76results about How to "Improve surface activity" patented technology

This invention discloses a pretreatment method for detecting trace perfluorinated and polyfluoroalkyl substances (PFAS) in complex matrix textiles, belonging to the field of materials analysis technology. The method involves placing the textile in an alkaline solvent containing an alkyl sulfonate displacing agent. Under heating conditions, the displacing agent utilizes its competitive adsorption mechanism to forcibly occupy matrix adsorption sites and displace the target analytes into the solvent. Subsequently, the temperature is rapidly lowered to the phase separation induction temperature, inducing supersaturation precipitation of the displacing agent, which then encapsulates impurities in situ and co-precipitates, forming a solid-liquid stratified system. Finally, the supernatant is collected for analysis. This invention utilizes the dual properties of the displacing agent—high-temperature solubilization and low-temperature phase change removal—to effectively break the strong adsorption equilibrium of aged textiles without using a solid-phase extraction column. This solves the contradiction between low extraction rate and significant matrix interference, significantly improving the recovery rate of PFAS. It offers advantages such as low cost, simple operation, and high accuracy.

The invention discloses a carbon nanomaterial pretreatment device and a process thereof, and belongs to the technical field of carbon nanomaterial modification and application, the device comprises a pretreatment main body, a roller way conveying mechanism, a sagger and a collecting and releasing dust-free purification area, the roller way conveying mechanism penetrates through the purification area and the pretreatment main body, the pretreatment body is provided with a low-temperature area, a medium-temperature area, a high-temperature area and a cooling area in the material conveying direction, the temperatures of all the temperature areas are independently controlled, an exhaust and detection assembly is arranged, and the roller way conveying speed can be adjusted to control the material retention time. According to the process, carbon nanotubes are fed into a device through dust-free feeding, and the temperatures (300-600 DEG C) of a low-temperature area, a medium-temperature area, a high-temperature area and a cooling area and the protective gas and oxidant atmosphere are accurately regulated and controlled; according to the method, the pretreatment target of'modification but not destruction 'is achieved, the purity, surface activity and dispersity of the carbon nanotubes are synchronously improved, the defect structure is optimized, the specific surface area is increased to 600-1000 m < 2 > / g, and the core performance is remarkably enhanced.

This invention relates to the field of surfactant technology and discloses a biodegradable amphoteric surfactant and its preparation process. The process involves reacting a diol compound and a diacyl chloride compound, followed by a reaction with 1,3-propanesulfonate lactone to obtain the biodegradable amphoteric surfactant. Both the main chain and side chains of this surfactant contain a large number of biodegradable ester groups, exhibiting a high biodegradability rate and making it environmentally friendly. The side chains of this surfactant contain a large number of amphoteric betaine ion groups, among which a large number of sulfonic acid anions have strong coordination and complexation effects with iron ions. After complexation, the concentration of iron ions in the solution is significantly reduced, making it suitable as a complexing agent for better application in the iron complexation desulfurization process. Complexing iron ions can prevent iron ion precipitation, thus maintaining the good oxidizing properties of iron ions and reducing hydrogen sulfide to sulfur.

The utility model relates to the technical field of paint spraying processing, and discloses a flame dust removal device for paint spraying processing, which comprises a manipulator, a fire spraying device fixedly connected to the end part of the manipulator, a connecting device fixedly connected to the bottom of the fire spraying device, and a spray head fixedly connected to the end part of the fire spraying device, an adjusting assembly is arranged on the outer surface of the spray head, so that in order to enable the equipment to spray flames on the outer surface of the workpiece more uniformly, when the equipment processes the painted workpiece, the manipulator controls the spray head at the end part of the flame spraying device to aim at the outer surface of the workpiece to spray flames; the mechanical arm can well control the distance between a spray head at the end of the fire spraying device and a workpiece, then the surface activity of paint on the outer surface of the workpiece is better, the good dust removal effect can be achieved, meanwhile, a worker rotates a rotating piece, the space between a blocking piece and the inner wall of the spray head is adjusted, and the work efficiency is improved. Therefore, flames can be in uniform contact with the outer surface of the workpiece.

The invention discloses an anaerobic denitrifying bacterial agent as well as a preparation method and application thereof, and belongs to the technical field of water environment treatment. The anaerobic denitrifying bacterium agent is prepared from the following components in parts by weight: 15 to 30 parts of sterile water, 15 to 60 parts of normal saline, 5 to 10 parts of micro-capsule embedded anaerobic denitrifying bacteria, 5 to 20 parts of a porous composite modified carrier, 10 to 30 parts of a carbon source, 4 to 7 parts of nutrient elements, 2.5 to 4 parts of a buffering agent and 1 to 5 parts of a stabilizer, the micro-capsule embedded anaerobic denitrifying bacteria are obtained by embedding anaerobic denitrifying bacteria with an alginic acid gel solution and a calcium chloride solution; the porous composite modified carrier is obtained by crosslinking modified nano iron oxide, modified nano titanium dioxide, a functional polymer solution and glutaraldehyde. The anaerobic denitrifying bacterial agent provided by the invention can effectively improve the efficiency of treating nitrogen pollution of a water body.

This invention discloses a highly efficient chiral viral-like nanomedicine carrier for overcoming the gastrointestinal physiological barrier and its construction method, wherein the chiral viral-like nanomedicine carrier is a chiral viral-like mesoporous silica drug-loaded carrier. The construction method of the highly efficient chiral viral-like nanomedicine carrier for overcoming the gastrointestinal physiological barrier includes: using indomethacin as a model drug, and loading indomethacin IMC into a series of mesoporous silica spherical MSNs, viral mesoporous silica VSNs, and chiral viral-like mesoporous silica CVSNs. The chiral viral-like mesoporous silica of this invention has good degradability and biosafety. Its viral topology and chiral modification can enhance the surface and interfacial activity of the carrier and exhibit certain nanoscale chiral recognition capabilities, showing significant advantages in various processes of crossing the intestinal barrier. It can enhance its functionality as an oral drug carrier, has important research value and clinical translation prospects, and provides a reference for the surface and interfacial design of future drug carriers.

The invention relates to the technical field of carbon dioxide adsorbents, in particular to a silicon-based / aluminum-based solid amine adsorbent prepared from montmorillonite and a preparation method and application of the silicon-based / aluminum-based solid amine adsorbent. According to the invention, the montmorillonite subjected to acid activation treatment is extracted to obtain the silicon-based nano material with silicon dioxide as a main component. In addition, through step-by-step neutralization treatment on the strongly acidic filtrate, metal ions in the filtrate are successfully extracted and converted into an aluminum-based nano material with aluminum oxide as a main component. The solid amine adsorbent is prepared by taking a silicon-based and aluminum-based composite nano material with high specific surface area and high surface activity as a carrier and combining amino functionalization treatment. According to the method, high-added-value overall utilization of the montmorillonite is achieved, the montmorillonite is converted into a high-capacity and high-selectivity novel trapping material from low-adsorbability minerals, the original acid filtrate with high corrosivity is converted into an environment-friendly sodium chloride neutral solution, and green chemistry and circular economy concepts are practiced.

A preparation method of a graphite heat-conducting gasket capable of being compressed and rebounded comprises the steps that an artificial graphite film is pretreated to obtain a pretreated film, and pretreatment comprises punching, bending, surface grafting and plasma surface treatment; preparing epoxy modified polydimethylsiloxane resin according to a preset proportion; wherein the preset proportion comprises the following components in percentage by mass: 90 to 98 percent of epoxy modified polydimethylsiloxane, 2 to 10 percent of polydimethylhydrosiloxane and 0.1 to 0.4 percent of platinum catalyst; coating the surface of the pretreatment film with the epoxy modified polydimethylsiloxane resin, and carrying out die assembly on the pretreatment film with a preset number of layers to obtain blocky graphite; and slicing and post-processing the blocky graphite to obtain the graphite heat-conducting gasket. By matching the epoxy modified polydimethylsiloxane resin with a specific ratio, a stable cross-linked network structure is formed, and the structural strength and the heat conduction stability of the gasket are further enhanced.

This invention belongs to the field of material surface treatment technology, specifically relating to a wafer polishing slurry, its preparation method, and its application. The wafer polishing slurry comprises abrasives, oxidants, dispersants, surfactants, pH adjusters, and water. The components of the wafer polishing slurry work synergistically, shortening polishing time and improving polishing efficiency when applied to wafer polishing. Furthermore, it significantly improves the surface quality of the polished wafer, markedly reducing scratches and defects, and lowering surface roughness to below 0.15 nm, thus meeting the surface quality requirements of fields such as power electronics and radio frequency devices.

This invention relates to the field of sodium-ion battery technology, and discloses a sodium-ion cathode material, its preparation method and application, a sodium-ion battery, a sodium-ion battery pack, and a device. The sodium-ion cathode material includes a matrix and a coating layer covering the matrix; the matrix has the composition shown in Formula I: Na 1‑x [Ni y Mn z M u Ti v O2 Formula I; the coating layer has the composition shown in Formula II: Na 2‑β Ti 6‑α M′ α O 13 Formula II. This sodium-ion cathode material possesses characteristics such as high ionic and electronic conductivity, strong structural stability, and strong chemical stability. Furthermore, using this composite cathode material in sodium-ion batteries can effectively improve the battery's electrochemical performance.

The application discloses a non-ion-anion water-reducing agent and preparation and application thereof. The water-reducing agent is shown as formula (1).

This invention belongs to the field of oral care technology and provides a bismuth microsphere oral care agent that eliminates halitosis and has anti-inflammatory and antibacterial properties. The agent comprises a bismuth complex, wherein the bismuth complex is a porous bismuth microsphere selected from Bi2O2CO3 and Bi2O2CO3@Bi2S3 heterojunctions. This oral care agent can rapidly respond to the high expression of H2S in periodontitis, eliminating halitosis, inhibiting inflammation, and regulating the periodontal microenvironment. Simultaneously, the (Bi2O2CO3) microspheres react with H2S to form Bi2O2CO3@Bi2S3 heterojunctions in situ, which can efficiently kill bacteria under light irradiation.

The invention discloses an NO2 sensor based on an MOF-derived Ni-doped In2O3 core-shell octahedral sensitive material and a preparation method of the NO2 sensor, and belongs to the technical field of semiconductor metal oxide gas sensors. The sensor is composed of a ceramic tube substrate with parallel annular gold electrodes on the surface, an MOF-derived Ni-doped In2O3 core-shell octahedral sensitive material film coated on the surfaces of the electrodes and the substrate, and a nichrome heating coil arranged in the ceramic tube. A core-shell octahedral structure In2O3 nano material with a high specific surface area and abundant pores is constructed by using an MOF template method, and a Ni-doped modulated electronic structure and enhanced surface activity are combined, so that the sensitivity of the sensor to NO2 gas is remarkably improved, the detection lower limit is reduced, the humidity interference is effectively inhibited, and the detection sensitivity of the sensor to NO2 gas is improved. The invention provides a reliable solution for monitoring trace NO2 in a complex environment, and has important practical value and application prospect.

This invention belongs to the field of road engineering and industrial solid waste resource utilization technology, and particularly relates to a construction method for heavy-duty roads in mining areas based on solid-oil toughened oil shale waste residue. The method involves constructing, from bottom to top, an existing layer treatment layer, a first bonding layer, a high-toughness surface layer, a second bonding layer, and a solid-oil toughened oil shale waste residue overlay layer on the existing road layer in the mining area. After crushing, screening, and drying, the oil shale waste residue undergoes surface modification using a silane coupling agent hydrolysate, and is then mixed with toughening oil components and dried to obtain solid-oil toughened oil shale waste residue. This overlay layer is then mixed with aggregates, fillers, and cementing materials, and spread and compacted to form the overlay layer. The existing layer treatment layer improves the base condition through defect repair and interface treatment. The two bonding layers enhance interlayer bonding, and the high-toughness surface layer improves structural toughness and stress dispersion capacity. This method significantly improves the load-bearing capacity, rutting resistance, fatigue cracking resistance, and interlayer stability of heavy-duty roads in mining areas, achieving efficient resource utilization of oil shale waste residue.

The application discloses a preparation method of 3,4,5,6-tetrahydrophthalic anhydride by catalytic isomerization, and nitrogen-doped porous carbon is prepared by carbonizing melamine sponge, the nickel is loaded by cooperating with wetting of a surfactant and ultrasonic cavitation, and the loaded nickel catalyst is obtained by roasting and reduction. 1,2,3,6-tetrahydrophthalic anhydride is heated and refluxed in an organic solvent and catalyst to isomerize, the catalyst is recovered by filtration, and the product is obtained by cooling and crystallizing the filtrate. The method utilizes the through macroporous structure to eliminate the mass transfer resistance, and the nitrogen-anchored nickel prevents agglomeration, so that the catalyst is low in cost, recyclable and free of waste water.

A foam separation method for harvesting Cr 3+ This method, belonging to the field of heavy metal wastewater treatment, uses the natural nonionic surfactant Sapindus mukorossi extract as a foaming agent and a trapping agent to treat Cr-containing wastewater. 3+ Cr in aqueous solution 3+ Foam separation and harvesting were performed. The critical micelle concentrations of Sapindus mukorossi extract and five other surfactants were determined, and the effects of pH, gas flow rate, liquid loading, collection time, Sapindus mukorossi extract concentration, and Cr were investigated. 3+ The effect of initial concentration on separation efficiency was investigated, and the process was optimized through orthogonal experiments. The results showed that at room temperature, with pH 6.5, gas flow rate 400 mL / min, collection time 4 min, loading volume 300 mL, Sapindus mukorossi extract 0.2 g / L, and chromium sulfate 10 mg / L, Cr... 3+ The recovery rate can reach 71.5%, and the enrichment ratio is 3.9. The foaming agent used in this invention is widely available, easily degradable, and environmentally friendly, and is suitable for low concentrations of Cr. 3+ Separate harvesting.

This invention relates to the field of natural product separation and recombination, and particularly to a recombinant saponin from *Gleditsia sinensis* and its preparation method. The method includes: 1) crude saponin extraction: water extraction of *Gleditsia sinensis* pericarp to obtain a crude saponin solution; 2) impurity removal: loading the crude saponin aqueous solution into macroporous adsorption resin AB-8 and eluting to remove impurities; 3) saponin component separation: eluting sequentially with 25-35% ethanol solution, 40-50% ethanol solution, 55-65% ethanol solution, and 70-80% ethanol solution to obtain S30, S45, S60, and S75 saponin components, respectively; 4) saponin hydrolysis: hydrolyzing the S45 saponin component to obtain hydrolyzed saponin; 5) saponin component recombination: recombining the saponin components obtained in steps 3) and 4) with the hydrolyzed saponin to obtain recombinant saponin from *Gleditsia sinensis*. This invention enables saponin purification and improves the surface activity of *Gleditsia sinensis*.

The invention relates to the technical field of fabrics, in particular to an aerogel chemical fiber cotton fabric production process which comprises the following steps: (1) washing and drying a chemical fiber cotton fabric, and then performing normal-pressure dielectric barrier discharge plasma modification treatment to obtain a modified chemical fiber cotton fabric; (2) adding water into the nano silicon dioxide aerogel powder, stirring and performing ultrasonic treatment while adding water to obtain a nano silicon dioxide aerogel aqueous solution, and continuously adding waterborne polyurethane glue and a coupling agent while stirring and performing ultrasonic treatment to obtain nano silicon dioxide aerogel finishing glue; (3) immersing the modified chemical fiber cotton fabric into the nano silicon dioxide aerogel finishing glue, and rolling and drying to obtain the aerogel chemical fiber cotton fabric. A layer of aerogel covering body is formed on the fiber surface of the chemical fiber cotton fabric, so that the chemical fiber cotton fabric with multiple effects of heat preservation, flame retardance and hydrophobicity is obtained.

The application discloses an inorganic composite solid electrolyte and a preparation method thereof, and relates to the technical field of lithium batteries, and specifically discloses an inorganic composite solid electrolyte and a preparation method thereof. The preparation method of the inorganic composite solid electrolyte comprises the following steps: S1, mixing lithium salt, metal oxide A, metal oxide B and ammonium dihydrogen phosphate, wherein the metal oxide B is titanium oxide, and intermittent vibration ball milling is performed to obtain mixed powder; S2, adding lanthanum oxide and germanium oxide into the mixed powder obtained in the step S1, and continuing to perform intermittent vibration ball milling to obtain composite powder; and S3, performing low-temperature sintering on the composite powder obtained in the step S2, and pressing to obtain an inorganic composite solid electrolyte film layer. The preparation method can significantly improve the reaction activity and synergistic effect among raw materials by adopting two-step intermittent vibration ball milling and one-step low-temperature sintering, and the conductivity of the inorganic composite solid electrolyte and the lithium ion transmission performance and cycle life of the solid battery are improved, and meanwhile, no solvent is used in the preparation process, and the sintering cost is reduced.

This invention relates to a hypoxia-responsive T2-T1 switchable MRI contrast agent, its preparation method, and its application. The hypoxia-responsive T2-T1 switchable MRI contrast agent comprises iron oxide nanoclusters and polyethylene glycolamine and / or ethanolamine modified on the iron oxide nanoclusters. The iron oxide nanoclusters are obtained by cross-linking iron oxide nanoparticles via hypoxia-sensitive azo bonds. The MRI contrast agent of this invention can specifically respond to the hypoxia environment of the tumor microenvironment, thereby achieving a change from aggregation to dispersion of extremely small iron oxide nanoclusters, thus enabling the switching from T2-type to T1-type contrast signals. Furthermore, after dissociation in response to the hypoxia environment, the re-formed extremely small iron oxide nanoparticles are more readily metabolized, increasing biocompatibility.

The application discloses a surfactant composition and application thereof, and belongs to the technical field of cosmetics.The surfactant composition provided by the application comprises sodium lauroyl glutamate, decyl glucoside, Tween-28, a betaine surfactant, a glycolipid and mucunna pruriens polysaccharide.The surfactant composition provided by the application can greatly reduce the dissolution of intercellular lipids and natural moisturizing factors and the damage to proteins on the basis of good surface activity, does not affect the skin barrier function, has a regulating effect on the skin microecosystem, balances the skin microecosystem, does not reduce the number of beneficial bacteria in the skin microecosystem, but can help reduce the number of harmful bacteria in the skin microecosystem, thereby effectively improving the skin barrier function and keeping the skin healthy.When applied to subsequent washing and protecting products, the washing and protecting products obtained are excellent in safety.

The application discloses a preparation method of a regenerated battery and the regenerated battery, and relates to the technical field of battery recycling and regeneration; and comprises the following steps: obtaining lithium iron phosphate waste and graphite waste based on retired lithium iron phosphate batteries; mixing the lithium iron phosphate waste, lithium carbonate lithium supplement and residual lithium precipitate, adding a composite filling agent and a titanium-lanthanum combined effect modifier for heat treatment to obtain a regenerated lithium iron phosphate material; performing acid pickling, drying and sorting on the graphite waste to obtain graphite powder; obtaining a suspension by mixing the graphite powder, a silane coupling agent and a carboxylated graphene combined agent and a solvent, and performing heat treatment on the suspension to obtain a regenerated graphite material; and preparing a positive electrode sheet and a negative electrode sheet based on the regenerated lithium iron phosphate material and the regenerated graphite material, and assembling the positive electrode sheet, the negative electrode sheet, an electrolyte and a diaphragm into the regenerated battery. The application optimizes the regeneration process of the lithium iron phosphate waste and the graphite waste, so that the electrochemical performance of the regenerated battery is improved.

The invention provides an SERS (Surface Enhanced Raman Scattering) substrate, a preparation method thereof and an integrated microfluidic detection system, and belongs to the cross technical field of optics and biosensing, the SERS substrate provided by the invention comprises the following components from bottom to top: a substrate layer used for supporting the overall structure of the SERS substrate and made of silicon; an adhesive layer; the lower surface of the reflecting layer is adhered to the upper surface of the substrate layer through the adhesion layer; the waveguide layer is adhered to the upper surface of the reflecting layer, a nano groove array is arranged on the upper surface of the waveguide layer, and a nano grass structure is arranged in a groove of the nano groove array. The SERS substrate provided by the invention has relatively high sensitivity and relatively low detection limit, and can realize rapid and convenient detection of tumor markers.

This invention relates to the field of electronic paste preparation technology, and discloses a low sheet resistance tungsten-copper electronic paste and its preparation method, comprising the following steps: Step 1, preparing tungsten-copper composite powder: spherical tungsten powder with a diameter of 1-10 μm and copper powder with a size of 1-3 μm are mixed by mechanical mixing, with a tungsten to copper weight ratio of 3:1-6:1. Before mixing, the copper powder needs to undergo graphene coating pretreatment; Step 2, preparing an inorganic binder: the inorganic binder includes, but is not limited to, the following components: glass powder, CuO, TiO2, La2O3, Pu6O11; Step 3, preparing an organic carrier: the organic carrier includes a solvent, an organic binder, and a thickener; Step 4, preparing the tungsten-copper paste. The tungsten-copper paste of this invention has widely available raw materials, a simple preparation process, and is suitable for mass production. Although graphene, a high-priced material, is added, the amount added is small and the performance is particularly excellent, making the cost of the tungsten-copper paste of this invention far lower than that of similar foreign products, resulting in a very high cost-performance ratio.

This invention discloses a high specific surface area mesoporous tin oxide powder and its preparation method. The method includes: dissolving a tin source in a mixed solvent of alcohol and deionized water, adding a ketone complexing agent and a nonionic dispersant, and stirring to form a tin-based complex precursor solution; then transferring the solution to a hydrothermal reactor for hydrothermal aging treatment, causing the precursor solution to hydrolyze and condense, forming gel particles in situ; after solid-liquid separation, washing with alternating anhydrous ethanol and dilute ammonia water, and drying to obtain the precursor powder; finally, performing staged heating calcination under an air-nitrogen mixed atmosphere, first removing organic components at low temperature, and then completing the crystal phase transformation at high temperature to obtain rutile phase SnO2 powder. The powder has an average particle size of 8–15 nm and a specific surface area of ​​85–110 m² / g. 2 The powder has a pergola size of 3–6 nm and good dispersibility. This invention effectively suppresses grain agglomeration through complexation regulation, hydrothermal-sol-gel coupling, and gradient atmosphere calcination. The prepared powder is suitable for applications such as gas sensors, lithium-ion battery anodes, or transparent conductive films.

The application discloses a method for improving the metalization connection strength of n-type Bi2Te3-based thermoelectric elements based on anchoring effect, and comprises the following steps: configuring a n-type Bi2Te3-based wafer surface treatment agent, the composition of which comprises 40-50% sulfuric acid (volume), 1-2% nitric acid (volume), and the rest is water; immersing a clean n-type Bi2Te3-based wafer into the surface treatment agent to perform surface etching; then immersing the etched n-type Bi2Te3-based wafer into ultrapure water to perform ultrasonic treatment; performing metalization connection on the ultrasonically treated n-type Bi2Te3-based wafer through electroplating or chemical plating, the plated metal is easy to form anchoring effect with the n-type Bi2Te3, the metalization connection strength is improved; and finally performing scribing and cutting to obtain the Bi2Te3-based thermoelectric elements with high metalization connection strength. The application makes the n-type Bi2Te3-based wafer have high surface roughness before electroplating, which is beneficial to forming anchoring effect with the plated metal such as nickel, so that the Bi2Te3-based thermoelectric elements with high metalization connection strength are obtained, and the thermoelectric elements are not physically damaged, and the product qualification rate can be improved.

The present application relates to a kind of high flame-retardant low-toxicity environmental protection computer cable and its preparation method, belong to computer cable technical field.The insulating layer and / or sheath layer of the cable uses environmental protection toughening flame-retardant composite material, it is with polyolefin resin as matrix, compound modified nano-aluminum hydroxide with KH560 silane coupling agent, melamine cyanurate, gradient compound ethylene-vinyl acetate copolymer and maleic anhydride graft polyolefin, by limiting core component ratio and key parameter, realize high flame-retardant, low-toxicity environmental protection and low-temperature toughness Synergistic unity.The present application process is simple and easy industrialization, applicable to computer room, automation control system, instrument signal transmission and other scenes, practicality is strong.

The invention relates to cyanide-free alkaline silver electroplating liquid for advanced packaging and application of the cyanide-free alkaline silver electroplating liquid to silver electroplating. An additive is a mixture of an o-benzoyl sulfonyl imide polyoxypropylene / vinyl ether propane sulfonate water solution and / or a beta-naphthyl sulfonyl imide polyoxypropylene / vinyl ether propane sulfonate water solution. The additive is matched with the silver salt, the complexing agent, the brightener and the pH regulator, a bright, fine, defect-free and spot-free silver plating layer can be obtained, the additive has the effect of reducing the internal stress of the silver plating layer, meanwhile, the additive has the characteristics of a surfactant, the surface tension between the plating layer and a substrate is reduced, and then the binding force between the plating layer and the substrate is enhanced. A cyanide-free system is safe and environment-friendly, and pollution is effectively reduced.

This invention belongs to the field of material performance testing technology, specifically relating to a method for determining the particle density of carbon anode raw materials. The method includes: injecting water into a first container until the liquid levels in the first and second containers are equal, and reading the scale of the first and second containers as V1; adding carbon anode raw material particles with a mass of m, including petroleum coke or calcined coke, into the first container; injecting a mixed solution into the first container until the carbon anode raw material particles are completely submerged, the mixed solution including pure water and a low-foaming nonionic surfactant; pre-treating the first and second containers in an ultrasonic instrument; and placing the pre-treated first and second containers into a vacuum chamber, evacuating the chamber until it reaches negative pressure, and maintaining the pressure in the vacuum chamber. This method for determining the particle density of carbon anode raw materials can accurately measure the particle density of carbon anode raw materials.

This invention discloses a low-temperature, rapid sintering method for preparing sodium molybdenum ceramic targets. Specifically, molybdenum trioxide powder and sodium molybdate dihydrate powder are first mixed using alcohol as a medium through ball milling to obtain a sodium molybdenum slurry. The slurry is then dried, filtered, ground, and sieved to obtain sodium molybdenum powder. The sodium molybdenum powder is then wetted with ammonium molybdate solution. The wetted sodium molybdenum powder is placed in a graphite mold for pre-pressing. The pre-pressed green body is then placed in a sintering furnace along with the graphite mold and subjected to spark plasma-assisted cold sintering at 200℃~400℃ and 50 MPa high pressure to obtain a sintered target body. The sintered body is then mechanically polished and ultrasonically vibrated to obtain a semi-finished target. The semi-finished target and a copper backing plate are brazed together, and after cleaning, drying, and vacuum sealing, the sodium molybdenum ceramic target is obtained. This invention enables the rapid (5 min) sintering of high-purity, high-density sodium molybdenum ceramic targets at low temperatures.