35results about How to "Reduce conductivity" patented technology

A pressure sensor and a pressure interface are disclosed. The pressure sensor comprises: a pressure interface, wherein the pressure interface comprises a cylindrical ceramic base and a ceramic diaphragm arranged at one end part of the ceramic base; the ceramic diaphragm is connected with the ceramic base, the strain gauge is connected with the ceramic diaphragm, and the ceramic base and the ceramic diaphragm are integrally manufactured. As the pressure sensor adopts the ceramic base and the ceramic diaphragm which are integrated, additional assembly and sealing are not needed, the risk of leakage is avoided, and the cost is low at the same time. Moreover, the pressure sensor is made of a ceramic material which is in contact with the pressure medium, so that the pressure sensor can be applied to corrosive pressure media and the like.

This invention proposes a lithium-ion battery electrolyte and its application. The electrolyte comprises at least the following components: a fluorinated solvent, including 2,2-difluoroethyl acetate, fluoroethylene carbonate, and 2,2-difluoroethyl ethyl carbonate; a lithium salt, including a first lithium salt comprising lithium hexafluorophosphate; and an additive, including a first additive comprising lithium difluorobis(oxalato)phosphate. The lithium-ion battery electrolyte and its application proposed in this invention can improve the electrolyte's high-voltage resistance and kinetic performance, reduce battery impedance, and enhance the battery's fast-charging performance and high-temperature cycle stability.

The invention provides a current collector and a battery, which can reduce the weight of the current collector and the battery provided with the current collector while inhibiting the reduction of the conductivity of the current collector, and can inhibit the reduction of the thermal conductivity of the current collector. A current collector (100A) is provided with a support layer (110) and a conductive layer (120). The support layer (110) is configured from a resin composition having electrical insulating properties. The conductive layer (120) is laminated on the support layer (110). The conductive layer (120) is made of an alloy containing elemental magnesium, elemental aluminum, and elemental calcium.

This invention relates to a non-contact, low-temperature, intermittent heat exchange pulsed-dynamic electrolytic machining apparatus and method, belonging to the field of electrolytic machining. The apparatus consists of a blade workpiece, a cathode plate, a cathode holder, and an insulating sleeve. The cathode plate undergoes high-frequency reciprocating vibration during radial feeding, coordinated with the synchronous switching of a pulse power supply, to achieve pulsed-dynamic electrolytic machining. In this pulsed-dynamic electrolytic machining method, the cooling medium flows into the insulating sleeve from the inlet of the cooling channel, flows through the cooling channel, and then flows out from the outlet of the cooling channel, reducing the temperature inside the insulating cavity. As the blade is shaped and enters the insulating cavity, the cooling medium undergoes convective intermittent heat exchange with the stray electrolyte within the cooling channel, reducing the temperature and conductivity of the stray electrolyte, and even freezing the stray electrolyte, creating a low-temperature environment around the shaped blade and inhibiting the electrolytic reaction in the stray corrosion zone. Pulsed-dynamic machining promotes the removal of electrolytic products and heat, further improving machining accuracy and surface quality.

The invention relates to a preparation process for producing water for injection based on a hollow fiber deoxidation membrane, and belongs to the technical field of preparation of water for injection medicines. According to the preparation process of the water for injection, dissolved oxygen in a water body can be stably removed, reproduction of microorganisms, bacteria and the like in the water can be effectively restrained by strictly controlling the content of oxygen and carbon dioxide in the water, meanwhile, due to removal of carbon dioxide in the water body, the conductivity of the water body is further reduced, the pH value of the finished water is stabilized to be 6.5-7.5, and the water quality is improved. The related industrial standards of the water for injection are met, and the content of microorganisms and endotoxin meets the strict requirements of the 2025 edition pharmacopoeia. Compared with a traditional distillation method, the membrane method integration process does not need to consume a large amount of industrial steam, energy consumption can be remarkably reduced, and the operation cost is reduced; by optimizing the position of the hollow fiber deoxidation membrane device, the water quality and the storage stability of the water for injection can be improved, and the production cost and the maintenance cost can be reduced.

The present invention relates to an aluminum alloy disc blank for a magnetic disc, characterized by being formed of an aluminum alloy containing Mg: 3.40 to 3.90 mass%, the balance consisting of Al and unavoidable impurities, the aluminum alloy disc blank for a magnetic disc having an electrical conductivity of 36.0% IACS or more.

The invention discloses a Ce-based alloy sputtering target and a preparation method thereof, the sputtering target comprises any one of Sm, Gd and Y, and further comprises Ce and inevitable impurities, the content range of the Sm, Gd or Y element is 5-25 atom%, the impurities comprise C, S and O, and the Vickers hardness of the sputtering target is greater than 35 Hv. The Ce-based alloy sputtering target provided by the invention solves the problems that the existing Ce-based alloy target is easy to oxidize in the sputtering process, the sputtering rate is unstable, the formed CeO2-based electrolyte film is not compact and the like.

The present invention relates to a graphene material. Disclosed are a graphene powder and its preparation method and application. The graphene powder is a stack of graphene sheets. The graphene powder involves in its Raman spectrum a D peak and a G peak with peak heights of ID and IG respectively, where ID / IG is 0.10 or less. The graphene powder in accordance with the present disclosure can be applied in conductive composite materials, anti-corrosion coatings, heat dissipation composite materials. In particular, when used in lithium-ion batteries, it can significantly reduce electrode internal resistance and improve battery stability at any current rates.

This invention belongs to the field of papermaking and provides a high-efficiency antibacterial and mildew-resistant liquid crystal glass spacer paper and its preparation method. It includes: (1) Base paper preparation process: 100% bleached softwood pulp is selected as fiber raw material, pulped to 22-28°SR, without adding any wet end additives to ensure the cleanliness of the base paper, formed on the wire in the headbox, and then dewatered in the press section to obtain a basis weight of 48-52 g / m 2 (2) Surface treatment process: Select hydrophobically modified polyvinyl alcohol, mildew inhibitor and water-resistant agent to prepare surface sizing solution, the concentration of surface sizing solution is 2-4%, and apply sizing solution to the surface of the base paper, the amount of sizing is 0.8-2g / m 2 After drying in a drying cylinder, the material is calendered and then rolled to obtain a high-efficiency antibacterial and anti-mildew liquid crystal glass spacer. The liquid crystal glass spacer prepared by this method has good hydrophobic properties and anti-mildew effect, while also taking into account the characteristics of high cleanliness, low electrical conductivity, and high surface strength.

The invention discloses a wild lespedeza seed dormancy breaking and germination accelerating method, and belongs to the technical field of plant seed breeding. The method comprises the steps of physical skin breaking, surface cleaning and disinfection, warm water seed soaking, chemical dormancy breaking, gradient germination accelerating, batch sowing and intelligent water and fertilizer management. Aiming at the problems of low natural germination rate, irregular seedling emergence and the like caused by double obstacles of hard seed coats and shallow physiological dormancy of wild lespedeza seeds, the method synchronously breaks the double dormancy obstacles through a multi-stage synergistic mechanism of constructing a moisture permeation channel through physical coat breaking, breaking dormancy through chemical dormancy breaking and simulating environmental signals through gradient germination acceleration, and the germination rate of the wild lespedeza seeds is improved. The seed germination rate and the seedling emergence uniformity are effectively improved, and mildewing is inhibited. The method is stable in process, high in operability and suitable for large-scale seedling raising of the wild lespedeza, and reliable technical support is provided for ecological restoration engineering.

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 application relates to the field of solar cells, and particularly to a solar cell and photovoltaic module. The solar cell includes: a substrate; a tunneling dielectric layer and a doped conductive layer located on the surface of the substrate, the tunneling dielectric layer being located between the doped conductive layer and the substrate, the doped conductive layer containing a dopant element, the dopant element being N-type or P-type, the doped conductive layer having a plurality of spaced-apart first heavily doped regions extending along a first direction, the doping concentration in the first heavily doped regions being greater than the doping concentration in the doped conductive layer excluding the first heavily doped regions; a passivation layer located on the surface of the doped conductive layer away from the substrate; and a plurality of spaced-apart electrodes extending along a second direction, the electrodes penetrating the passivation layer and contacting the doped conductive layer, with at least two first heavily doped regions contacting the same electrode. This application embodiment is beneficial for improving the photoelectric conversion efficiency of passivated contact solar cells.

The invention discloses a preparation method and application of a rare earth magnesium alloy surface micro-arc oxidation film layer manufactured through electric arc additive manufacturing, and relates to the technical field of additive manufacturing light metal surface treatment. The preparation method comprises the following steps: manufacturing a rare earth magnesium alloy through electric arc additive manufacturing; carrying out homogenizing heat treatment on the rare earth magnesium alloy subjected to electric arc additive manufacturing; performing earlier-stage treatment; preparing an inner-layer alkaline electrolyte and an outer-layer alkaline electrolyte; and step-type voltage micro-arc oxidation treatment: taking stainless steel as a cathode, taking the magnesium alloy as an anode, sequentially putting the stainless steel and the magnesium alloy into the inner-layer alkaline electrolyte and the outer-layer alkaline electrolyte for micro-arc oxidation, cleaning and drying to obtain a micro-arc oxidation film layer on the surface of the magnesium alloy. According to the preparation method, the problems that a traditional micro-arc oxidation coating is loose, porous, prone to corrosion and short in service life are solved, the corrosion resistance of the magnesium alloy is effectively improved, the magnesium alloy is prevented from volatilizing under the high-temperature condition, the working requirement of a satellite support in the space environment is met, and the application range of the magnesium alloy is widened.

The application discloses a method for preparing electronic-grade insulating pulp from bamboo, and relates to the technical field of insulating pulp production and preparation, and comprises the following preparation steps: step A, collecting bamboo raw materials in Hunan area; step B, flaking operation, bamboo is flaked and cut into pieces in a bamboo processing factory; step C, water washing operation, bamboo pieces are washed to balance water content; step D, cooking operation, bamboo pieces are cooked by adopting sulfite process, and the yield of the crude pulp is controlled to be 40-50%; step E, screening operation; step F, beating operation; step G, sheeting operation and strength detection. The method for preparing electronic-grade insulating pulp from bamboo has certain regionalism by adopting locally planted bamboo in Hunan, the prepared electronic-grade insulating pulp reaches the superior standard, and the prepared electronic-grade insulating pulp has the quality index that the conductivity is less than 3 us / cm by adopting deionized water for washing in the whole process.

The present invention relates to a method for manufacturing a sulfide-based solid electrolyte powder to be used in a lithium-ion secondary battery, the method including, in order: obtaining a sulfide-based solid electrolyte that contains Li, P, and S and that includes a crystalline phase and / or an amorphous phase; pulverizing the sulfide-based solid electrolyte in an atmosphere ranging from 40°C below the dewpoint to -60°C to produce a powder; and drying the powder with heat, the pulverization being carried out using a non-aqueous organic solvent, and x and y satisfying a specific relationship, where x (ppm) is the concentration of moisture included in the non-aqueous organic solvent, and y (g / m3) is the concentration of moisture in the heating space used when drying the powder with heat.

This invention discloses a lithium-doped crystalline silicon photovoltaic cell, silicon wafer, ingot, and doping method thereof, belonging to the field of photovoltaic cells. By combining appropriate amounts of impurity lithium and impurity boron with lithium to form p-type first lithium silicon, lithium, with an electronegativity of only 0.98, saturates some of the boron atom holes when not exposed to high-energy space radiation. Upon exposure to high-energy space radiation, on the one hand, the outer electrons of lithium are easily attracted by electron traps, objectively passivating the electron traps and "releasing" the boron atom holes. As a result, the majority carrier holes in the p-type silicon material increase, and the conductivity increases instead of decreasing. On the other hand, due to the "accompaniment" of positive lithium ions to the electron traps, the probability of the electron traps capturing photogenerated minority carrier holes is greatly reduced, which is beneficial to improving the photoelectric conversion efficiency of the space cell.

This disclosure provides a method for fabricating a laser chip. An electrically isolated layer group comprising a first N-type InP layer, a second N-type InP layer, and a first active layer are sequentially grown on a substrate. A second active layer is grown outside a first position of the first active layer. First and second electrically isolated layers and a conductive layer are grown at the interface between the first and second active layers. Second and third P-type InP layers and a contact layer are sequentially grown on the first active layer, the conductive layer, and the second active layer. A second position of the contact layer is etched down to the third P-type InP layer. Both the first and second contact layers are etched down to the first N-type InP layer. A passivation layer is grown and etched down to the first and second contact layers and the first N-type InP layer. Positive and negative electrodes are grown. In this disclosure, the substrate is conductive, avoiding the problem of charge accumulation on the substrate surface leading to internal electric field distortion. The electrically isolated layer group prevents current from flowing from the second N-type InP layer into the substrate. The first N-type InP layer is conductive, enabling the positive and negative electrodes to conduct.

This invention relates to a method for improving the texture orientation and processing properties of Fe-6.5%Si steel, belonging to the field of material modification technology. It includes composition adjustment, determining the normalization temperature range and cooling medium, cold rolling and annealing treatments, calculating the lattice slip energy of the cold-rolled non-oriented steel sheet, electrical pulse modification, and temperature control. This invention alters the magnetic and deformation properties of Fe-6.5%Si alloys through the addition of alloying elements and pulsed current treatment, resulting in low-iron-loss, low-noise, high-silicon electrical steel for power transformers that can be produced using rolling processes. The silicon steel sheets prepared using this invention have been validated in engineering applications. Third-party testing has shown that their performance indicators meet the requirements for silicon steel sheets used in transformers, demonstrating strong engineering practicality and enabling actual industrial production.

The application discloses a MOS device bias voltage dynamic regulation method for inhibiting hot carrier effect, relates to the MOS device regulation technical field, and can further refine the safe working area which originally only stays in the static boundary level into the boundary range allowed to pass and the local high-risk section needing to be avoided by forming a safe working area boundary set Safe and a high-risk section set Risk, form a target bias track result Path, can actively guide the running path into the range allowed by the safe working area boundary set Safe under the premise of meeting the opening, maintaining and shutting down function requirements, and bypass the dangerous positions marked by the high-risk section set Risk, so that the bias regulation is no longer simple voltage reduction or fixed voltage limiting, and output the track execution result Resu and use it for correction, so as to continue feeding back the real execution situation in the current driving period to the subsequent driving period.

The utility model discloses a pure water treatment device for a sucrose detection laboratory. The pure water treatment device comprises a tap water storage tank, a plurality of delivery pumps, a first buffer tank, a multi-stage multi-medium filter, a multi-stage activated carbon filter, a multi-stage reverse osmosis filter, a second buffer tank, an evaporation tank, a condensation tank and a third buffer tank, the tap water storage tank is communicated with the first buffer tank through a pipeline, and a delivery pump is arranged on the communicating pipeline; the first buffer tank is communicated with the first-stage multi-medium filter through a pipeline, and a delivery pump is arranged on the communicating pipeline; the multi-medium filter, the active carbon filter and the reverse osmosis filter are connected in series; the multi-stage multi-medium filters are connected in series; the multi-stage activated carbon filters are connected in series; and the multi-stage reverse osmosis filters are connected in series. A tap water storage tank is respectively connected with a multi-stage multi-medium filter, a multi-stage activated carbon filter and a multi-stage reverse osmosis filter in series, water subjected to reverse osmosis treatment is introduced into an evaporation tank through a pipeline, and the evaporation tank is communicated with a condensation tank, so that pure water of which the conductivity meets the detection requirement is prepared.

The utility model belongs to the field of energy absorption structure manufacturing, and provides a porous material manufacturing device based on metal filings. The device comprises a device body and two electrodes installed at the upper end and the lower end of the device body. The upper and lower ends of the device body are respectively provided with an L-shaped mounting groove, and the side wall of the device body is provided with a temperature measuring port. Electrode water inlets and outlets are formed in two ends of the electrode, and an electrode water cooling cavity is formed in the electrode; a plurality of partition plates are arranged in the electrode water cooling cavity; one end of the electrode is provided with an electrode bolt and a nut; and the electrode is fixed in the L-shaped mounting groove through the electrode water inlet / outlet.

Provided is a positive electrode for a lithium-sulfur secondary battery comprising a positive electrode active material, an electrically conductive material, a binder, and a multivalent metal salt. The multivalent metal salt comprises a cation of a metal selected from a group consisting of metals having 3 to 6 of an effective nuclear charge of outermost electrons in the 3rd and 4th periods. The positive electrode for the lithium-sulfur secondary battery can improve the performance of the lithium-sulfur secondary battery by introducing a multivalent metal salt and thus effectively inhibiting the leaching of lithium polysulfide when applied to the battery while not significantly increasing the weight of the electrode and not significantly lowering the conductivity of the electrode.

The application discloses a port equipment state linkage early warning method based on full life cycle information association and belongs to the technical field of safety monitoring and early warning. The method comprises the following steps: data acquisition and multi-source association, equipment node risk calculation, operation chain graph construction and link sensitivity analysis, hierarchical early warning triggering, local intervention execution and rewriting. The application collects full life cycle data of port equipment, calculates a port equipment node risk value in combination with a dynamic weight, establishes an operation chain graph to analyze link sensitivity, adjusts operation order, equipment load and operation rate according to a risk level or switches to a backup operation scheme, achieves the effects of dynamic intervention on a high-risk link, downstream operation guarantee and operation safety and efficiency improvement, and solves the problem in the prior art that when potential risks occur due to the simultaneous action of equipment state abnormalities, environmental changes and operation plan adjustment on multiple devices, operation order and scheduling strategies cannot be dynamically optimized, safety and efficiency cannot be simultaneously guaranteed.

The application discloses a method for improving heat tolerance and fruit quality of pepper by using melatonin treatment, and belongs to the technical field of agricultural plant cultivation. The method comprises spraying a melatonin solution with a concentration of 50-200 micromoles per liter to the pepper seedlings in the seedling stage and the flowering and fruit setting stage, and preferably spraying the melatonin solution with a concentration of 150 micromoles per liter. The application can effectively alleviate the wilting and yellowing of seedling leaves caused by high temperature, improve the fresh weight, dry weight, plant height and root growth index of the seedlings, and reduce the damage degree (relative conductivity) of the cell membrane. Meanwhile, the application can significantly improve the number of flowers and the fruit setting rate under high temperature, reduce the rate of sunburned fruits, increase the weight of single fruit and the length of the fruit, and significantly improve the content of nutritional substances such as soluble protein, vitamin C, soluble sugar, total flavonoids and total phenols in the fruit. The application is simple and safe, and has a significant effect on improving the heat tolerance, yield and quality of the pepper under high temperature stress.

This invention provides a method for preparing a K2CrO4-regulated SnO2 composite electron transport layer, comprising: S1 dissolving urea in deionized water, adding thioglycolic acid, hydrochloric acid solution and SnCl2·2H2O to the deionized water to obtain a SnO2 precursor solution; S2 immersing a pretreated conductive glass substrate in the diluted SnO2 precursor solution for a first heating reaction to obtain a deposited SnO2 conductive glass substrate; S3 adding a K2CrO4 aqueous solution to the deposited SnO2 conductive glass substrate for a second heating reaction to obtain a deposited SnO2 / K2CrO4 conductive glass substrate; and S4 washing and annealing the deposited SnO2 / K2CrO4 conductive glass substrate to form a K2CrO4-regulated SnO2 electron transport layer. Introducing K2CrO4 as an oxidizing additive during the chemical bath deposition process allows for the synergistic regulation of the crystallization process, electrical properties, and band structure of SnO2ETL. This results in a K2CrO4-regulated SnO2 electron transport layer with low trap density, high conductivity, and ideal energy level arrangement, significantly improving the photoelectric conversion efficiency of perovskite solar cells and enhancing their operational stability and lifespan.

The application discloses a method for preparing gamma-cyclodextrin by precipitation technology and enzyme method, and comprises the following steps: taking gamma-cyclodextrin mother liquor prepared by a solvent method and enzyme method as a sample solution; under high-temperature conditions, first, a complex formed by the gamma-cyclodextrin and a reaction aid is dissociated; then, a precipitation separation technology is used; and finally, an inorganic salt precipitant is added to effectively separate a reaction agent, so that the purification of a target product is realized, and a high-efficiency and simple gamma-cyclodextrin separation and purification method is established. By using the method, the total conversion rate of the gamma-cyclodextrin can reach about 53.89%, the recovery rate of the gamma-cyclodextrin after separation can reach 82.76% to 90.84%, the purity is 92.56% to 95.63%, and the residual amount of the reaction aid is 0.02%.

The invention relates to the technical field of oil and gas resource development, in particular to a preparation method of an ultra-light ceramsite proppant for long-distance conveying and filling. The method comprises the steps that after green pellets are prepared, polysilicate precursor sol is sprayed and permeated for several times to conduct surface modification on the green pellets, then pseudo-boehmite sol and alpha-phase nanometer aluminum oxide dispersion liquid are sprayed and added in sequence, mullite crystal nucleus powder is embedded, and finally segmented oxidation presintering and high-temperature sintering are conducted. According to the method, a compact strengthening layer formed by a mullite crystal framework is constructed on the surface layer of a propping agent particle, and a porous light structure is reserved inside, so that low density, high crushing resistance and long-term flow guide stability are effectively considered, and the method is particularly suitable for long-distance conveying and filling operation of low-viscosity slick water fracturing fluid.

The invention discloses a cooling liquid for a data center. The cooling liquid is prepared from the following components in percentage by mass: 0.03 to 0.06 weight percent of corrosion inhibitor, 0.01 to 0.05 weight percent of bacteriostatic agent, 25 to 30 weight percent of antifreezing agent, 0.01 to 0.02 weight percent of organic alkali, 0.0001 to 0.001 weight percent of defoaming agent, 0.0001 to 0.001 weight percent of pigment and the balance of water. Through the synergistic effect of the nonionic corrosion inhibitor and the bacteriostatic agent which are compounded from three components, the corrosion inhibition performance of the cooling liquid is remarkably enhanced while efficient bacteriostasis is achieved, and the cooling liquid is good in compatibility with metal materials and non-metal materials, low in conductivity and excellent in reserve alkalinity and hard water resistance.

The application provides a last-effect steam purification system for high-salt wastewater multi-effect evaporation and a use method. The last-effect steam purification system for high-salt wastewater multi-effect evaporation comprises a multi-effect evaporation device, a spray washing device and a condenser. The multi-effect evaporation device comprises a last-effect evaporator and a last-effect heat exchanger. The spray washing device comprises a spray shell and a spray head. The condenser is connected with a spray steam outlet. An outlet of the condenser is connected with a condensate tank so as to pass condensate into the condensate tank. The last-effect steam purification system for high-salt wastewater multi-effect evaporation can utilize waste heat of a multi-effect evaporation system to realize last-effect steam condensate water quality, and expand a last-effect steam condensate recycling scene and range.

The present application relates to the technical field of electronic packaging interconnection, and discloses a multi-scale copper sintering paste, a preparation method and application thereof.A multi-scale copper sintering paste is composed of 85wt.% of multi-scale copper particles and 15wt.% of raw materials of an organic system.The multi-scale is a mixture of nano-scale, sub-micron scale and micron scale; and the organic system includes a solvent, a diluent, a dispersant and a binder.The multi-scale copper sintering paste of the present application realizes low-temperature dense sintering interconnection by using multi-scale copper particles for dense packing, and can obtain an interconnection head with high strength (≥90MPa), high thermal conductivity (≥300W / m·K) and high electrical conductivity (≥1×10 7 S / m), which meets the process and performance requirements of third-generation semiconductor chips and electronic packaging interconnection.