37results about How to "Control component" patented technology

The invention provides an inclusion control method of an Si-Mn-killed non-oriented silicon steel, and belongs to the technical field of steel smelting. The non-oriented silicon steel comprises the following chemical components: not greater than 0.005% of C, 0.4-1.0% of Si, 0.20-0.80% of Mn, not greater than 0.04% of P, not greater than 0.005% of S, not greater than 0.005% of Als, and the balance Fe and inevitable impurities. The method comprises the processes of smelting through a converter, refining under RH and vacuum, and continuously casting; the slag amount of the steel from the converteris strictly controlled; lime, synthetic slag and calcium carbide are added to adjust the slag; the refining under HR and vacuum is that a deep decarbonization mode is carried out; after decarbonization, metallic aluminum is added to realize preliminary dexidation, and SiC is added to the ladle slag surface at the same time in order to deoxidize and modify the slag; the operation is circulated for1-3min; then low-carbon low-titanium ferrosilicon is added to realize Low carbon, low titanium ferrosilicon; the operation is circulated for 3-6min, then manganese metal, ferrophosphorus and the likeare added to alloy, and the net circulating time is beyond 8min after alloying. With the adoption of the method, the composition of nonmetal inclusions in the steel can be improved, so that the performances of the non-oriented silicon steel can be improved, and the foundation is supplied to develop high-performance non-oriented silicon steels.

The invention discloses a layer-by-layer alternatively doped low-leakage-current BiFeO3 film and a preparation method thereof. The preparation method comprises the steps of dissolving bismuth nitrate, ferric nitrate and nitric acid into mixed liquid of ethylene glycol monomethyl ether and acetic anhydride so as to obtain a precursor solution A; dissolving bismuth nitrate, ferric nitrate and samarium nitrate in mixed liquid of ethylene glycol monomethyl ether and acetic anhydride so as to obtain a precursor solution B; coating the precursor solution A on a FTO/glass substrate by way of spin coating, baking and annealing the FTO/glass substrate so as to obtain a Tb doped crystalline BiFeO3 film, coating the precursor solution B on the Tb doped crystalline BiFeO3 film by way of spin coating, baking and annealing the Tb doped crystalline BiFeO3 film so as to obtain a Sm doped crystalline BiFeO3 film, and alternatively preparing the Tb doped crystalline BiFeO3 film and the Sm doped crystalline BiFeO3 film on the Sm doped crystalline BiFeO3 film so as to obtain the layer-by-layer alternatively doped low-leakage-current BiFeO3 film. The method disclosed by the invention adopts a sol-gel process, and is simple in equipment requirements and suitable for preparing films on large surfaces and irregularly-shaped surfaces, and chemical components are precise and controllable.

The invention relates to a composite material used for embedding ferrite nanoparticles into antiferromagnetic oxide base and a preparation method thereof. The preparation method comprises the following steps: (1) mixing solution of metal ions is prepared; (2) ammonium hydrogencarbonate aqueous solution is added into the mixing solution of the metal ions so as to form sediment; (3) the obtained sediment is filtered, washed and dried until dry powder is obtained; (4) the obtained powder is sintered in the air at high temperature, thus forming the composite material used for embedding the ferrite nanoparticles into the antiferromagnetic oxide base. The composite material used for embedding the ferrite nanoparticles into the antiferromagnetic oxide base prepared by the method has magnetic exchange bias effect.

The invention belongs to the field of tissue engineering, and discloses a preparation method of a nano-fiber scaffold for promoting cartilage regeneration to solve the problem that Nell-1 serving as anovel cartilage-derived growth factor can promote cartilage bone cell functions, but is easily inactivated in the process of being integrated into a tissue engineering cartilage scaffold. The preparation method includes the steps: firstly, preparing Nell-1 supported chitosan nano-particle solution and collagen/poly (L-lactic acid)-copolymer (epsilon-caprolactone) mixed solution; secondly, preparing a PLLA-CL/collagen nano-fiber mesh by coaxial electro-spinning and dynamic liquid collection technology; finally, preparing the collagen/HA mixed nano-fiber scaffold by collagen and hyaluronic acid(HA). The operation method is simple, the prepared nano-fiber scaffold is good in biological compatibility, biological activity of the growth factor can be protected, the release time of the growth factor is prolonged, and cartilage repair and regeneration can be promoted.

The invention discloses a stirring cup, and belongs to food processing machinery. The stirring cup comprises a cup body, a cup lid, a rod body, a stirring body, an outer scraping ring and an outlet, wherein a flange hole is formed in the cup lid, and the cup lid covers the rim of the cup body; the rod body penetrates through the flange hole, and the stirring body is fixed at one end of the rod body and is arranged in the cup body; the outer scraping ring is arranged on outer wall of the stirring body in a sleeving manner and is attached to the inner wall of the cup body; and the outlet is formed in the side wall of the cup body, is close to the cup bottom, and is communicated with the inner cavity of the cup body. According to the stirring cup, the stirring body is driven by downward movement of the rod body and is used for extruding toward the cup bottom, and a stirred food is extruded to pass through the outlet in the cup bottom and delivered into a target container along with constant extrusion, so that the food in the stirring cup can be taken out easily, the food output speed and quantity can be conveniently controlled, the food taking process can be further clean, and food waste can be reduced.

The invention relates to a preparation method of beta-type bismuth oxide. The preparation method comprises the following steps of S1, preparing a bismuth nitrate solution; S2, adding polyacrylamide tothe bismuth nitrate solution in the step S1 and stirring evenly; S3, disposing an alkaline solution with a concentration of 2-4 mol/L, adding alcohol ether phosphate ester, stirring and mixing, mixing the alkaline solution and the solution obtained in the step S2 in an equal volume ratio, stirring evenly, and adjusting the pH to 8-13 to obtain a bismuth oxide precursor refluxing liquid; S4, performing boiling reflux on the bismuth oxide precursor refluxing liquid with an oil bath, performing water condensation reflux to obtain the product; S5, washing, drying and grinding the product to obtain beta-type bismuth oxide powders. The preparation method adopts a boiling reflux method to prepare bismuth oxide with a single crystal form, greatly reduces the synthesis temperature of the powders,achieves standardized production, can effectively control the size, composition and morphology of crystal grains, and obtains high-purity beta-type bismuth oxide.

The invention discloses a special compound fertilizer for relieving citrus etiolation and a preparation method thereof. The special compound fertilizer for relieving citrus etiolation is prepared from, by weight, 40-70 parts of organic fertilizer, 20-35 parts of plant ash, 10-25 parts of inorganic fertilizer, 0.1-0.5 part of rooting agent, 3-5 parts of humate and 2-5 parts of bacterial manure; the bacterial manure comprises bacillus mucilaginosus, trichoderma harzianum and saccharomycetes; the compound fertilizer can provide various nutrient elements required by the growth of citrus and can also improve the soil environment, reproduction of harmful bacteria is inhibited, the growth of beneficial bacteria is promoted, the compound fertilizer helps diseased or infected plants to absorb the nutrient elements, then citrus etiolation diseases are relived, and the recovery of the citrus diseased or infected plants is promoted.

The invention discloses a health drug used for external-use moxibustion. The health drug is characterized in that adopted moxibustion materials comprise homogeneous moxa and extract of various natural drugs or drug powder. The health drug has the beneficial effects that after being picked, raw material mugwort leaves for manufacturing the moxa are subjected to homogeneous classified picking and winnowing before being dried in the sun, so that the quality of every kind of mugwort leaves, tenderness and length of tomentum as well as content of beneficial substances contained in the tomentum tend to be the same, and thus, the characteristics of the moxa prepared by drying and ageing tend to be the same, and the homogeneous moxa is obtained; a moxibustion material prepared by the homogeneous moxa can be uniformly combusted and is the same in combustion speed, so that the moxibustion component, force, speed and time can be controlled very well, and the moxibustion effect is improved; besides, other natural drug extract or drug powder is added on the moxa, so that the moxibustion material has more curative effects, and thus, a purpose of treating various diseases or achieving health care is achieved.

The invention discloses a multihole PdRu alloy catalyst for electrochemically synthesizing ammonia and a preparation method thereof. The preparation method comprises the following steps: dissolving potassium chloride and ruthenium chloride in deionized water, and controlling the concentrations of the potassium chloride and the ruthenium chloride between 10 mM and 40 mM; then dissolving sodium borohydride in deionized water, and controlling the concentration between 5 mM and 50 mM; in a stirring state, quickly adding a freshly synthesized sodium borohydride solution into a precious metal precursor solution for reaction, and washing, centrifugating and drying the product after 1 to 5 minutes, thus obtaining the structure and component-controllable PdRu alloy catalyst. The preparation processis simple, and the reaction time is extremely short; at normal temperature and normal pressure, the prepared material is excellent in electrochemically synthesizing ammonia performance.

The invention discloses a BiFe1-XMnXO3 ferroelectric film with high remnant polarization and a preparation method thereof, and x is equal to 0.02-0.08. The BiFe1-XMnXO3 ferroelectric film is of a twisty perovskite structure, belongs to a rhombohedral system, and is good in uniformity. At the frequency of 1kHz, the remnant polarization is 100-130.4mu C/cm<2>. The preparation method comprises the steps of: dissolving bismuth nitrate, ferric nitrate and manganese acetate in a mixed solution of ethylene glycol monomethyl ether and acetic anhydride according to a molar ratio of 1.05:(1-x) to obtain a precursor solution; and spinning the precursor solution on a substrate, homogenating and baking to obtain a dry film; annealing to obtain the BiFe1-XMnXO3 ferroelectric film, repeatedly carrying out the steps of spinning the precursor solution, baking, and annealing till a required film thickness is reached, thus obtainng the BiFe1-XMnXO3 ferroelectric film with high remnant polarization. The BiFe1-XMnXO3 ferroelectric film is simple in requirement of equipment, easily controllable in doping amount, and capable of greatly improving ferroelectric properties and dielectric properties of a BiFeO3 film.

The invention discloses a camellia seed screening device for oil-tea camellia processing. The camellia seed screening device comprises a box body, four sets of supporting legs, a storage box, a firstfilter screen, a second filter screen and a cleaning device, wherein the four sets of supporting legs are fixedly welded to the four corners of the bottom of the box body, the storage box is disposedon the left side of the top of the box body, a first discharge hole is formed in the position, close to the top, of the right side wall of the box body, and a second discharge hole is formed in the middle section of the left side wall of the box body. The first filter screen and the second filter screen are fixedly arranged in the box body from top to bottom, an inclined table is placed at the bottom of the box body, the lowest end of the first filter screen communicates with the feeding end of the first discharge hole, the lowest end of the second filter screen communicates with the feeding end of the second discharge hole, and the lowest end of the inclined table communicates with the lowest end of a third discharge hole. The camellia seed screening device for oil-tea camellia processingis reasonable in design and can effectively screen camellia seeds, can effectively control the screening amount of the camellia seeds, can effectively clean the filter screens, and is suitable for popularization and use.

The invention discloses a damage-free waste drilling fluid processing process, which comprises the following steps of: firstly drilling a wellhead by a drilling machine, and injecting wellhead slurry; passing a mixture of waste drilling fluid and the wellhead slurry through a vibration sieve to be filtered for obtaining rock debris, and meanwhile, feeding filter liquid into a desander; putting the obtained rock debris into a cleaner a, performing cleaning through externally injected clean water to obtain clean rock debris and medium-coarse sand, and meanwhile, merging the clean water a into circulation water; passing the filter liquid through the desander to obtain medium-fine sand; putting the obtained medium-fine sand into a cleaner b; using introduced clean water for cleaning to obtain clean sand; merging cleaning water b into the circulation water; and meanwhile, feeding the filter liquid obtained after passing through the desander into a desilter. The damage-free waste drilling fluid processing process has the advantages that through the principle, on the premise of not easily causing rock framework collapse due to clay mineral swelling and transportation, various different solid-phase particles in the waste drilling fluid can be processed; the circulation flowing use of the waste drilling fluid is ensured; and the condition that the fluid cannot reach a borehole from a flow storage layer is avoided.

The invention belongs to the technical field of biological fermentation, and in particular relates to a polymyxin B sulfate production strain, a preparation method and application of polymyxin B sulfate. The present invention obtains a polymyxin B sulfate production strain through mutagenesis breeding, and optimizes the carbon source and nitrogen source of the fermentation medium, precisely regulates the fermentation conditions such as the inoculum amount, fermentation temperature, fermentation time, and tank pressure, and controls the The metabolite components finally utilize the bacterial strain obtained by mutagenesis of the present invention to produce polymyxin B sulfate in a tank unit of 2.0 g/L, exceeding the industry average level by 20%. The proportions of several impurity peaks specified by the USP/EP Pharmacopoeia in the fermented liquid in tanks are far lower than the levels recorded in domestic literature. Separation and purification of the fermentation broth to obtain high-purity and high-content polymyxin B sulfate, the biometric titer of the finished product is greater than 8100u/mg, the purity and content are both greater than 90%, the single impurities and components are all qualified, and the total impurities are less than 8 %, product quality is much higher than USP/EP standard.

The invention discloses a method for growing a (KxNa1-x)1-yLiyNbO3-based lead-free piezoelectric monocrystal. The method comprises the following steps: weighing raw material powder; weighing a fluxing agent and mixing with the raw material powder; putting the starting material into a crucible and putting the crucible into a furnace; carrying out heat preservation on the crucible at a temperature of 400 DEG C to 900 DEG C for 2 to 20 hours, then heating to 700 DEG C to 1000 DEG C, carrying out heat preservation for 2 to 20 hours until the starting material is completely molten and cooling the interior of the furnace to a room temperature at the speed of 1 to 200 DEG C/h so as to obtain the (KxNa1-x)1-yLiyNbO3-based lead-free piezoelectric monocrystal. The (KxNa1-x)1-yLiyNbO3-based lead-free piezoelectric monocrystal grown by virtue of a low-temperature preparation technology is of a pure perovskite structure and cannot generate impure phases. The method has the advantages that 1, the crystal grows at a low temperature and has a short growth period; 2, the requirement on a growing instrument is low during a low-temperature growing process; 3, the raw material powder contained in the crucible can be conveniently sealed and is nearly not volatilized due to a low growing temperature, so that the components of the growing crystal can be well controlled so as to prevent the deviation of the components.

The invention discloses a preparation method for copper-iron-zinc-tin-sulfur micron monocrystal particles. Elementary substance copper powder, elementary substance zinc powder, elementary substance tin powder, metal sulfide powder, elementary substance sulfur powder, a fluxing agent and the like are combined to form the reaction raw material; the reaction raw material is grinded and mixed based on a determined formula; the mixed powder is vacuum packaged in a quartz reaction container at a temperature of 600-1,000 DEG C for 48-120h; the quartz reaction container is cooled rapidly to the room temperature; and then the sample is taken out, washed and dried to obtain the copper-iron-zinc-tin-sulfur micron monocrystal particles. The dimensions of the prepared monocrystal particles can be regulated and controlled according to recrystallization temperature and time; the components of the particles can be effectively blended within a certain range based on the molar ratio of elements in the precursor; and in addition, the obtained monocrystal particles are uniform in particles, controllable in dimensions, and better in performance than that of the monocrystal particles prepared by the conventional method.

The invention discloses a B-site Mn and Ni co-doped high-remanent-polarization BiFeO3 film and a preparation method thereof. The preparation method comprises the following steps: dissolving bismuth nitrate, ferric nitrate, manganese acetate and nickel acetate according to a molar ratio of 1.05:[(0.92-0.98)-x]:(0.02-0.08):x in a mixed solution of ethylene glycol monomethyl ether and acetic anhydride, uniformly stirring to obtain a BiFeO3 precursor solution, wherein the total metal ion concentration in the BiFeO3 precursor solution is 0.1-0.5mol/L, and x is equal to 0.01 to 0.03; spin coating the BiFeO3 precursor solution on a FTO/glass substrate to prepare a wet film, baking the wet film to obtain a dried film, annealing at the temperature of 550 DEG C for 8-13 minutes, thus obtaining a crystalline state BiFeO3 film; repeatedly operating until the BiFeO3 film reaches the needed thickness after the crystalline state BiFeO3 film is cooled, thus obtaining the B-site Mn and Ni co-doped high-remanent polarization BiFeO3 film. According to the method, a sol-gel process is adopted, the equipment requirement is simple, the method is suitable for preparing films on large surfaces and out-of-shape surfaces, the chemical constituents are accurately controlled, and the crystal structure is regulated through co-doping, so that the ferroelectric properties of the film are greatly improved.

The invention relates to packaging equipment, in particular to quantity-controllable dry packaging equipment for mandarin orange coarse grain powder. The technical problem to be solved by the invention is to provide the quantity-controllable dry packaging equipment for mandarin orange coarse grain powder, which is simple, convenient and efficient. The quantity-controllable dry packaging equipment for the mandarin orange coarse grain powder comprises a rack, a supporting frame, a material storage box, a driving assembly, an opening assembly and a blocking assembly. The supporting frame is mounted on the rack. The material storage box is mounted on the rack. The driving assembly is mounted between the rack and the supporting frame. The opening assembly is mounted on the supporting frame. And the blocking assembly is mounted on the rack. The equipment is provided with a pushing assembly, so that workers do not need to manually control a connecting rod for discharging, and the burdens of the workers are reduced; and meanwhile, the falling amount of dried mandarin orange coarse grain powder can be controlled by controlling a first lead screw. The equipment is provided with a downward pressing assembly, so that the workers do not need to manually control a pushing plate to reset a blocking plate, and then the operation trouble of the worker is saved again.