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113results about How to "Reduce sample preparation time" patented technology
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Method and apparatus for nanoparticle transport and detection
InactiveUS7077939B1Accurate detectionGood reproducibilityMaterial nanotechnologyElectrolysis componentsNanoparticleCatheter
Owner:TEXAS A&M UNIVERSITY
Iron alloy fusing sample preparation method for X-ray fluorescence spectrum analysis
InactiveCN101832891AReduce sample preparation timeAnalytical results are reliableMaterial analysis using wave/particle radiationPreparing sample for investigationX-rayFerrosilicon
The invention relates to an iron alloy fusing sample preparation method for X-ray fluorescence spectrum analysis, belonging to the technical field of materialization detection and aiming to solve the problem that fusing a film production alloy sample can erode a platinum crucible. The method comprises the steps of building up wall of the platinum crucible, preparing an oxidizing agent, pre-oxidizing an iron alloy sample and fusing and preparing sample from the iron alloy sample. The invention provides the fusing sample preparation method suitable for various iron alloys such as ferromanganese, silicomanganese, calcium silicon, ferrosilicon, ferromolybdenum, ferrotitanium, cymrite, ferrochrome, ferrocolumbium, ferrovanadium, silicon silicomanganese and the like. By adopting the method, a glass fusing piece can be manufactured without eroding the valuable platinum crucible, the sample can be completely oxidized in the sample preparation process, the sample preparation time is short, the prepared glass fusing piece is uniform and perfect, and the mineral effect and the granularity effect can be completely eliminated. The invention has safe and reliable method, simple and convenient operation and good repeatability, is suitable for various iron alloy samples and widens the application range of the fluorescence analysis.
Owner:HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
Method for detecting alkaloids and nitrosamines in tobaccos simultaneously
ActiveCN103257196ASimple pretreatment processReduce sample preparation timeComponent separationNicotiana tabacumTobacco chemistry
The invention discloses a method for detecting alkaloids and nitrosamines in tobaccos simultaneously, and belongs to the technical field of tobacco chemical composition detection. The method comprises the working procedures of: sample extraction, purification, analysis and quantification. Firstly an internal standard solution and ultrapure water are added into tobacco leaf powder, extract liquor passes through a filter film after ultrasonic extraction, then methanol is added, protein is removed through centrifugation after shaking, and supernatant is subjected to liquid chromatography-mass spectrometry. After standard solutions of compounds to be detected with different concentration gradients are prepared by adopting a mixing preparation method, and the liquid chromatography-mass spectrometry is carried out, standard curves of instrument responses of the compounds to the actual concentrations of the solutions are drawn, curve equations are fitted, and the detection concentrations are calculated according to measured values of the instrument responses of the compounds to be detected and converted to the actual concentrations of the compounds to be detected in tobacco samples. The detection method provided by the invention can be used for carrying out the qualitative and quantitative analysis on alkaloids and nitrosamines in the tobacco samples simultaneously, and is easy and convenient to operate, good in reproducibility, high in analytic sensitivity and accurate in quantification.
Owner:YUNNAN ACAD OF TOBACCO AGRI SCI
Preparation method of silicon chip metallographic specimen
InactiveCN102607916ANo warpingNo brokenPreparing sample for investigationOrganic solventAcrylic resin
The invention discloses a preparation method of a silicon chip metallographic specimen. The preparation method comprises the following steps: (1) proportioning and mixing acrylic resin powder and a liquid curing agent uniformly according to instructions, adding an organic solvent with the weight of 5-25% of the total weight of the acrylic resin powder and the liquid curing agent, and mixing uniformly to prepare a cold inserted agent; (2) placing a silicon chip on the bottom of a silicon gel cold inserted mold, pouring the cold inserted agent prepared in the step (1), and curing; and (3) carrying out polishing and corrosion treatment on the cured metallographic specimen, wherein the organic solvent is ethanol, glycol or isopropanol. The preparation method of the silicon chip metallographic specimen disclosed by the invention has the advantages that the metallographic specimen of the ultra-thin and fragile silicon chip can be prepared, structure morphologies such as dislocation with clear materials are obtained, the phenomena of wrapping, crashing and the like of the ultra-thin silicon chip in specimen insertion and polishing processes are avoided, the problem that the micro scratch of the ultra-thin silicon chip is difficult to remove is solved, and the metallographic specimen of the ultra-thin silicon chip is prepared successfully.
Owner:SUZHOU XIEXIN INDAL APPL INST
Briquette coal sample making tool and method
InactiveCN102928272AUniform density distributionGuaranteed homogeneityPreparing sample for investigationEngineeringBriquette
The invention discloses a briquette coal sample making tool and method. The method comprises the following steps of: putting a wet coal powder between an upper pressing head and a lower pressing head in a coal pressing tube by using the briquette coal sample making tool which comprises the upper pressing head, the lower pressing head, a coal pressing tube spring and a sampling device; applying a load to the upper pressing head downwards by using a press machine; compacting the wet coal powder so as to form a coal sample and then stopping the applying of the load; and then unloading the spring and the lower pressing head; and pressing the upper pressing head downwards, so as to press the coal sample out of the coal pressing tube. According to the invention, technical defects in the traditional briquette coal sample making are solved; and the effective coal sample making tool and method are provided, so that the uniformity and making success rate of the briquette sample are increased.
Owner:HENAN POLYTECHNIC UNIV
Positioning ultrathin slice method for pathologic cell infected with virus
InactiveCN103558055AStay naturalAvoid damageWithdrawing sample devicesPreparing sample for investigationElectron microscopeVirus
The invention relates to a positioning ultrathin slice method for a pathologic cell infected with a virus. The method comprises the following steps: (1) with a chamber slide as an embedding die and cells infected with a virus as a model, carrying out in-situ embedding on the cells by using a resin when a lesion occurs in the cells; (2) directly exposing a target cell through trimming or drilling out the target cell and then exposing the target cell through trimming; (3) preparing an ultrathin slice for the target cell; and (4) observing the ultrathin slice of the target cell by using a transmission electron microscope.
Owner:STATION OF VIRUS PREVENTION & CONTROL CHINA DISEASES PREVENTION & CONTROL CENT
Preparation method of SERS (surface enhanced Raman spectrum) substrate and sample
InactiveCN106770171AUniform thicknessRegular shapePreparing sample for investigationRaman scatteringSurface-enhanced Raman spectroscopyFiltration
The invention provides a preparation method of an SERS (surface enhanced Raman spectrum) substrate and an SERS sample. In the preparation method, a filter membrane is taken as a carrier, rapid drying is realized by vacuum drawing filtration, and the obtained SERS substrate and the obtained SERS sample are uniform in thickness, regular in shape, uniform in SERS signals and high in repeatability. An experimental result indicates that the detection limit of SERS signals of an SERS sample of adenine prepared by the method provided by the invention reaches 10<8> M, the signals have high uniformity at different sampling points on different samples or on a same sample, and the repeatability among the samples is high; and Raman signals of an SERS sample of enterobacterium can be lowered to 3.6% relatively to the standard deviation, and the uniformity and the repeatability are high.
Owner:INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
Testing apparatus for preparing large-diameter remolded soft clay sample
InactiveCN104316378AReduce disturbanceReduce sample preparation timePreparing sample for investigationSoft clayPore water pressure
The invention discloses a testing apparatus for preparing a large-diameter remolded soft clay sample. The testing apparatus comprises a main bracket, wherein a support platform is arranged on the main bracket; a filter-press container is arranged on the support platform; a filter device and a filter water collection device are arranged at the bottom of the filter-press container; a bearing plate is arranged above the filter-press container; the bearing plate is aligned with the filter-press container and is fixed on a pressing bracket; the pressing bracket comprises a vertical rod which runs through a through hole on the support platform and extends downwards; a bearing rod is arranged at the lower end of the vertical rod; at least two lug plates are fixed at the lower end of the support platform; levers are connected on the lug plates in a swinging manner; weight racks are arranged at the front ends of the levers; balancing weights are sleeved at the back ends of the levers; and the levers are erected on the bearing rod. The testing apparatus disclosed by the invention is simple and reasonable in structure and convenient to operate, an is applicable to a model test of strengthening a soft foundation through combination of indoor vacuum preloading method and electro-osmosis method; and bending condition of a plastic drainage plate as well as change rules of vacuum degree and pore water pressure in soil in a soil consolidation process can be reflected more visually.
Owner:WENZHOU UNIVERSITY
Sample preparation system of carbon-14 in solid sample
InactiveCN103728653AEasy to intervene in operationPrevent leakageRadiation measurementGas coolerSilica gel
The invention provides a sample preparation system of carbon-14 in a solid sample and belongs to the field of a radioactive sample preparation system. The sample preparation system is of an overall integrated cabinet type structure. All parts are arranged in an integrated cabinet. Compressed gas in the sample preparation system is controlled by a gas intake micrometering valve, an automatic valve, a pressure sensor and a mass flow meter and enters a buffering device and a sample tube. Pyrogenic decomposition is carried out on a sample in a decomposition bed in the aerobic atmosphere. A catalyzing bed is used for catalyzing the oxidized gas with heat and the gas is cooled by a cooling device. Tritium adsorption and water processing are carried out through a silica gel adsorption bed. The gas enters absorbers which are connected in series in three levels to be adsorbed through flow control. The re-processed gas is exhausted by a vacuum pump. According to the sample preparation system of the carbon-14 in the solid sample, a computer interface can be directly used for controlling a sample preparation process. In an automatic operation process, an operator can conveniently intervene in the whole operation process after authority of the operator is approved. The sample preparation system of the carbon-14 in the solid sample is economical, practical, capable of saving the energy and protecting the environment, high in practicability, capable of conveniently replacing parts, easy to clean and capable of achieving small scale and automation.
Owner:INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
Method for determining contents of monomers of ENB type ethylene-propylene-diene monomer rubber
InactiveCN104181185AAvoid exposure to toxic reagentsReduce sample preparation timePreparing sample for investigationAnalysis using nuclear magnetic resonancePeak areaChemistry
The invention discloses a method for determining the contents of monomers of an ENB (ethylidene norbornene) type ethylene-propylene-diene monomer rubber and for aviation fuel solid nuclear magnetic resonance analysis. The method comprises the steps of determination of detected objects, preparation of a detected sample, selection of detection conditions, implementation of nuclear magnetic detection, and processing of detection data, wherein ethylene, propylene and ethylidene norbornene of the ethylene-propylene-diene monomer rubber are taken as the detected objects; the detected sample is subjected to pre-weighing and small block cutting treatment; a solid nuclear magnetic resonance spectrometer is adopted, and an acquisition method is carbon monopulse and hydrogen-decoupled pulse sequences; and after belongingness of spectral peaks and integration of spectral peak areas, the detection data is obtained through formula calculation. With utilization of the solid nuclear magnetic resonance spectrometer, with the monomers of the ethylene-propylene-diene monomer rubber as the detected objects, and through sample preparation, spectrogram acquisition, spectral peak belongingness, integration processing and formula calculation, the mass percentage contents of the monomers of the sample are obtained. The method has the advantages of convenient operation, safe use, accurate detection data and scientific experimental method, simplifies the experimental steps, and saves detection costs.
Owner:HUBEI INST OF AEROSPACE CHEMOTECH
Measurement device and measurement method for measuring flow of capillary tube bundle for nano-emulsion
InactiveCN105300839AReduce particle size changeGood reproducibilityDirect flow property measurementData processing systemWater storage
The invention discloses a measurement device for measuring flow of a capillary tube bundle for nano-emulsion. The measurement device comprises a sample preparation system, a feeding system and a measurement system; the sample preparation system comprises a first feeding pump, a first water storage device, a second feeding pump, a second water storage device, a first intermediate container, a second intermediate container, a first mixing chamber, a second mixing chamber, a third feeding pump, a fourth feeding pump, a fourth water storage device, a fourth intermediate container, a mechanical stirring machine, an electromagnetic heating stirrer and a magneton; the feeding system comprises a sixth feeding pump, a sixth water storage device, a sixth intermediate container, a seventh intermediate container, a first valve, a second valve, a fifth feeding pump and a first multi-ported valve; the measurement system comprises the capillary tube bundle, a second multi-ported valve, a third multi-ported valve, a first pressure sensor, a second pressure sensor, a data acquisition system, a data processing system and a measurement container. The invention also provides a measurement method for measuring flow of the capillary tube bundle for nano-emulsion by utilizing the device; reproducibility, accuracy and usability of flow experimental data are improved.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
7A05 aluminum alloy corrosion solution
InactiveCN105200427AClear grain boundaryClear grainPreparing sample for investigationDistilled waterFluorhydric Acid
The invention discloses a 7A05 aluminum alloy corrosion solution. The 7A05 aluminum alloy corrosion solution is prepared by adding certain amounts of nitric acid, hydrochloric acid and hydrofluoric acid into distilled water, and comprises the following ingredients by volume: 3.5% of nitric acid, 2.5% of hydrochloric acid, 10.5% of hydrofluoric acid and the balance of distilled water. During preparation of the 7A05 aluminum alloy corrosion solution, nitric acid, hydrochloric acid and hydrofluoric acid are added in sequence. After the 7A05 aluminum alloy corrosion solution is utilized for corroding a 7A05 aluminum alloy, grain boundaries and grains of the corroded 7A05 aluminum alloy are clearly displayed; the corrosion effect is relatively good, the metallographic specimen preparation period is greatly shortened, and the corrosion period is relatively short.
Owner:何小红
Observation aid for high-temperature laser scanning confocal microscope samples and using method thereof
PendingCN110632075ASimple structureThe processing technology is easy to operatePreparing sample for investigationMaterial analysis by optical meansRoom temperatureLaser scanning
The invention discloses an observation aid for high-temperature laser scanning confocal microscope samples and a using method thereof. The aid comprises a seat body, bolts and a wafer sample, whereinthe seat body is cylindrical; a plurality of through threaded holes are circumferentially and uniformly formed in the seat body; the bolts are meshed in the threaded holes; the bolts are formed by topping and grinding traditional bolts; placing grooves are formed in the top surfaces of the bolts; and wafer samples are fixedly connected in the placing grooves. The using method comprises the steps of sample mounting, sampling grinding and sample observation. The observation aid has the following beneficial effects that the cylindrical seat body is easy to be handheld for polishing, so that the grinding and polishing of multiple wafer samples at one time are convenient and benefit is brought to improve the surface quality and flatness of the wafer samples; and the fingers are prevented from being in direct contact with the samples and the wafer samples are easier to be uniformly stressed in the grinding process, so that the thickness uniformity of the samples is ensured. The aid is capable of observing the surface grinding corrosion conditions of multiple samples at the same time under a high-temperature laser confocal room-temperature microscope.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY
Preparation method for TEM sample
ActiveCN105699698AAvoid processing powerAvoid reactionScanning probe techniquesIon beamCombinatorial chemistry
Disclosed in the invention is a preparation method for a TEM sample. An inclined cutting opening is formed in a chip sample surface by using an ion beam and level removing and TEM sample preparation are carried out on a target area position directly, so that time for TEM sample preparation is substantially shortened; and the position and depth for level removing are controlled precisely, so that the success rate of sample preparation and the quality of the sample are improved. And the chip sample is protected from being damaged.
Owner:SHANGHAI HUALI MICROELECTRONICS CORP
Hard clay undisturbed three-axis sample preparation device and using method thereof
ActiveCN107367414AImprove securityImprove integrityPreparing sample for investigationCircular discElectric machine
The invention belongs to the field of hard clay sampling, and particularly relates to a hard clay undisturbed three-axis sample preparation device and a using method thereof. The device comprises a support, wherein a base is arranged at the bottom of the support; a bottom plate is arranged on the base; a lower fixing disc is arranged in the middle of the bottom plate; an upper fixing disc is arranged at a position above the lower fixing disc; the upper fixing disc is connected with a guiding rod; the guiding rod penetrates through a tool cap; the tool cap is connected with a hollow spiral tool; the tool cap is in threaded connection with a feeding guide track; the feeding guide track is a threaded rod, penetrates through the top of the support and then is connected with an output end of a stepping motor; and the stepping motor is positioned on the top of the device and is controlled by a controller. The hard clay undisturbed three-axis sample preparation device is skillful in structural design; the size and perpendicularity of a soil sample can be controlled accurately; success rate of soil sample preparation is high; sample preparation time is saved; the sample preparation efficiency is greatly improved; and the business application value is high.
Owner:ZHONGYUAN ENGINEERING COLLEGE
Photocatalytic hydrogen production catalyst and preparation method thereof
ActiveCN108714432AExcellent photocatalytic hydrogen production performanceThe method is simplePhysical/chemical process catalystsNitrogen compoundsMicrowaveMicrowave oven
The invention discloses a photocatalytic hydrogen production catalyst and a preparation method thereof. The catalyst is h-BN(x, t), 1 / 6<=x<=1 / 48, 30min<=t<=50min, x is the proportion of boric acid tourea, and t is microwave heating time. The preparation method includes the steps: sufficiently dissolving the boric acid to the urea by the aid of deionized water, drying mixture into a drying oven, and transferring steamed samples into a mortar to grind the samples; transferring the grinded samples into an aluminum oxide crucible with the volume of 25 milliliters, placing the whole samples into an aluminum oxide crucible with the volume of 50 milliliters, covering the samples by aluminum silicate, placing the samples into an aluminum oxide crucible with the volume of 200 milliliters, coveringthe samples with copper oxide, transferring the samples into a microwave oven to heat the samples for 30-50 minutes to obtain a finished product. The catalyst has good photocatalytic hydrogen production activity and practical application prospects.
Owner:ZHEJIANG NORMAL UNIVERSITY
Method for manufacturing multilayer nanowires by template electrochemical synthesis technology
InactiveCN104152958AEasy to operateReduce manufacturing costNanotechnologyElectroforming processesElectrical resistance and conductanceChemical synthesis
The invention relates to a method for manufacturing multilayer nanowires by a template electrochemical synthesis technology. Three plating baths are adopted, and a three-electrode system is utilized for performing control-potential deposition; a secondary anodised aluminum film electrode is put into the NiFe plating bath, control-potential deposition is carried out on NiFe alloy, the NiFe alloy is ultrasonically cleaned and is rapidly converted into the Cu plating bath, control-potential deposition is carried out on Cu, the Cu is ultrasonically cleaned and then is rapidly converted into the Co plating bath, control-potential deposition is carried out on Co, the Co is ultrasonically cleaned and is rapidly converted into the Cu plating bath, control-potential deposition is carried out on Cu, control-potential deposition of the NiFe, the Cu, the Co and the CU is taken as one period and repeated, and the NiFe / Cu / Co / Cu multilayer nanowires are obtained. The manufactured NiFe / Cu / Co / Cu spin-valve multilayer nanowires are good in GMR effect, a high-density magnetic random access memory, a GMR magnetic reading head, a high-sensitivity magnetic sensor and the like can be manufactured, and the method has the wide application prospect in the fields of information memory, automatic measuring and the like.
Owner:TIANJIN UNIV
Method for measuring dislocation density of steel through electron back-scattered diffraction (EBSD)
ActiveCN108535295ASimple processReduce sample preparation timeMaterial analysis using wave/particle radiationTest sampleScanning electron microscope
Disclosed is a method for measuring dislocation density of steel through the electron back-scattered diffraction (EBSD). The method includes preparing standard samples and a plurality of to-be-testedsamples, sequentially placing the samples in an scanning electron microscope with the EBSD, scanning the samples and recording scanning data, processing the scanning data, determining interfacial density Pi(standard) of small-angle interface of the standard sample and interfacial density Pi of small-angle interface of the to-be-tested samples, measuring dislocation density d (standard) of the standard sample, calculating the constant k by the formula d(standard)=k*Pi(standard), and then calculating the dislocation density of the to-be-tested samples by the formula d=k*Pi. Compared with the other conventional method for measuring dislocation density, the method is much convenient and accurate, and can measure and compare the dislocation density of different steel products visually.
Owner:CENT IRON & STEEL RES INST +1
Wafer failure analysis method
ActiveCN112180231AImplement failure analysisAvoid damageElectronic circuit testingWaferFailure analysis
The embodiment of the invention discloses a wafer failure analysis method, which comprises the steps of determining a target test area in a cutting channel of a wafer, the wafer comprising a driving wafer layer and an array wafer layer which are stacked, wherein the array wafer layer comprises a stacking layer located on the driving wafer layer and a substrate located on the side, deviating from the driving wafer layer, of the stacking layer, and the target test area comprises a through contact penetrating through the array wafer layer and a test structure formed in the driving wafer layer andlocated below the through contact; performing protection processing on the surface of the through contact to obtain a wafer after protection processing; etching the substrate, located in the array wafer layer, in the wafer after the protection processing to obtain a wafer after the etching processing; and performing failure analysis on the wafer after the etching processing.
Owner:YANGTZE MEMORY TECH CO LTD
Method for producing biolgoical sample embedded block based on atomic force microscope observation
InactiveCN1256579CInexpensive and non-toxicThe method steps are simplePreparing sample for investigationAtomic force microscopyEpoxy
The invention discloses a preparation method of a biological sample embedding block based on atomic force microscope observation, which belongs to the technical field of bioengineering. Use 2% glutaraldehyde fixative to fix biological tissue samples or cell samples at low temperature, wash with 0.2mol / L phosphate buffer, follow the ethanol gradient of 50% → 70% → 95% → absolute ethanol → absolute ethanol Carry out dehydration, embedding after infiltration by epoxy resin 618, and then heating and polymerizing. The heating temperature and time are: 35°C for 12 hours → 45°C for 12 hours → 60°C for 24 hours. Thus, a biological sample embedding block suitable for AFM observation is obtained. The steps of the method of the invention are relatively simple, most of the reagents used are domestic, easy to obtain and low in price, and are suitable for making embedding blocks of various animal tissues and cell samples.
Owner:SHANGHAI JIAO TONG UNIV
Iron alloy fusing sample preparation method for X-ray fluorescence spectrum analysis
InactiveCN101832891BReduce sample preparation timeAnalytical results are reliableMaterial analysis using wave/particle radiationPreparing sample for investigationX-rayFerrosilicon
Owner:HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
Testing device for preparing saturated soil sample and sample preparation method thereof
PendingCN108398306AHigh speedSignificantly saturated signalPreparing sample for investigationEngineeringLow vacuum
The invention discloses a testing device for preparing a saturated soil sample and a sample preparation method thereof. The testing device comprises a vacuum cover with a spherical structure, whereinthe vacuum cover comprises an upper vacuum cover and a lower vacuum cover; the upper vacuum cover and the lower vacuum cover are respectively connected with an air exhauster through exhaust pipes; a saturation device for placing a soil sample for testing is arranged between the upper vacuum cover and the lower vacuum cover; the saturation device is connected with the upper vacuum cover and the lower vacuum cover through bolts respectively; the lower end of the vacuum cover is also connected with a water cylinder through a water guide pipe; the lower vacuum cover is connected with a bracket forsupporting the testing device; the bracket is of a circular-platform-shaped structure. By adopting testing device disclosed by the invention, the efficiency of preparing the saturated soil sample canbe improved and signal is obvious when the soil sample is saturated; the soil sample can reach the optimal saturation effect.
Owner:YULIN UNIV
Novel Mn-4%Al-La-Sc alloy etchant solution
InactiveCN105200430AShorten metallographic sample preparation timeMetallographic etching is simple and fastPreparing sample for investigationFluorhydric AcidPotassium hydroxide
The invention discloses a novel Mn-4%Al-La-Sc alloy etchant solution. A preparation method of the etchant solution comprises the step of adding a certain amount of potassium hydroxide, hydrochloric acid and phosphoric acid to distilled water, wherein the compositions comprise, by mass, 9% of hydrofluoric acid, 4.5% of hydrochloric acid, 7.5% of phosphoric acid and the balance distilled water, and the adding sequence is that phosphoric acid is added in the first place, then hydrochloric acid is added, and finally hydrofluoric acid is added, and obtaining the etchant solution. By means of the etchant solution, metallographical corrosion of Mn-4%Al-La-Sc alloy can be made be as simple, fast and convenient as that of aluminum alloy, cost is saved, and the etchant solution is particularly applied to corrosion of the Mn-4%Al-La-Sc alloy.
Owner:周雪
TC18 titanium alloy corrosion solution
InactiveCN105220151AClear grain boundaryClear grainPreparing sample for investigationOXALIC ACID DIHYDRATEPhysical chemistry
The invention discloses a TC18 titanium alloy corrosion solution. The corrosion solution is prepared by adding a certain amount of nitric acid, oxalic acid and hydrofluoric acid into distilled water, wherein the volume ratio of hydrofluoric acid, oxalic acid, nitric acid and distilled water is 1: 2.5: 3: 5. During preparation, nitric acid, oxalic acid and hydrofluoric acid are added successively. After TC18 titanium alloy is corroded by the corrosion solution, the crystal boundary and the crystalline grain of the titanium alloy are clearly showed. The corrosion effect is good, the metallographic sample preparation time is greatly shortened, and the corrosion time is short.
Owner:黎维品
Method for continuously and rapidly determining conventional elements and microelements in niobium and tantalum concentrates
InactiveCN105699364AReduce sample preparation timeReduce dosagePreparing sample for investigationAnalysis by thermal excitationNiobiumTa element
The invention discloses a method for continuously and rapidly determining conventional elements and microelements in niobium and tantalum concentrates. The method comprises the following steps: fusing a sample by utilizing NaOH and Na2O2; after washing the sample with a NaCl solution, separating; taking sediment and a raw solution to determine respectively; finally, determining macro-elements by adopting a plasma spectral method, and analyzing and determining by adopting a method for determining the microelements through a plasma mass-spectrometric method. The method is simple and rapid, can be used for continuously determining 54 types of elements in one step, and has the advantages of accuracy in detection and low detection limit.
Owner:王君玉 +2
Method for preparing GH4169 high-temperature alloy TEM (transmission electron microscopy) sample
InactiveCN109406556AImprove production efficiencySafe preparationMaterial analysis using wave/particle radiationElectrolysisAlcohol
The invention belongs to the technical field of alloy material detection and analysis, and particularly relates to a method for preparing a GH4169 high-temperature alloy TEM (transmission electron microscopy) sample. The method aims at solving the technical problems that the existing method for preparing the GH4169 high-temperature alloy TEM sample is low in efficiency, and that the quality is poor. The method aims to provide the economical, efficient, convenient and fast method for preparing the GH4169 high-temperature alloy TEM sample. The method for preparing the GH4169 high-temperature alloy TEM sample is characterized by comprising the following steps that after the thickness of a GH4169 high-temperature alloy sample is reduced to 70 to 80 mu m, an electrolysis double-spray method isused for thinning; used electrolyte is a mixed solution of 10-percent perchloric acid and 90-percent absolute ethyl alcohol. The TEM sample prepared by the method has high surface quality and large thin regions; the method is very applicable to the large-batch preparation of high-quality GH4169 high-temperature alloy TEM samples.
Owner:CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
Novel 45CrNi4VA steel corrosion solution
InactiveCN105220153ADisplay clearShorten metallographic sample preparation timePreparing sample for investigationFluorhydric AcidCorrosion
The invention discloses novel 45CrNi4VA steel corrosion solution. The novel 45CrNi4VA steel corrosion solution comprises mixed acid; the mixed acid is prepared by adding a certain quantity of hydrofluoric acid, hydrochloric acid and alcohol in distilled water, wherein the volume fractions of the components are 4.5% of hydrofluoric acid, 8% of hydrochloric acid and 2% of alcohol; the balance is the distilled water; and the adding sequence of the components is nitric acid, hydrochloric acid and alcohol. The prepared corrosion solution can enable the gold phase corrosion of 45CrNi4VA steel to become simple and quick, saves the cost, and in particular, is suitable for the corrosion of the 45CrNi4VA steel.
Owner:胡磊磊
Method for judging abnormal reasons of solar cell based on PL test
ActiveCN112259468AEasy to manufactureReduce sample preparation timeSemiconductor/solid-state device testing/measurementFinal product manufactureEtchingEngineering
The invention discloses a method for judging abnormal reasons of a solar cell based on PL test, which comprises the following steps of S1, vertically turning a silicon wafer subjected to wet etching through a turning windmill, horizontally outputting the silicon wafer through a blanking belt, selecting the silicon wafer on a specified pass, and directly carrying out double-sided coating passivation and printing sintering treatment to form a to-be-tested silicon wafer, and S2, performing PL test and judgment on the to-be-tested silicon wafer, and if a dark strip-shaped region appears in an image of the PL test, judging whether the dark strip-shaped region is a front roller mark of a wafer turning windmill or a wet etching blanking belt mark according to the direction of the dark strip-shaped region, thereby deducing a corresponding abnormal part. The method can achieve the quick recognition and judgment of the abnormal machine in a high-efficiency solar cell long-process production line, and reduces the abnormal time and the abnormal impact.
Owner:JA SOLAR
Sample preparation method for carbon fiber tensile property test
ActiveCN102809499BAdjustable tensionGuaranteed uniformityPreparing sample for investigationMaterial strength using tensile/compressive forcesEpoxyFiber
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Parallel intelligent pressurized triaxial sample preparation technique
ActiveCN108978617AAccurately simulate the force processReduce sample preparation timeIn situ soil foundationParticle compositionInstrumentation
The application relates to a parallel intelligent pressurized triaxial sample preparation technique and belongs to the technical field of indoor geo-techniques of civil engineering. The parallel intelligent pressurized triaxial sample preparation technique includes: (1) preparing before an experiment, to be specific, determining magnitude of pressure to be applied in the experiment process and experiment-required time according to stress history, depositional conditions and particle composition of experimental soil; (2) preparing instruments; (3) placing a soil sample; (4) compacting; (5) extracting the soil sample; (6) resetting the instruments, and preparing a next sample according the steps of (1) to (5). The parallel intelligent pressurized triaxial sample preparation technique enablestriaxial sample preparation pressure and time to be intelligently controlled, enables multiple samples to be formed at a time, ensures shorter sampling time and less disturbance upon a soil sample, overcomes the defect that traditional sample tube sampling is difficult and has certain engineering applicability.
Owner:SHAOXING UNIVERSITY
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