses a preparation method of vanadium-doped and high-hydrated mangan-chromian spinel monocrystal under high temperature and high pressure. The cylindrical mangan-chromian spinel sample is prepared by taking solid rose triangular rhombic manganese carbonate crystal, solid chromium (III) acetate hydroxide crystalline powder, solid vanadium (IV) acetylacetonate oxide powder, solid oxalic acid powder, solid bixbyite powder, solid chromium hydroxide powder and liquid dilute nitric acid as starting raw materials; two pieces of water source sheets are made from the bixbyite powder and the chromium hydroxide powder with a weight ratio of 4:1; the two pieces of water source sheets are placed at two ends of the cylindrical mangan-chromian spinel sample and then are placed into a double-capsule structure experimental sample bin with an inner layer sleeve being a graphite tube and an outer layer sleeve being a gold-palladium alloy tube; the high temperature and high pressure reaction is carried out to obtain the mangan-chromian spinel monocrystal; and the preparation technology blank of the vanadium-doped and high-hydrated mangan-chromian spinel large-particle monocrystal under the current high temperature and high pressure conditions is solved.

The invention discloses a preparation method of a copper-palladium alloy loaded nano titanium dioxide semiconductor material as a catalyst for a carbon dioxide reduction reaction. Firstly, alloy nanoparticles are generated through a sol-gel method, the morphology of the nanoparticles is controlled and agglomeration is prevented through oleylamine and oleic acid, and borane-tert-butylamine is added at the temperature of 170 DEG C to regulate and control the sizes of the generated alloy nanoparticles. A series of characterizations prove that the catalyst has a very good particle loading condition, uniform particle distribution and increased reaction active sites, and shows excellent activity when being applied to a carbon dioxide reduction reaction, when the loading capacities of copper and palladium are respectively 1%, the activity of the obtained catalyst is the highest, the methane generation rate can reach 20.23 mol / g / h, and the methane generation rate can reach 20.23 mol / g / h. The selectivity of methane reaches 100%.

The invention discloses a preparation method of low-activity silver powder, which comprises the following steps: weighing a proper amount of dispersing agent, dissolving in deionized water to prepare a reaction base solution, uniformly mixing silver nitrate and deionized water to obtain an oxidizing agent solution, dissolving Vc in deionized water to obtain a reducing agent solution, dropwise adding the oxidizing agent solution and the reducing agent solution into the reaction base solution together, and stirring to obtain the low-activity silver powder. The preparation method comprises the following steps: adding an organic solvent into a reaction kettle until complete reaction, coating an organic matter with an obtained solution through a hydrothermal method, then centrifuging, washing and drying, crushing and dispersing the coated silver powder, and putting into a muffle furnace for high-temperature heat treatment to obtain the low-activity silver powder. The low-activity silver powder prepared through the method has the advantage of being low in activity, can be used for large-scale production of silver-palladium alloy and is applied to various fields.

The present invention discloses a test probe, comprising a test needle and a connecting needle shaft; the test needle is composed of a detection part and a connecting shaft part connected to the detection part, the connecting needle shaft comprises a first connecting member, the first end of the first connecting member is provided with a plug hole matching the connecting shaft part, the connecting shaft part is inserted into the plug hole to make the connecting shaft part and the connecting needle shaft conduct; the material of the test needle is palladium alloy. The test probe of the present invention can effectively reduce the manufacturing cost of the test probe, and is conducive to maintaining the contact stability between the test needle and the workpiece to be tested.

The invention discloses a high platinum group metal copper anode slime treatment method which comprises the following steps: placing high platinum group metal copper anode slime in dilute sulphuric acid, blowing air, heating, oxidizing and leaching copper and nickel in the high platinum group metal copper anode slime, and carrying out solid-liquid separation to obtain a first filtrate and a first filter cake; dispersing the first filter cake in dilute sulfuric acid, carrying out heating and pressurizing reaction in an oxygen atmosphere, dissolving out part of metal in the first filter cake, carrying out solid-liquid separation to obtain a second filtrate and a second filter cake, mixing the second filter cake, calcium oxide and coke powder, pressing into blocks, smelting at 1450-1550 DEG C for a set time, atomizing the smelted alloy to obtain fine particles, and recycling the fine particles. Gold-platinum-palladium alloy powder is obtained; and after the second filtrate is subjected to flash evaporation and rapid cooling, ferrous sulfate is added into the second filtrate for palladium precipitation, the filtrate obtained through filtering is sequentially subjected to the steps of silver precipitation and selenium and tellurium precipitation, thiourea is added into the remaining filtrate, a reaction is conducted at high temperature and high pressure, thiourea complex precipitation is generated, solid-liquid separation is conducted, third filtrate and a third filter cake are obtained, and platinum family concentrate is obtained.

The application discloses a kind of nano gold palladium alloy catalyst and its preparation method and application.In protective atmosphere, the mixed solution comprising gold precursor, palladium precursor, reducing agent and stabilizer is reduced and coprecipitation reaction, the reaction product obtained is calcined, and the nano gold palladium alloy catalyst is obtained.The catalyst is based on gold palladium mutual solution and causes electron structure reconstruction principle, adjusts gold palladium alloy peripheral electron cloud density, so as to change the adsorption of gold palladium alloy, and greatly improves the selectivity and catalytic activity of catalyst.The catalyst is used for electrocatalytic reduction CO2, and the selectivity of CO can reach more than 90%, which is much higher than that of commercial CO2 reduction catalyst, and has a wide application prospect in the field of "carbon neutralization".

Provided is a multilayer ceramic capacitor provided with an internal electrode capable of maintaining a relatively high coverage rate even when the multilayer ceramic capacitor is thinned. A laminated ceramic capacitor (1) is provided with a laminated body (2) having: a plurality of laminated dielectric layers (3) containing a ceramic; and a plurality of internal electrodes (4, 5) disposed along each of a plurality of interfaces between the dielectric layers (3). When the conductive metal or the alloy containing the conductive metal is represented by X, the internal electrodes (4, 5) contain a conductive component and a ceramic component, the conductive component contains X, and the ceramic component contains XTiO3. Preferably, X is one selected from nickel, copper, silver and a silver-palladium alloy.

The invention discloses a palladium alloy film hydrogen sensor and a hydrogen detection system and method.The sensor comprises a substrate, the substrate is provided with a first surface and a second surface which are opposite, the first surface is provided with a first hydrogen-sensitive film responding to the hydrogen concentration within a first detection range, and the second surface is provided with a second hydrogen-sensitive film responding to the hydrogen concentration within a second detection range; a second hydrogen-sensitive film which responds to the hydrogen concentration in a second detection range is arranged on the second surface, and the material components and / or microstructures of the first hydrogen-sensitive film and the second hydrogen-sensitive film are different; a temperature measuring element for measuring temperature and a heating element for heating are also arranged on the substrate; wherein the lower limit value of the first detection range is larger than the lower limit value of the second detection range and smaller than or equal to the upper limit value of the second detection range, and the upper limit value of the first detection range is larger than the upper limit value of the second detection range. According to the invention, the problems of complex design, large size, high power consumption, high cost and large error of an existing dual-sensing system are solved through integrated double-sided design of high and low measuring ranges and shared temperature compensation.

The invention discloses a preparation process of a palladium nano-film hydrogen sensor, and belongs to the field of sensor preparation. The preparation process of the palladium nano-film hydrogen sensor comprises the following steps: step 1, pre-treating an aluminum sheet, and flattening to remove a surface oxide layer; 2, carrying out primary oxidation and secondary oxidation; thirdly, the aluminum oxide layer is subjected to chambering operation, and an aluminum-based negative mold is obtained; step 4, carrying out polymerization and demolding; 5, coating the PMMA nano-column array sample through electron beam evaporation equipment to form a palladium alloy nano-film; step 6, preparing and arranging a microelectrode; 7, completing electrical connection and packaging between the microelectrode and an external circuit; the response value and the response speed of the prepared palladium nano-film hydrogen sensor are remarkably improved, and the situation that the sensor is rapidly aged and breaks down due to embrittlement, cracking or stripping caused by substrate limitation and strong lattice stress is avoided.

The invention belongs to the technical field of palladium or palladium alloy coatings, and particularly relates to a stress regulator for a palladium or palladium alloy coating and application of the stress regulator. The stress regulator for the palladium or palladium alloy coating is composed of a component A and a component B, the component A is selected from inorganic salt with reducibility, and the component B is selected from a compound shown in a molecular formula I. The invention further discloses a preparation method of the stress regulator for the palladium or palladium alloy coating. The invention further provides a palladium or palladium alloy electroplating solution which comprises the stress regulator for the palladium or palladium alloy coating. The technical scheme provided by the invention has an obvious stress adjusting effect on the palladium and palladium alloy coating, and especially under the condition that the coating is relatively thick, a qualified coating without warping and cracks can be obtained. # imgabs0 #

The invention relates to the technical field of medicines, and provides preparation and application of a nano-catalyst for interfering colorectal cancer formic acid metabolism. The novel AuPd-GO-PVP nano-catalyst is prepared by synthesizing a certain proportion of gold-palladium alloy, loading the gold-palladium alloy on a graphene oxide carrier and modifying PVP with good biocompatibility at the same time. The nano-catalyst can efficiently catalyze and degrade formic acid at normal temperature and normal pressure to generate carbon dioxide and hydrogen. The AuPd-GO-PVP nano-catalyst with the concentration of 0.2 mg / mL can be used for completely catalyzing formic acid with the concentration of 20 mM within 90 minutes. On the cellular level, the nano-catalyst AuPd-coated GO-coated PVP can efficiently inhibit formic acid induced colorectal cancer invasion and metastasis, meanwhile, generated hydrogen can achieve efficient reductive killing on colorectal cancer cells, and finally efficient treatment of colorectal cancer is achieved.

The application provides a gold-palladium plating solution for copper wire electroplating and an electroplating process, wherein the gold-palladium plating solution for copper wire electroplating is characterized by comprising the following raw material components: 0.3-20 g / L of water-soluble gold salt, 0.1-12 g / L of water-soluble palladium salt, 10-20 mg / L of graphene quantum dots, 20-30 g / L of ethylenediamine, 50-110 g / L of a complexing agent, 15-25 g / L of a conductive salt, 15-25 g / L of a buffering agent, 25-35 g / L of a stabilizing agent, and the rest is solvent. The electroplating process is as follows: the copper wire to be plated is placed into an electroplating tank containing the gold-palladium plating solution, an electrode plate is used as an anode, and the copper wire is used as a cathode to perform electroplating, and after the electroplating is completed, the copper wire is subjected to a post-plating treatment process. The gold-palladium plating solution and the electroplating process have the advantages of simple process, high conductivity, wear resistance, strong corrosion resistance, uniform plating layer distribution, precise size, aging resistance and the like of the obtained gold-palladium alloy plating layer.

The invention discloses a palladium alloy-based hydrogen sensor, comprising a shell and a sleeve arranged below the shell, wherein a flange fixedly connected to the bottom of the shell is arranged on one end of the shell, a heat-conducting bracket is threadedly connected to the inside of the sleeve, and a gas-sensitive chip for detecting the hydrogen concentration in transformer oil is installed inside the heat-conducting bracket; the heat-conducting bracket is composed of a base and a plurality of heat-conducting pipes longitudinally arranged on the base, and an annular heat pipe connected to the plurality of heat-conducting pipes is arranged at one end of the plurality of heat-conducting pipes away from the base; a sleeve ring for fixing the annular heat pipe is also arranged inside the sleeve, and the sleeve ring is movably connected to the annular heat pipe; the invention utilizes the heat dissipation effect of the heat-conducting bracket and the condenser to quickly extract the heat of the medium oil around the gas-sensitive chip, thereby ensuring that the gas-sensitive chip works stably in a constant temperature environment and improving the service life of the chip.

The invention relates to a hydrogen sulfide separation system (A) and method for producing pure hydrogen (30) with high efficiency and environmental sustainability for the energy sector, while also converting sulfur (40) into economic value by producing sulfuric acid (60) The system includes a gasification unit (100) to convert liquid hydrogen sulfide (10) into gaseous hydrogen sulfide (20), an electrolyzer (200) equipped with a palladium-alloy membrane (290) to separate hydrogen (30) and sulfur (40) through electrolysis, and an oxidation unit (300) to oxidize sulfur (40) using hydrogen (30) and oxygen (50), resulting in sulfuric acid (60). The method enhances energy efficiency, reduces operating costs, and offers a sustainable solution for hydrogen production.

The application discloses an electrochemical double hydrogenation three-cell system, which comprises a chemical cell, an anode cell, a cathode cell, an ion exchange film, a palladium film, and a power supply; the palladium film serves as an anode electrode, and a first nano-porous palladium alloy catalyst is coated on one side of the surface of the palladium film; a cathode electrode is arranged in the cathode cell, and the cathode electrode is a second nano-porous palladium alloy catalyst; the system generates adsorbed hydrogen by electro-oxidation of a second organic substrate in the anode cell on the surface of the palladium film through the anode electrode; the adsorbed hydrogen is transferred to the chemical cell through the characteristics of the palladium film body phase hydrogen transfer, and the hydrogenation of the organic substrate is realized on the surface of the first nano-porous palladium alloy catalyst; meanwhile, the cathode electrode generates adsorbed hydrogen by hydrolysis on the surface of the second nano-porous palladium alloy catalyst to realize the hydrogenation of the organic substrate, and finally the electrochemical double hydrogenation of the organic matter is realized; experimental results show that when the three-cell system is applied to organic hydrogenation, the faraday efficiency is as high as 200%, and meanwhile, the system has excellent stability and ultralow energy consumption.

The invention discloses an NTC (Negative Temperature Coefficient) thermistor and a preparation method thereof, the NTC thermistor comprises a ceramic substrate and electrodes, the electrodes are attached to two ends of the ceramic substrate, the electrodes are connected with leads, a glass packaging layer is arranged on the outer side of the ceramic substrate, and the ceramic substrate and the electrodes are wrapped by the glass packaging layer; the ceramic matrix is prepared from the following raw materials in percentage by weight: 40%-60% of manganese oxide, 10%-20% of cobalt oxide, 20%-30% of nickel oxide, 3%-12% of copper oxide and 1%-5% of doped element oxide; the electrode is a silver-palladium alloy electrode, and the mass ratio of silver to palladium is 7: 3-9: 1. By accurately controlling the raw material proportion and the preparation process of the ceramic matrix, the thermistor has a relatively high response speed and can timely and accurately reflect the rapid change of the temperature. And meanwhile, the thermistor has a wider resistance-temperature characteristic range and higher stability, and is suitable for the field of high-precision temperature measurement and control. And the oxidation resistance and the stability of the improved thermistor are improved.

The invention discloses a high-precision linear palladium alloy wire and a preparation method thereof and a high-precision probe, and the palladium alloy wire comprises the following components in percentage by weight: 38-43% of Pd, 25-35% of Cu, 20-32% of Ag, 0.01-2% of trace elements, and at least one selected from Zn, Ni, B, Al and In, the palladium alloy wire is obtained by carrying out at least three stages of fine drawing through a drawing assembly with the surface roughness Ra being smaller than 0.05 micrometer, the diameter is smaller than 0.8 mm, the surface roughness Ra is smaller than 0.05 micrometer, the diameter tolerance is within + / -0.002 mm, and the roundness is within 0.001 mm. According to the method, the palladium alloy wire material is comprehensively optimized in component design and processing path, so that the palladium alloy wire material still has relatively small diameter tolerance, good roundness and relatively low surface roughness under the condition of a micro diameter, and the quality uniformity and the test stability and precision of a probe array are favorably improved.

A heater assembly (100) for an aerosol generating system (200), wherein the heater assembly (100) comprises a resistance heating element (102) for vaporizing a liquid aerosol generating substrate and a porous body (104) for transporting the liquid aerosol generating substrate to the resistance heating element (102), the porous body (104) having a liquid absorption surface (104a) and a heating surface (104b), the resistance heating element (102) being located on the heating surface (104b) of the ceramic porous body (104), and the resistance heating element (102) containing a silver-palladium alloy consisting of 53 to 73 weight percent silver, 7 to 23 weight percent palladium, 1 to 7 weight percent carbon, 3 to 17 weight percent oxygen, and impurities.

The invention discloses a silver-palladium alloy nanowire and a preparation method and application thereof, and belongs to the technical field of nano alloy materials. The preparation method comprises the following steps: (1) adding an aqueous solution of hexadecyl trimethyl ammonium bromide and an aqueous solution of dopamine hydrochloride into an aqueous solution of silver nanowires, uniformly stirring, dropwise adding an aqueous solution of sodium chloropalladate, and continuously stirring until the reaction is completed to obtain a reaction product; and (2) carrying out centrifugal washing on the reaction product to obtain the silver-palladium alloy nanowire. The prepared silver-palladium alloy nanowire material is used for catalytic reduction of 4-nitrophenol, verification of a photothermal effect and glutathione level detection, so that the application of the silver-palladium alloy nanowire material in the field of catalysis is effectively expanded; and a brand new nano-alloy material and an application approach are provided for high-sensitivity and high-selectivity detection of glutathione level due to the exertion of a photothermal effect.