80results about How to "Low process conditions" patented technology

The invention relates to a lithium-enriched manganese-based material precursor which is a lithium-enriched manganese-based carbonate precursor of a lamellar morphology, the particle size of the precursor is 1-7mu m, and the specific surface area of the precursor is 8-50m<2>/g. By adopting the lithium-enriched manganese-based carbonate precursor of the lamellar morphology, a lithium-enriched manganese-based anode material of a high single crystallization degree can be easily prepared. The invention further relates to a preparation method of the lithium-enriched manganese-based carbonate precursor of the lamellar morphology, and a preparation method and the application of the lithium-enriched manganese-based anode material of a single crystal morphology. Therefore, the mechanical strength, the stability, the compaction density, the capacity and the first efficiency of the micro structure of the anode material can be improved, and the voltage attenuation of the material can be inhibited.

The invention provides an inner coating for improving glazing property of turned carbon-containing fireproof material. The coating is prepared by uniformly mixing the following components in percentage by weight: 10-40% of bonder, 1-15% of dispersant, 10-80% of filler made of fireproof material and 10-30% of water. The components of the filler made of fireproof material are consistent to the components of the fireproof material to be turned. The coating provided by the invention mainly has the beneficial effects that the filler made of fireproof material in the using process has the effect of repairing surface pits of the carbon-containing fireproof material so as to further improve the coating of the outer antioxidant coating, so that the glazing and glaze burning condition as well as later burning effect are improved.

The invention discloses a preparation method for a tungsten-oxide-nanosheet-structured gas sensor working at room temperature. The preparation method comprises the steps that a ceramic wafer substrate is cleaned, a platinic interdigital electrode is prepared on the ceramic wafer substrate, a solvothermal reaction solution is prepared, a tungsten-oxide-nanorod-structured gas sensor is prepared through a solvothermal method, an aluminum oxide substrate after a solvothermal reaction is cleaned, and thermal treatment is performed on elements of the tungsten-oxide-nanorod-structured gas sensor. According to the preparation method, the tungsten-oxide-nanosheet-structured gas sensor can be prepared at low cost. According to the solvothermal method, operation is easier, the technological conditions needing to be controlled are few, and no pollution to the environment is generated. The preparation method for the tungsten-oxide-nanosheet-structured gas sensor which can detect nitrogen oxide gas with the extremely low concentration (can reach 0.1 ppm) and is high in sensitivity and rapid to respond/recover is supplied, and the important practice and research significances are achieved.

The invention discloses a production method of a nitric oxide gas sensor element, which comprises the steps of 1, cleaning an n type single-face polished monocrystalline silicon piece; 2, producing silicon substrate hole-order porous silicon with hole size of 50-200nm on the polished surface of the silicon piece by adopting a double-groove electrochemical corrosion method, wherein a corrosion solution is a hydrofluoric acid water solution with concentration of 6-8 percent, the density of the applied corrosion current is 115-135mA/cm<2>, and the corrosion time is 5-25min; and 3, placing the porous silicon in a vacuum chamber of an ultrahigh vacuum facing-target magnetron sputtering device, and producing the nitric oxide gas sensor element based on the silicon substrate hole-order porous silicon. The production method has the advantages of simpleness, flexibility, adjustability, less process conditions and easiness in control; and the nitric oxide gas sensor element has the advantages of high sensitivity, high selectivity, quick response/recovery characteristic and good repeatability under the conditions of room temperature and extreme low concentration (0.1ppm).

The invention provides a method for preparing aluminium fluoride by utilizing low grade bauxite. The method mainly comprises the following steps: hydrochloric acid leaching to remove iron, stirring and ball kneading, high-temperature roasting to remove silicon, ultrasonic hydrofluoric acid washing and concentrated sulfuric acid washing to remove titanium. The method has the beneficial effects that the problem of how to effectively remove the impurities in the low grade bauxite, such as iron, silicon and titanium, to prepare fine aluminium fluoride is solved through the steps, so that the active ingredients in the low grade bauxite are fully utilized, thus improving the product quality and reducing the resource waste; and the method provided by the invention dispenses with pretreatment of the low grade bauxite, is mild in process conditions and is suitable for large-scale production.

The invention discloses a synthetic method of single-layer porous molybdenum disulfide. In an inert atmosphere, common sulfur powder and MoO3 are adopted to serve as raw materials, the single-layer porous MoS2 grows by the use of a chemical vapor deposition method in the single-temperature region, and the pore diameter is in a nanometer scale; the temperature in the deposition process is controlled to be 650 DEG C at the room temperature, the temperature rising rate cannot be excessively high, the optimal temperature rising rate is 10 DEG C/min, the deposition time is controlled to range from5 minutes to 15 minutes, and preparation of the single-layer porous MoS2 can be accomplished; and strict control over the single-layer porous MoS2 is achieved through ultrasonic cleaning treatment ofa substrate and optimization of preparation parameters such as the sulfur group elemental powder consumption amount, the growth temperature and the growth time.

The invention discloses a preparation method of a porous-silicon-based and multi-dimensional tungsten-oxide composite structure, which adopts a hydrothermal method to grow a multi-dimensional nano structure of tungsten oxide on ordered porous silicon and provides the novel porous-silicon-based and multi-dimensional tungsten-oxide composite structure simple in manufacturing process and controllable in morphology. The hydrothermal method is simpler in operation and fewer in process conditions needing to be controlled and has no pollution to the environment. In addition, the prepared porous-silicon-based and multi-dimensional tungsten-oxide composite structure has higher specific surface area; simultaneously, the ordered tungsten-oxide nano-rod array is more beneficial to absorption and free diffusion of gas; and the porous-silicon-based and multi-dimensional tungsten-oxide composite structure has important practice and research values in the aspects of reducing the working temperature of a gas-sensitive sensor and improving the sensitivity and the selectivity of the sensor.

The invention discloses a preparation method of a single-layer ordered silicon dioxide nanosphere array. The preparation method comprises the following steps of sapphire substrate cleaning; drainage sheet cleaning; single-layer SiO2 nanosphere preparing, wherein a drainage sheet is taken out and obliquely inserted into a certain amount of deionized water, a newly-prepared SiO2-absolute ethyl alcohol solution is dropwise added to the drainage sheet to form a single-layer SiO2 array, then a lifting solution is prepared, after standing is conducted till the liquid level is stable, a Al2O3 substrate is lifted through a coating lifting machine, standing is conducted till the Al2O3 substrate is dried, and then the single-layer SiO2 nanosphere array is formed on the Al2O3 substrate. According to the method, the single-layer ordered silicon dioxide nanosphere array is prepared through a draining, dispersing and lifting method at room temperature, and the prepared SiO2 nanosphere array is single in layer and compact in arrangement, can serve as a mask plate for the following process to prepare the large-area periodic and ordered nanoparticle array and prepare and research biological chips, optical devices and nanometer devices and is short in needed cycle and low in cost.

The invention provides a method for preparing taurine. The method comprises the following steps: carrying out an addition reaction on ethylene oxide and sodium hydrogen sulfite in the presence of a heterogeneous catalyst so as to obtain sodium hydroxyethyl sulfonate at high selectivity; carrying out an ammonolysis reaction on the synthesized sodium hydroxyethyl sulfonate under catalysis of a homogeneous catalyst; and neutralizing, crystallizing, separating and the like, thereby obtaining the finished taurine. Compared with the traditional production process, the process disclosed by the invention has the advantages that by-products in the addition reaction process can be obviously reduced, the temperature and pressure of the ammonolysis reaction are reduced, the reaction time is shortened,and industrial production is easily realized.

The invention belongs to the technical field of catalysts. The invention provides an ammonium molybdate modified catalyst. The ammonium molybdate modified catalyst comprises ammonium molybdate modified ferrous disulfide and molybdenum disulfide in a mass ratio of (9.5-10.5) : (1.5-2.5). Molybdenum disulfide is added into the catalyst, sulfur defects are easily formed in a hydrogen peroxide solution, sulfur defects and Fe < 2 + > double active sites promote decomposition of hydrogen peroxide to oxidize and decompose organic pollutants, ammonium molybdate increases the number of active sites of ferrous disulfide, and the catalytic efficiency is improved; meanwhile, on the basis of self-repairing, Fe < 3 + > on the surface of the catalyst is promoted to be converted into Fe < 2 + > due to existence of sulfur defects, so that the purpose of circulation is achieved, and secondary pollution cannot be caused in the whole sewage treatment process. The invention further provides a preparation method of the catalyst, ammonium molybdate modified ferrous disulfide and molybdenum disulfide are combined by adopting a ball milling process, the process is simple, the technology is mature, and the catalyst is suitable for large-scale popularization.

The invention provides a process for preparing polybutylcyanoacrylate nanoparticles (CTAB-PBCA-NP), which comprises, dissolving Twain-80 into right amount of water, stirring at constant temperature, charging alpha-butylcyanoacrylate monomer, centrifuging, filtering the supernatant fluid, removing supernatant fluid, obtaining PBCA-NP colloid storage liquid and diluting, charging into aqueous solution of cetyltrimethyl-ammonium bromide (CTAB), stirring at room temperature, centrifuging to remove the supernatant fluid, finally drying.

The invention discloses a preparation method of granular sucralose. The preparation method comprises the following steps: (1) mixing sucralose with a binder to form a mixture; (2) granulating the mixture; (3) drying wet granules to obtain granular sucralose; (4) classifying the dried granules to obtain granular sucralose in one or more granularity ranges; (5) circulating and feeding one part or all classified granules in the one or more granularity ranges to the step (1). The prepared granular sucralose disclosed by the invention has the granularity range within 400 meshes, and is relatively excellent in properties such as thermal stability, fluidity, dissolving performance and caking resistance. The preparation method disclosed by the invention is small in number of process conditions, easy to operate, low in equipment requirement, and applicable to production and amplification.

The invention discloses a composite salt-resistant thickening agent, which belongs to the field of daily chemicals. The composite salt-resistant thickening agent consists of xanthan gum, guar gum and sodium alginate, wherein the weight ratio of the xanthan gum to the guar gum to the sodium alginate is (5-8):(2-5):(1-3); and the composite salt-resistant thickening agent is prepared by the following steps of: dissolving the xanthan gum, the guar gum and the sodium alginate into water in turn; stirring and uniformly mixing; adjusting to the concentration for use by using water; and adjusting pH value to be 6 to 8; and heating at the temperature of between 50 and 80 DEG C for 10 to 60 minutes. The amount of the used thickening agent is 0.01 to 1.0 percent of the weight of the salt-containing daily chemical. The composite salt-resistant thickening agent has acid and alkali resistance, high temperature resistance, anti-freezing effect and does not have toxic or side effect, is excellently matched with a common surfactant (such as sodium alcohol ether sulfate AES, sodium ammonium dodecyl sulfate K12A and the like) in the daily chemical and has the advantages of simple manufacturing process, low technological condition and low comprehensive cost.

The invention discloses a method for improving visible light transmittance of a vanadium dioxide film by using dilute sulfuric acid etching. A vanadium dioxide film, prepared through combining magnetron sputtering and rapid annealing, is etched by adopting a dilute sulfuric acid treatment mode, and the continuous planar vanadium dioxide film is etched into separate particles in an acid treatment manner in a whole preparation process, so that the porosity of the film is improved. According to the method disclosed by the invention, required process conditions are low and are easily controlled, and the visible light transmittance of VO2 can be effectively improved. A vanadium metal film is sputtered firstly, then, thermal annealing oxidation is carried out, and finally, soaking etching is carried out by using dilute sulfuric acid, so that the manufacturing cost is low, and the method is applicable to large-batch industrial production.

The invention discloses a matrix for machine-transplanted rice seedlings and a preparation method thereof. The preparation method comprises steps of firstly, preparing the following raw materials: 75.5-82.2 parts of yellow mud, 7.6-14.8 parts of refined organic fertilizer, 0.4-0.7 part of urea, 1.5-3.3 parts of calcium superphosphate, 0.5-0.8 part of potassium chloride and 4.5-8.2 parts of rice hull ash; secondly, smashing the yellow mud, sieving by a sieve with pore diameter of 4-8mm; thirdly, uniformly mixing and stirring the raw materials; fourthly, piling up the uniformly mixed material for 15-40 days so as to obtain the matrix for the machine-transplanted rice seedlings; fifthly, 6-8 days before seeding, spraying dexon solution onto the matrix for the machine-transplanted rice seedlings to disinfect the matrix. The raw materials are abundant and cheap, and the machine-transplanted rice seedlings cultivated by the matrix are strong and have firmly coiled root systems.

The invention discloses a preparation method of a multilayer ceramic circuit board. The multilayer ceramic circuit board is formed by stacking and bonding a plurality of electroplated ceramic substrates (DPC). The method comprises the following steps: firstly, preparing a DPC ceramic substrate containing a surface circuit layer and vertical interconnection metal columns through a pattern electroplating process; then preparing a metal solder on the circuit layer of the DPC ceramic substrate, stacking and aligning a plurality of DPC ceramic substrates, and then bonding to realize mechanical stable connection and electric interconnection between the DPC ceramic substrates; and finally, filling high-temperature-resistant insulating glue between the DPC substrates, and curing to obtain the multi-layer ceramic circuit board. By utilizing the characteristics of good heat conduction/heat resistance, high pattern precision, vertical interconnection and the like of the DPC ceramic substrates, mechanical connection and electric interconnection between the DPC substrates are realized through metal bonding, the multilayer ceramic circuit board with high reliability and high precision is prepared, and the requirements of miniaturization and integrated packaging of power devices are met.

The invention provides nanometer waterproof liquid for electronic products. The nanometer waterproof liquid comprises, by weight, 1%-5% of liquid silicone rubber, 94%-98% of No.70 alkane solvent oil, 0.2%-0.6% of tween 60 and 0.2%-0.6% of polyethylene glycol. The liquid silicone rubber is used as a waterproof agent, the No.70 alkane solvent oil is used as a solvent, the tween 60 is used as a surfactant A, and the polyethylene glycol is used as a surfactant B. The invention further provides a waterproof method for the electronic products. The waterproof method is implemented by the aid of the nanometer waterproof liquid for the electronic products. The waterproof method includes steps of 1, arranging the electronic products in sealing bins of special nanometer waterproof coating machines for mobile phones; 2, striking the nanometer waterproof liquid for the electronic products by the aid of high-pressure gas, atomizing the nanometer waterproof liquid, ejecting the nanometer waterproof liquid, filling the sealing bins with the nanometer waterproof liquid and converting the nanometer waterproof liquid in a liquid state into waterproof liquid in a nanometer-scale gas state; 3, carrying out vacuum suction, forming a layer of waterproof films from the waterproof liquid in the nanometer-scale gas state and attaching each layer of waterproof films on the surface of each electronic products; 4, volatilizing the solvent, then enabling the nanometer-scale waterproof agent to be in contact with water molecules in air, naturally solidifying the nanometer-scale waterproof agent and ultimately forming the waterproof films.

The invention discloses a high-temperature-resistant high-load self-lubricating bearing surface structure and a manufacturing method thereof. The bearing surface structure is a laminated structure, is formed by overlapping a bottom layer, a middle layer and a surface layer from bottom to top, wherein the bottom layer is a 08F cold-rolled steel plate which is 1.5-2.5 millimeters in thickness; the middle layer is made of tin bronze powder, and is 0.15-0.28 millimeter in thickness; and the surface layer is a modified polytetrafluoroethylene material layer which is 0.02-0.05 millimeter in thickness. Through the method, pure polytetrafluoroethylene is turned into modified polytetrafluoroethylene, the bearing surface structure can meet the requirement of a dry friction condition, the working temperature can be up to 300 DEG C, the friction coefficient is 0.2, and the grinding width is less than 4 millimeters; compared with the pure polytetrafluoroethylene, the modified polytetrafluoroethylene has the advantages that the pressure resistance is improved by 5-10 times, the wear resistance is improved by 1,000 times, the linear expansion coefficient is lowered by 80 percent, and the heat conductivity is increased by 5 times; and the high-temperature-resistant high-load self-lubricating bearing surface structure can be widely applied to the field of bearings.