44 results about "Sem analysis" patented technology

The nano fiber material surface treating process includes compounding solution as coating material precursor, soaking the fiber material to be treated inside the solution for adsorbing the precursor homogeneously, regulating pH value, setting in constant temperature water bath to form 20-100 nm thick film coating the fiber, softening treatment and stoving. The SEM analysis shows that the surface nano layer is homogeneous and has good coating effect, the treated fiber has strength, hand feeling and brightness superior to the un-treated fiber. The treated fiber has far infrared function, antibiotic function, anti-ultraviolet function, etc. depending on the coated matter.

The invention discloses a preparation method of a carbon tube-modified molybdenum disulfide negative pole material of a lithium ion battery. The preparation method comprises compounding an organic sulfide, a polymolybdate and carbon nanotubes according to a certain ratio, carrying out a hydrothermal reaction process to obtain a solid product, washing the solid product through deionized water or ethanol, drying the solid product to obtain a precursor, calcining the precursor in an inert atmosphere at a calcining temperature of 600-800 DEG C, keeping the temperature for 2-6h, cooling the productin a furnace to the room temperature so that a molybdenum disulfide-carbon nanotube composite material is obtained, and carrying out SEM analysis, XRD analysis, cycle test and conductivity test on the composite material to obtain the one-dimensional rod-shaped nitrogen-modified molybdenum oxide negative pole material of a lithium ion battery. The preparation method improves the conductivity of the electrode material, enhances the stability of the lithium insertion/extraction active site in the crystal structure, improves the intercalation or deintercalation ability of lithium ions between layers and realizes a high specific capacity, good cycle performances and electrical conductivity.

The invention relates to a mutual non-solid-solution system metal infiltration process and device based ion implantation radiation damage. The process comprises the following steps of polishing and ultrasonic cleaning of pure tungsten metal, vacuum drying, silver metal plasma implantation, tungsten metal surface vacuum evaporation silver coating, vacuum drying, argon protection silver infiltration, hot-pressing infiltration supplementation, section scanning electron microscope (SEM) observation of a tungsten/silver composite metal material, section line scanning component analysis, Auger energy spectrum analysis of components along the material depth, welding strength test when the tungsten/silver composite metal material is used for spot-welding electrodes, and SEM observation of welding head tensile fractures. In the invention, a metal plasma implantation technology is utilized to combine with the vacuum evaporation technology, the high-temperature silver infiltration technology and the hot-pressing infiltration supplementation technology, thus silver metal is successfully infiltrated to the surface of a metal tungsten workpiece to prepare the tungsten/silver composite metal material. Test results show that when a tungsten/silver composite metal material electrode is utilized to carry out resistance spot welding on a silver metal interconnection sheet and an aerospace craft solar cell sheet, the single-spot welding strength is up to 450gf which excesses Chinese military standard and current enterprise standard, and the welding head tensile fractures is determined to be ductile fractures through SEM analysis.

The invention relates to a sulfonated polyether ether ketone micro nanoparticle/ sulfonated polyether ether ketone composite membrane, and a preparation method thereof, and belongs to the technical field of a high molecular material. By starting from the improvement on the dry and wet state dimension stability of a sulfonated polyether ether ketone membrane, polyether ether ketone micro nanoparticles are used as raw materials; interface reaction is firstly used to prepare sulfonated polyether ether ketone micro nanoparticles; then, sulfonated polyether ether ketone micro nanoparticle/ sulfonated polyether ether ketone blended slurry is prepared by a solution blending method; finally, the sulfonated polyether ether ketone micro nanoparticle/ sulfonated polyether ether ketone composite membrane is prepared by a solution casting method. The composite membrane has excellent swelling resistant performance and high-proton conduction. Through SEM analysis, the condition that sulfonated polyether ether ketone base resin and the surface sulfonated polyether ether ketone micro nanoparticles are tightly combined is shown. After the sulfonated polyether ether ketone micro nanoparticles are doped, high proton conductivity is shown; the conductivity is improved along with the increase of the sulfonation degree.

The invention discloses a cationic composite magnetic flocculant. During the copolymerization of dimethyl diallyl ammonium chloride and acrylamide monomer, Fe3O4 particles modified through oleic acid are introduced, and after an initiator is added, a novel composite magnetic flocculant CMF is synthesized. FTIR, XRD, TG and SEM analysis show that Fe3O4 is uniformly dispersed in the CMF in a magnetic core manner, the CMF contains DMDAAC and AM characteristic functional groups, and the mass fraction of organic matter is 62 percent. In a coagulation and sedimentation experiment for simulating wastewater through kaolin, compared with polyacrylamide and aluminum polychlorid, the CMF, serving as a flocculant, obtains a higher turbidity removal rate within a shorter period of settling time.

The invention relates to the field of undisturbed soil samples and in particular relates to an undisturbed soil vacuum soaking device and a method for preparing a sheet for SEM analysis. The undisturbed soil vacuum soaking device is novel in structure and ingenious in concept and provides scientific soaking equipment for microstructure analysis of undisturbed soil; and according to the method for preparing the sheet for SEM analysis, the undisturbed soil is treated by employing a cementing material infiltration method, the current method for preparing a general microscopic sample is improved, and the adhesiveness between soil particles is improved through soaking and hardening of the first and second soaking solutions, so that the original soil structure of an undisturbed soil test block is not damaged in the cutting, grinding and polishing processes, the image acquired by a scanning electron microscope is clear, real and objective, and technical support is provided for accurately and deeply analyzing the microstructure of the undisturbed soil.

The invention discloses a solution and a method for displaying an outline of an electrostatics discharge (ESD) positive-negative (PN) junction in a power metal oxide semiconductor (MOS). In the method, the solution for displaying the outline is prepared from a 49 mass percent HF solution and a 70 mass percent HNO3 solution in a volume ratio of (1:300)-(5:100), and a sample to be detected is soaked in the solution for displaying the outline for preset time, and is reacted with an N+ region to slightly damage a P+ region, so that the outline of the ESD PN junction in the power MOS is displayed clearly. Moreover, the method for displaying the outline is simple and is convenient to operate, and the outline which is damaged slightly is provided so as to facilitate the subsequent scanning electron microscope (SEM) analysis of devices.

The invention discloses a quick counting and monitoring method of silicon substrate chip dislocation defects. The method comprises the steps of providing a silicon substrate chip sample needing analysis and manufacturing an analysis section. The analysis section is subjected to corrosion processing through crystal defect corrosive liquid, and is subjected to SEM analysis. The method increases the observation range of the dislocation defects on a silicon substrate, and can improve analysis speed of the dislocation defects, improve dislocation monitoring and analysis efficiency and lower cost.

An electrode-membrane combination for use in a fuel cell comprising at least one reactant diffusive, electronically conductive electrode (1, 3) comprising at least one first catalytically active metal and at least one ionically conductive polymer; and at least one ionically conductive membrane (2) contacting the electrode to form an electrode-membrane interfacial region (4, 5), wherein the interfacial region comprises at least one zone comprising at least one second catalytically active metal and having a zone thickness of about 3 angstroms to about 475 angstroms. Surprisingly improved power output is observed. The zone is preferably deposited by electrom beam physical vapor deposition. Substantially spherical modules are observed for the zone from field-emission SEM analysis.

The invention relates to a method for testing operating parameters in breakage of a copper wire of electric transmission and transformation equipment. The method includes steps of sampling from practical burnout equipment, selection of an intact wire of identical specification and preparation into a high-temperature simulation sample, Gleeble tensile experiment at different temperatures, metallographic analysis on fractures of a practical broken wire and a broken wire pulled by GLEEBLE, SEM analysis on the fractures of the practical broken wire and the broken wire pulled by GLEEBLE, TEM analysis on the fractures of the practical broken wire and the broken wire pulled by GLEEBLE, and the like. High cost of destructive tests of practical power transmission and transformation equipment underseries parameters is avoided, most approximate operating parameters in breakage instantaneity in operation can be obtained, and accordingly effective criterions can be provided for accident analysis.

An etchant composition for SEM image enhancement of P-N junction contrast. The composition comprises an NTC-1 solution mixed with an NTC-2 solution at a specific volumetric ratio. The NTC-1 solution is prepared by mixing solution “A” comprising organic acid, HF, and nitric acid with a 49% HF solution. The NTC-2 solution comprises metal ions and a strong oxidant. After the preparation of the NTC-1 and NTC-2 solutions, they are mixed together at specific volumetric ratio. Before carrying out an SEM analysis, the SEM specimen is dipped into the etchant composition.

The invention discloses a PN junction dyeing method comprising the steps that step one, protection is formed on the surface of a sample to be analyzed and then protection rings of two ends are ground in the cross section direction of a groove so that the sample only having the protection rings parallel to the source region groove is obtained; step two, the protection rings of the ground sample are comprehensively protected through the protection layer, and gold plating is performed on the surface and the back surface of regions without protection by using a gold plating machine; step three, the protection rings of the ground sample are comprehensively protected, and gold plating is performed on the front surface and the back surface of the cross section of the regions without protection by using the gold plating machine; and step four, the protection layer is removed, and normal temperature junction dyeing is performed in the mixed liquid of hydrofluoric acid, nitric acid and acetic acid and then SEM analysis is performed. Gold plating is performed on the super junction source region and blocking is performed on the projection rings so that P-type and N-type conductivity difference of a protection ring region can be enhanced and the junction dyeing effect can be enhanced.

The invention relates to a preparation method of a gamma-FeOOH catalyst and a special device and an application. By employing a self-made gamma-FeOOH preparation device, optimization conditions of synthesizing high purity gamma-FeOOH is obtained by effectively controlling the dosages of N2 and O2 in a reaction process, investigating influence of factors, for example, the adding amount of phosphate, temperature and the like on shape and purity of gamma-FeOOH, and observing the shape characteristics and surface shape characteristics of gamma-FeOOH through XRD and SEM analysis. Therefore, the removal effect of iron ions in a water phase is investigated by employing gamma-FeOOH, thereby providing reliable scientific base data for an actual application.

The invention discloses a method for preparing a LiFePO4 positive electrode material through carbon cladding and Na+ doping in one step. According to the method, a sodium polyacrylate high-temperature reduction method is used for preparing the LiFePO4 positive electrode material and meanwhile the purpose of metal Na+ doping is achieved. A test for preparation of LiFePO4 through high-temperature solid-phase reduction serves as a contrast test, wherein polypropylene serves as a carbon source in the preparation process. Through XRD and SEM analysis, the prepared LiFePO4 with sodium polyacrylate serving as the carbon source has a good olivine-type structure, the crystal form is good, particle size distribution is even, and the performance in each aspect of the LiFePO4 with the sodium polyacrylate serving as the carbon source is greatly improved compared with that of the LiFePO4 with the polypropylene serving as the carbon source. Electricity is discharged at the first time under 0.1 C. The discharging ratio electric capacity of the material reaches up to 168 mAh/g and the circulation performance is good. Thus, the method for preparing the LiFePO4 through sodium polyacrylate high-temperature solid-phase reduction is novel and practical.

The invention belongs to the field of a concrete performance testing system, and discloses a testing method for salt frost resistance of concrete. The testing method comprises the following steps: selecting raw materials; selecting a concrete cube testing piece of which the size is 100mm*100mm*100mm; testing the compression strength values of the concrete cube testing pieces after a freezing and thawing cycle under a natural condition, a water environment, a chlorine salt solution environment and a sulfate solution environment, and carrying freezing and thawing cycle testing according to a 'quick freezing method' of an anti-freezing test in Standard for Test Methods of Long-Term Performance and Durability of Ordinary Concrete GB/T50082-2009; taking a test sample, and carrying out SEM (Scanning Electron Microscope) analysis. According to the testing method disclosed by the invention, factor level is determined according to related specifications of concrete by taking a water cement ratio, the cement content and fineness modulus as factors, the influence of the three factors on the durability of the concrete can be analyzed through an orthogonal test, and primary research on the failure mechanism of ordinary concrete through the SEM analysis.

The present invention provides a preparation method for a supercapacitor electrode material MnO2. The method concretely comprises: adopting a citric acid sol-gel method to prepare a nano-MnO2 material, and studying influence on a sample due to different calcination temperatures and heat preservation times. Results of XRD analysis and SEM analysis show that: low valence manganese oxides (MnO2 and MnO2) are obtained with calcination at different temperatures (350-500 DEG C), and M'' valence oxides can be obtained with an acidification treatment; after calcination is performed for a short time, the sample has characteristics of small particle and large specific surface area, and results of cyclic voltammetry and constant current charge/discharge tests show that the sample with a 3 hour heat preservation treatment has a good capacitance characteristic. In addition, results show that the prepared MnO2 electrode material has good electrochemical performance, and is suitable for a supercapacitor electrode material. The preparation method for the supercapacitor electrode material MnO2 is characterized in that: 1, a dry gel is calcined at different temperatures to obtain low valence manganese, and then an acidification treatment is performed to obtain MnO2; 2, a calcination heat preservation time affects electrochemical properties of the sample, wherein the prepared MnO2 with a 3 hour heat preservation treatment has a good capacitance characteristic, and electrochemical performances are excellent.

The invention provides an evaluation method for the service life of a lead-based anode material, and belongs to the field of hydrometallurgy. The evaluation method for the service life of the lead-based anode material comprises the following steps that 1, the lead-based anode material is processed through the methods of polishing and chemical processing, and it is ensured that the surface of the lead-based anode material is free of obvious scratches; 2, electrolytic treatment is conducted on the lead-based anode material through a solution containing CrO3, H2SO4, NaCl and NH4F; 3, the thicknesses of oxidation films within different processing time are analyzed through SEM; 4, the internal stress of the oxidation films of different thickness is determined by using a Raman spectrographic method and an XRD analysis method; 5, the relationship between the stress sigma and the oxidation film thickness X is built, that is, sigma=AX+B; and 6, the service life of the lead-based anode material is evaluated according to the stress gradient A. According to the evaluation method for the service life of the lead-based anode material, the service life of the lead-based anode material can be evaluated easily, conveniently, rapidly and accurately, the economical and practical effects are achieved, and the cost is low; it is conducive to master the using and replacing periodicity of a lead anode in the electrolysis industry and the electroplating industry, continuous production is ensured, and the quality of cathode products is improved.

The invention provides a multi-specification microscope linkage analysis sample table for transmission electron microscope samples. The sample table comprises a unit body, an instrument compatible shell and an assembler. The unit body plays a role in bearing and fixing the TEM grid, the instrument compatible shell has various specifications, the shape of the instrument compatible shell is matched with the used instrument, the unit body can be fixed, then the instrument compatible shell is suitable for different instruments, and combined analysis of various instruments is achieved. Three fixing grooves are formed in the assembler, so that the TEM grid can be directly fixed, and the unit body and the instrument compatible shell can also be fixed. On the basis of the TEM grid, compatibility of different instruments is achieved through the modularized external structure design, and after the TEM grid is installed at a time, only the corresponding instrument compatible shell needs to be replaced, and the sample table can be used among a plurality of instruments in a combined mode. As a universal sample table scheme, the sample table is suitable for the whole process of two-dimensional material transfer preparation, PLM observation, AFM characterization and SEM analysis, the experiment convenience is fully enhanced, and the experiment efficiency is improved.

The invention discloses a method for analyzing the tin layer thickness of a CP leading-out wire for an electrolytic capacitor. The method comprises the steps of: firstly, vertically fixing a CP leading-out wire for an electrolytic capacitor, enabling the leading-out wire to be perpendicular to a mold, carrying out the SEM analysis after the leading-out wire is polished, and then carrying out measurement analysis by Image Pro Plus software. The method is simple and convenient to operate. The tin layer thickness information and the distribution state of the leading-out wire for the electrolytic capacitor can be conveniently, rapidly and accurately obtained, the actual structure condition of the tin layer can be comprehensively and visually reflected, the problem that the thickness of only one point can be detected at a time is avoided, and detection points do not need to be replaced for multiple times. The method is suitable for quality control of electrolytic capacitor outgoing line manufacturing departments and electrolytic capacitor production departments, and provides technical support for researching the comprehensive performance of the electrolytic capacitor.

The invention provides a method for preparing a solar selective absorbing coating with a spinel structure. According to the technical scheme, CuCl2, Mn(CH3COO)2 and ethanol are taken as raw materials, hydroxy propyl cellulose is added into the sol, and the film-forming performance of the sol is improved. In the sintering process, the heating rate is controlled to be 1 DEG C per minute, the prepared coating grains are tightly arranged and are average in granularity, and obvious defects on the coating surface are avoided. The coating prepared by pulling twice at a pulling speed of 20mm per minute has the thickness of about 1pm, the absorption rate of 0.88 and the emissivity of 0.05. After the coating is insulated at the temperature of 500 DEG C for 1-30 hours, a small amount of original CuO and Mn2O3 in the coating is converted into Cu1.5Mn1.5O4, the absorption rate and emissivity of the coating are slightly improved, the highest absorption rate is 0.91, the emissivity is 0.09, and the performance is not degenerated. The method disclosed by the invention has the characteristics that the SEM analysis result proves that the grains in the coating do not grow in the thermal insulation process, cracking even stripping are avoided, and the thermal stability is high.