20results about How to "Shorten sample preparation cycle" patented technology

The invention discloses a remoulding soft clay sample preparation device and a remoulding soft clay sample preparation method based on a vacuum combined electron-osmosis effect. Nonwoven geotextile, a gravel layer, a sand mat layer and an electron-osmosis cathode are sequentially paved on an osmosis drainage base; the upper and lower ends of a latex film are respectively turned outward and sleeved on a sample loading solidification cylinder and are fixed with the osmosis drainage base by a bolt through a flange; a water vapor separation cylinder is provided with an electric contact vacuum member and is connected with the osmosis drainage base and a vacuum pump respectively through an air pipe; slurry is poured into the designated height of the sample loading solidification cylinder, and an electro-osmosis anode is put in; and the electro-osmosis anode and the electro-osmosis cathode are respectively connected with a programmable direct-current power supply by wires. Under the combined effect of vacuum negative pressure and electro-osmosis, the drainage solidification speed of a soil body is increased, and the solidification stress level in a soil body sample preparation process can be adjusted. According to the device and the method disclosed by the invention, the size of a sample tank is reduced, and meanwhile, the number of sample preparation each time is increased by preparing multiple groups of soil samples; the device has a simple structure and is convenient for operation and sample taking; and the sample preparation period is short, and secondary cutting, disturbance and waste of soil samples are effectively avoided.

The invention discloses a preparation method for processing a thin-film sample for a high-resolution transmission electron microscope by adopting an ion polishing system. The preparation method is characterized in that the thin-film sample for the high-resolution transmission electron microscope is prepared by arranging an observed position on a special sample at the middle part of an oppositely-bonded test sample by means of opposite bonding, and cooperating with a reasonable ion polishing process, thus realizing high-resolution transmission electron microscope observation on a special sample organization structure. The preparation method for the thin-film sample for the high-resolution transmission electron microscope for the special sample has following advantages: preparation for the thin-film sample for the high-resolution transmission electron microscope for the special sample (for example, a sample with a surface deterioration layer or a sample with a crack tip) is realized, and the preparation method is fast in sample preparation, expense-saving, high in success rate, and simple and practicable.

The invention discloses a remolded soil sample preparation device capable of controlling density through weight and air pressure combined loading. The remolded soil sample preparation device comprises an air pressure raising device part and a sample preparation tube part, wherein the sample preparation tube part comprises a vertically arranged sample tube; the top of the sample tube is connected with a weight through a pressure bar; the weight is arranged on a tray on the top of the pressure bar; the bottom of the pressure bar is provided with a pressing plate for pressing a soil sample in the sample tube; and the pressing plate extends into the sample tube. After weight loading is performed by using the device, pressurization is performed through an air compressor, so that the purpose of accurately controlling the density of a remolded soil sample is achieved, the sample preparation period is greatly shortened, and the remolded soil sample having a given water content or given density can be prepared according to requirements; the prepared soil sample is uniform, thereby greatly improving the reliability of experimental results; and instruments are used to realize quantitative control of the air pressure and the sample height, thereby greatly reducing various operation errors caused by artificial operation.

The invention discloses a method for detecting hollow fibrous membrane aperture performance, particularly a method capable using method in ASTM F316-03 standards to carry out performance detection on the inner-surface aperture and outer-surface aperture in a hollow fibrous membrane with the advantages of short sample preparation period, low analysis cost, objective and accurate analysis results, and simple operation. According to the invention, the process for detecting the inner-surface aperture performance comprises the following steps: cutting out a small section of the hollow fibrous membrane, sealing one end of the inner bore, and fixing a gas-guide tube communicated with the inner bore of the hollow fibrous membrane at the other end; completely putting the hollow fibrous membrane and the gas-guide tube together in an infiltration liquid to fully infiltrate to be as a sample to be detected for detecting the inner bore performance; putting the sample to be detected in a detection liquid, recording the gas pressure of a first bubble appearing at the sealed end as P2, using the P2 as the bubble point pressure corresponding to the maximum aperture of the inside bore, and calculating the maximum aperture of the inner surface by using the theoretical formula in the ASTM F316-03 standards.

The invention discloses a coal sample stir-mixing and drying device which includes: a lifting apparatus, a stirrer, a heating kettle, a sample cylinder and a controller. The stirrer is disposed on the lifting apparatus which drives the stirrer to move vertically. The heating kettle is disposed on the lifting apparatus. The sample cylinder is disposed inside the sample cylinder. The controller is connected to the heating kettle and the lifting apparatus. The stirrer comprises a stirring motor, a stirring shaft and a plurality of stirring rods, wherein the stirring motor is connected to the stirring shaft to drive the stirring shaft to rotate. The stirring rods are disposed on the stirring shaft. The stirring rods and the stirring shaft are arranged in the sample cylinder and are contacted with a coal sample. The coal sample stir-mixing and drying device can achieve integration of quick drying and mixing of the coal sample, can achieve mechanization operation replacing manual operation, can ensure representativeness of the prepared sample, can reduce labor intensity and manual influence factor, can shorten the preparation period of the sample, can increase work efficiency, and can not only achieve an integrated function of drying and mixing but also individually carrying out drying or mixing, thereby achieving multifunction.

An embodiment of the invention relates to the technical field of functional materials and particularly relates to graphene oxide aerogel, reduced graphene oxide aerogel as well as preparation methodsand applications of the graphene oxide aerogel and the reduced graphene oxide aerogel. The graphene oxide aerogel adopts a 3D network structure and comprises graphene oxide sheet layers, a gap surrounded by the graphene oxide sheet layers and double electrical chitin nanofiber located between the graphene oxide sheet layers or adsorbed on the surfaces of the graphene oxide sheet layers, and the obtained graphene oxide aerogel has anisotropy and higher compression resilience. On the basis of the graphene oxide aerogel, the reduced graphene oxide aerogel is obtained through further reduction, and the performance of the reduced graphene oxide aerogel is further optimized.

The invention discloses a mounting method, a dismounting method and a using method of a hollow cylinder sample. The hollow cylinder sample comprises an inner cylinder, a consolidation outer cylinder, a permeable top cover and a drainage chassis, wherein the inner cylinder comprises four inner cylinder assemblies which are arranged in an arc shape, fixing grooves and water permeable holes; the consolidation outer cylinder comprises two semi-circular consolidation outer cylinder assemblies, a fixing table, a fixing hole A, locking blocks, limiting grooves and limiting blocks; a through hole is formed in the center of the permeable top cover; the whole drainage chassis is in a disc shape and provided with water collecting holes. The installation and connection adopts a mortise and tenon buckling mode, so that a soil sample can be more accurately close to the required standard size; a vacuum bin with relatively high leakproofness is formed, so that water and gas can be conveniently discharged, and the water content can be more accurately controlled; and moreover, the disturbance degree on the soil sample during sample disassembly is effectively reduced, secondary cutting on the inner diameter and the outer diameter of the soil sample is avoided, and the possibility is provided for rapidly manufacturing the saturated hollow cylindrical sample with the inner diameter and the outer diameter of the international common standard at one time.

The invention discloses rapidly-molded microwave dielectric ceramic and a preparation method thereof. A biological molecular material, a plasticizer and de-ionized water are mixed to obtain a crosslinking framework for gel casting; the biological molecular material and the plasticizer can form a hydrogen bond in a solution; the hydrogen bond is used as the plasticizer to improve the strength of agreen body; independently mixing ceramic powder and the residual de-ionized water, and a condition that the ceramic powder is directly mixed with the crosslinking framework for the gel casting to generate an adhering phenomenon is avoided, so that the ceramic powder can be sufficiently and uniformly mixed with the crosslinking framework; finally, ceramic is rapidly formed at certain temperature through adhering and sintering, the sample preparation time is greatly shortened and defects caused by the fact that organic matters are not adhered completely are avoided at the same time, so that themicrowave dielectric ceramic with good performance can be obtained; compared with a sample prepared by utilizing a traditional solid-phase method utilizing the same powder, a microwave dielectric ceramic sample prepared by the method has better performance; the dielectric loss is reduced by 26.01 percent, the Q-unloaded is improved by 35.6 percent and the QF (Quality Factor) value is improved by 76.85 percent.

The invention discloses a method for detecting hollow fibrous membrane aperture performance, particularly a method capable using method in ASTM F316-03 standards to carry out performance detection on the inner-surface aperture and outer-surface aperture in a hollow fibrous membrane with the advantages of short sample preparation period, low analysis cost, objective and accurate analysis results, and simple operation. According to the invention, the process for detecting the inner-surface aperture performance comprises the following steps: cutting out a small section of the hollow fibrous membrane, sealing one end of the inner bore, and fixing a gas-guide tube communicated with the inner bore of the hollow fibrous membrane at the other end; completely putting the hollow fibrous membrane and the gas-guide tube together in an infiltration liquid to fully infiltrate to be as a sample to be detected for detecting the inner bore performance; putting the sample to be detected in a detection liquid, recording the gas pressure of a first bubble appearing at the sealed end as P2, using the P2 as the bubble point pressure corresponding to the maximum aperture of the inside bore, and calculating the maximum aperture of the inner surface by using the theoretical formula in the ASTM F316-03 standards.

The invention discloses a multifunctional natural gas hydrate synthetic reaction method and device. An aeration conduit of a CH4 gas bottle is provided with a supercharge pump; an opening part of the aeration conduit of the CH4 gas bottle is connected with a gas injection opening formed in a top cover of a reaction kettle; the reaction kettle is arranged in a constant-temperature air bathroom; a temperature probe and a pressure sensor on the reaction kettle are connected with an industrial control machine via a data acquisition unit. The multifunctional natural gas hydrate synthetic reaction method and device have the beneficial effects that hydrates of a plurality of different sediment systems can be synthesized at the same time, so that the experiment result is close to the practice; the preparation cycle of hydrate samples is shortened; the efficiency is enhanced; the accuracy and the reliability of the experiment result are increased.

The invention relates to a standardized automatic sample preparation machine for geotechnical samples. It includes: a control module, the control module includes a control terminal and a servo controller connected to the control terminal; a servo loading module, the servo loading module is controlled by the control module, which includes a piston assembly; a sample A mold module, the sample mold module is movably connected with the piston assembly, so that the piston assembly can slide in the cylinder of the sample mold module; a sensor module, the sensor module is arranged on the servo loading module and connected with the servo controller; and an upper exhaust and liquid discharge pot and a lower exhaust and liquid discharge pot connected with the sample mold module. Adopting the present invention to carry out standardized automatic sample preparation removes errors caused by manual operations, can realize the uniformity of various performances of the same batch of samples, and improve the accuracy of experimental results; Effective utilization of mechanical instruments.

The invention discloses a preparation method of a transmission electron microscope metal sample. The method comprises the steps of machining, punching an inclined hole by laser and acid-washing and cleaning an area around the inclined hole; the method is mainly suitable for conventional metals such as Fe, Mg and Ti. Particularly, the method comprises the steps of processing a metal sheet in a manner of cutting, grinding and the like through a machining method to enable the thickness of the metal sample to preliminarily reach 50-100 microns; after that, punching the inclined hole in the metal sheet at the inclination angle of 30-60 degrees by short or ultra-short pulse laser with the wavelength being less than 1064nm; and aiming at different metals, carrying out acid washing or alkaline washing on the area of the hole, punched by the laser, of the metal sheet with a proper acid or alkaline solution, immediately cleaning with a conventional organic solvent, and repeating the process of acid washing and cleaning or alkaline washing and cleaning for 1-3 times. Compared with a method for preparing a transmission electron microscope sample by ion thinning, the method has the advantages that the period is shortened, the after-treatment of the sample is simpler, and the cost is lowered.

The invention discloses a preparation method for a reconstituted sample of easily reduced and oxidized soils. The method comprises steps of: 1) cutting the sample; 2) vacuumizing; 3) freezing; 4) sublimation drying; and 5) storing. According to the invention, based on a principle that in frozen state of a soil solution, frozen ice in the soil solution is directly sublimated to be water vapor for discharge via vacuumizing to reduce pressure, thereby the soil is enabled to dry. The method is feasible, and simple in operation, and the entire sample preparation process is a vacuum state, thus preventing the impact of redox reactions on soil properties; and soil samples obtained can be used for tests of soil mechanics, physical properties, and soil properties, with significantly improved test results accuracy. The process of vacuumizing to reduce pressure improves the soil dehydration speed, greatly reducing the sample preparation cycle.

The invention provides a method for in-situ preparation of a TEM sample of nanoscale particles in samples with complex structures. The sample is placed on the sample stage in the sample cavity of the double-beam electron microscope, a copper mesh is installed on the sample stage, the sample cavity is sealed and vacuumized , use the scanning electron microscope function to observe the surface morphology of the sample, find the nanoparticle cluster area of ​​interest, keep the sample stage in a horizontal state, rely on electrostatic adsorption to adsorb the nanoscale particles to the tip of the nanomanipulator, retract the nanomanipulator, Move the copper mesh directly under the electron gun, fix the nano-scale particles adsorbed on the needle tip to the edge of the copper hole on the copper mesh by means of electrostatic adsorption force, take out the copper mesh with the fixed nano-scale particles, and complete the sample preparation. The invention can realize the preparation of TEM samples of nanoscale particles entrained in bulk samples with complex structures that cannot be polished or scarce extraterrestrial micron-scale powder samples, and can be applied to the basic research fields of planetary science and planetary exploration .

The invention discloses a detachable remolded silt hollow cylinder sample preparation device which comprises a bearing platform and outer walls, wherein a bearing platform bracket is arranged at the bottom of the bearing platform; the outer walls are fixed on two sides of the upper surface of the bearing platform; the inner sides of the outer walls are provided with a mechanical device for controlling the disassembly of a sample loading consolidation cylinder; the sample loading consolidation cylinder is arranged in the center of the bearing platform, and a hollow cylindrical drainage body concentric with the sample loading consolidation cylinder 1 is arranged in the center of the sample loading consolidation cylinder 1; the bottom of the drainage body is fixed with the drainage base on the back surface of the bearing platform and the bearing platform through fixing bolts; a drainage hole communicated with the drainage body is formed in the drainage base; and the drainage hole is connected with a drainage hose. The invention has the following technical effects: 1, the demoulding disturbance is reduced, and the uniformity of the sample is protected; and 2, moving and secondary sample cutting are avoided, and interference of other factors is avoided. The whole sample preparation process is carried out on the device bearing platform, no movement or secondary sample cutting is carried out on the sample, the sample preparation period is shortened, and the working efficiency of related tests is effectively improved.

The invention discloses a method for verifying the scrambling code address of a chip storage unit, which includes: the first step, during the mass production process of the chip, the failure defect inside the memory is captured in the online defect detection or the defect is artificially manufactured by means of focused ion bombardment or the like lead to memory failure; the second step is to record the address of the failed chip on the wafer and the physical address of the failed defect in the storage unit; the third step is to continue to complete the chip manufacturing; the fourth step is to conduct ordinary electrical tests to obtain the failure The electrical address of the unit; the fifth step, write the conversion formula according to the memory structure design and test principle to obtain the physical failure address; the sixth step, compare the above physical failure address with the physical failure address recorded in the second step. The method does not need fragments to confirm the physical address, shortens the sample preparation period, and improves the success rate of verifying the scrambled code address of the storage unit.

The invention relates to the technical field of soil sample preparation, in particular to a cylinder for drying a soil sample. A drying cylinder for carrying out radiation heating on a soil sample isa closed cylinder body made of a light-transmitting material, and during working, the drying cylinder rotates and is in a negative pressure state inside, so that water evaporation is accelerated, andthe drying speed is increased; and meanwhile, a radiation heating device is arranged outside the drying cylinder to heat a sample in the drying cylinder, so that rapid reduction of the temperature ofthe sample caused by heat absorption when the volume of gas in the cylinder is expanded due to negative pressure is eliminated, the sample in the cylinder is maintained in a reasonable interval of normal room temperature and temperature upper limit requirements related to soil sample preparation, and the sample drying efficiency is ensured. Automatic drying of the soil sample is achieved, the soilsample is evenly heated by adopting a rotary heating mode, and the soil sample can rapidly and efficiently achieve the drying degree meeting the requirement; and therefore, the sample preparation period is shortened, the occupied area for sample preparation is saved, and the sample preparation efficiency is improved.

The invention discloses a remoulding soft clay sample preparation device and a remoulding soft clay sample preparation method based on a vacuum combined electron-osmosis effect. Nonwoven geotextile, a gravel layer, a sand mat layer and an electron-osmosis cathode are sequentially paved on an osmosis drainage base; the upper and lower ends of a latex film are respectively turned outward and sleeved on a sample loading solidification cylinder and are fixed with the osmosis drainage base by a bolt through a flange; a water vapor separation cylinder is provided with an electric contact vacuum member and is connected with the osmosis drainage base and a vacuum pump respectively through an air pipe; slurry is poured into the designated height of the sample loading solidification cylinder, and an electro-osmosis anode is put in; and the electro-osmosis anode and the electro-osmosis cathode are respectively connected with a programmable direct-current power supply by wires. Under the combined effect of vacuum negative pressure and electro-osmosis, the drainage solidification speed of a soil body is increased, and the solidification stress level in a soil body sample preparation process can be adjusted. According to the device and the method disclosed by the invention, the size of a sample tank is reduced, and meanwhile, the number of sample preparation each time is increased by preparing multiple groups of soil samples; the device has a simple structure and is convenient for operation and sample taking; and the sample preparation period is short, and secondary cutting, disturbance and waste of soil samples are effectively avoided.

The invention provides a TEM sample preparation method. Based on the paraffin embedding technique, a sample is effectively prevented from being cracked or chipped during the mechanical milling and thinning process, and then the sample is directly and quickly ground to be 20-30 mum in size. In this way, the condition that a sample easily cracks or breaks down when being continuously ground to be smaller than 50 mum in size after being bonded to a copper ring according to the conventional method can be avoided. The sample preparation success rate is significantly increased, and the sample preparation period is significantly shortened. Based on the paraffin dissolving and diluting technique, the adhesive force of paraffin for the sample is lowered. Therefore, the sample can be successfully and completely transferred. According to the technical scheme of the method, the sample preparation success rate is increased from 60-70% to 90-100%. Meanwhile, the sample preparation period is shortened to be 100-180 minutes.