106results about How to "Favorable for large-scale production applications" patented technology

The invention provides a preparation method of a large-size graphene/graphite composite negative pole material, and relates to a preparation method of a composite negative pole material. The invention aims to solve the problems that the energy density and the power density are low, a discharging platform is high and first Kulun efficiency is low existing in an existing graphite negative pole material. The method comprises the following steps: (1) preparing large-size graphene oxide; (2) preparing a large-size graphene oxide and graphite compound; (3) annealing the compound so as to obtain the large-size graphene/graphite composite negative pole material. The lithium storing capacity of the large-size graphene/graphite composite negative pole material prepared by the preparation method disclosed by the invention is 372 mAh/g-401 mAh/g, the Kulun efficiency is 85%-90%, the capacity of the large-size graphene/graphite composite negative pole material achieves 162 mAh/g at the rate of 5C, which is 2 times higher than that of an ordinary business graphite, and after 2000 cycles, the reservation of the capacity is more than 95%. According to the invention, the preparation method of the large-size graphene/graphite composite negative pole material can be obtained.

The invention discloses a synthetic method of a benzopyran chiral compound. The method comprises the following steps: a compound with the structural formula I and a compound with the structural formula II carry out the condensation reaction to generate a compound with the structural formula III, and the compound with the structural formula III is oxidized to obtain the benzopyran chiral compound; the chemical additive adopts a benzoic acid or a substituted benzoic acid compound; and the chiral catalyst is a diphenyl prolinol ester compound or dinaphthyl prolinol ester compound. The synthetic method has the advantages that under the mild condition, relatively cheap raw materials are used, the benzopyran chiral compound derivate is synthesized with high yield, and the derivate is high in optical purity, accessible in raw material, and beneficial for large-scale production and application.

The invention relates to the chaotic laser field, and specifically relates to a semiconductor chaotic laser integrated with double feedback. The semiconductor chaotic laser integrated with double feedback solves the technical problems that a current chaotic laser generation apparatus is large in volume, is easy to be influenced by the environment, and is unstable in outputting. The semiconductor chaotic laser utilizes double feedback to improve the chaotic bandwidth of an integrated device to make the frequency spectrum to be more flat. For the semiconductor chaotic laser, a double-cavity structure eliminates the fixed time delay of a common single-cavity integrated laser chip; the double feedback cavity are similar in length but are different so that the time delay characteristic of the single-cavity integrated laser is thoroughly eliminated; the security for chaotic communication, the accuracy for chaotic laser ranging, and the randomness of the randomized number are improved; and the semiconductor chaotic laser can be applied to the communication field, the remote sensing field, the sensing field and the like. The semiconductor chaotic laser integrated with double feedback only uses a DFB laser chip, a high performance photoelectric detector and a plane lens fiber to realize chaotic output and detection, and can realize simultaneous output of a chaotic laser signal and a chaotic electric signal. The semiconductor chaotic laser integrated with double feedback also has the advantages of being small in the volume of the integrated structure and being low in cost.

The invention discloses an atomic layer etching device and an atomic layer etching method using the same. The atomic layer etching device comprises a reaction chamber, a separator assembly, a first plasma generating device and a second plasma generating device. The separator assembly divides the reaction chamber into an upper chamber and a lower chamber. The separator assembly comprises separators that can be grounded or connected to a DC bias power supply to stop charged particles in the upper chamber from entering the lower chamber and allow active and neutral particles to enter the lower chamber. The first plasma generating device is used for exciting gas entering the upper chamber into plasmas. The second plasma generating device is used for exciting gas entering the lower chamber into plasmas. By using active adsorption particle chemical adsorption instead of traditional reaction gas adsorption, the atomic layer etching device can significantly improve the etching rate, shorten the etching cycle length, save the amount of etching reaction gas, and reduce the process cost.

The invention provides an electronic equipment casing material and a preparation method thereof. The electronic equipment casing material is prepared from raw material components in parts by weight as follows: 30-70 parts of polyphenyl ether, 40-70 parts of high impact polystyrene, 10-15 parts of a flame retardant, 3-5 parts of an antioxidant, 1-3 parts of a lubricant and 1-2 parts of carbon block powder, wherein the flame retardant is selected from one or more of triphenyl phosphate, bisphenol-A bis(diphenyl phosphate), decabromodiphenyl ethane, antimony trioxide and tri(tribromophenyl) cyanurate. The raw material components are stirred and uniformly mixed, the mixture is placed in an extruder to extrusion, and an extruded product is cooled, diced and dried to prepare the casing material. During preparation of the casing material, the processing temperature is low, forming is easy, and the prepared casing material is light in mass, low in shrinkage and good in temperature resistance and flame retardance, and has a wide application range.

The invention discloses ultraviolet excited white light polyhydric lead-free perovskite fluorescent powder and a preparation method thereof. The fluorescent powder has a perovskite structure, and thechemical formula is shown as A2B<1>xB<2>1-xB<3>yB<4>1-yX<1>mX<2>nX<3>6-m-n, wherein x is larger than or equal to 0 and less than or equal to 1; y is larger than or equal to 0 and less than or equal to1; m is larger than 0 and less than or equal to 6; n is larger than 0 and less than or equal to 6; 6-m-n is larger than or equal to 0 and less than or equal to 6; moreover, A is Cs<+>; B<1>, B<2>, B<3> and B<4> are Na<+>, Ag<+>, In<3+> and Bi<3+> respectively; X<1>, X<2> and X<3> are F<->, Cl<-> and Br<-> respectively. Through the key composition of the polyhydric lead-free perovskite fluorescentpowder, the overall flow process setting of the corresponding preparation method, and improvements on parameter conditions adopted in each step, compared with the prior art, the preparation method has the advantages that the kinds of near ultraviolet excited single matrix fluorescent powder can be effectively increased, a continuous adjustable function for an excited spectrum and an absorption spectrum is realized, and the adjustment of the LED (Light-Emitting Diode) light-emitting color temperature is realized.

The invention relates to an application of Pedunsaponin A and Pedunsaponin C in preparation of molluscacide, in particular to an application of Pedunsaponin A and Pedunsaponin C in killing of Pomacea canaliculata or Oncomelania hupensis Gredler. The compounds are from plants, have low toxicity and are environment-friendly; the compounds have remarkable toxic activity on injurious snails, the killing rate is up to or higher than 90%, and the compounds have huge development potential in agricultural application; meanwhile, the plants as sources of the two compounds have strong vitality, are abundant in source and facilitate large-scale production and application.

The invention relates to an S-(carboxymethyl)-L-cysteine ammonium salt water crystalline pharmaceutical compound (having the following structural formula) and a preparation method and the application of the compound in the preparation of medicines for eliminating phlegm as well as medicines for preventing and treating respiratory system diseases such as chronic obstructive pulmonary diseases (COPD) and the like. After the compound is adopted, the COPD model rat airway resistance is remarkably reduced, the generation of oxide is reduced, the antioxidant level is increased, and the damage of oxide, inflammatory mediator and the like to the lung can be relieved.

The invention discloses a two-dimensional conductive mica-loaded carbon nitride photocatalytic material and a preparation method thereof. The two-dimensional conductive mica-loaded carbon nitride photocatalytic material is prepared by taking conductive tin dioxide-coated stripped flaky two-dimensional mica as a carrier and taking an amino compound as a raw material for synthesizing carbon nitride through a thermal polymerization method. A conductive layer formed by tin dioxide on the surface of flaky mica and carbon nitride form a bond, therefore, separation of photon-generated carriers of carbon nitride can be effectively promoted, and the photocatalytic property of carbon nitride can be improved; in addition, by taking the conductive mica flake as the carrier of carbon nitride, corrosion and embedding of an alkaline cement matrix on the photocatalytic material can be effectively prevented, and therefore the service life of carbon nitride can be prolonged. The method is easy to operate, low in cost, good in repeatability and suitable for large-scale industrialized production.

The invention discloses a non-contact voltage measuring device based on a multi-stage plate differential probe, which comprises the multi-stage plate differential probe, a signal processing module, an analog-to-digital conversion module, an MCU data processing module and an independent power supply module, when non-contact voltage measurement is carried out, the probe is similar to a clamp, a wire to be measured is clamped in the center of an insulating elastic material, and the probe is buckled with a shell, so that the probe wraps the wire to be measured, and a plurality of input signals are obtained through parasitic capacitance formed by the probe and a circuit to be measured; an amplification and filtering unit in the signal processing module processes an input signal and generates an output signal, and the data processing module combines a transfer function and a relationship of the corresponding output signal to construct a relational expression of an input voltage signal and an output voltage signal and solves the relational expression, thereby obtaining a voltage value of a to-be-detected line.

The invention discloses a method for preparing solar heat storage ceramic from ferrotitanium slag. The solar heat storage ceramic is prepared from the following raw materials and modifiers in percentage by mass: 70-80wt% of ferrotitanium slag, 5-10wt% of kaolin, 4-8wt% of talc, 4-8wt% of potassium feldspar, 1-4wt% of albite and 4-8wt% of fly ash. All the raw materials are subjected to raw materialtreatment, proportioning and mixing, granulation and aging, semi-dry pressing molding, drying and sintering to obtain the solar heat storage ceramic. The solar heat storage ceramic produced by the invention is low in cost and high in heat storage density, and the volume density is as high as 2.97-3.08 g.cm < -3 >; the utilization rate of the ferrotitanium slag is as high as 70-80%, the solid waste is greatly digested, the application field of the ferrotitanium slag is widened, and the product has great environmental protection significance and economic value.

The invention discloses a solid acid catalyst and a preparation method and application thereof in esterification transesterification. The preparation method of the solid acid catalyst comprises the following steps of carrying out a liquid phase deposition reaction on a graphene oxide suspension dissolved with an aluminum salt to obtain aluminum oxide modified graphene oxide, and carrying out a mixed reaction on the aluminum oxide modified graphene oxide and concentrated sulfuric acid to obtain the solid acid catalyst. The preparation method is simple to operate, the method has the advantages of simple operation, mild conditions, very good catalysis effect on esterification and transesterification of the kitchen waste oil, realization of the fatty acid methyl ester yield higher than 90%, easy separation of the solid acid catalyst from the product, cyclic utilization after simple treatment, no pollution, and substantial reduction of the production cost of biodiesel prepared from the kitchen waste oil.

The invention relates to an S-(carboxymethyl)-cysteine pharmaceutical compound and a preparation method and the usage of the compound; the structural formula of the compound is shown by (I); and the compound is especially applied to the preparation of medicines for eliminating phlegm as well as medicines for preventing and treating respiratory system diseases such as chronic obstructive pulmonary diseases (COPD) and the like. After the compound is adopted, the COPD model rat airway resistance is remarkably reduced, the generation of oxide is reduced, the antioxidant level is increased, and the damage of oxide, inflammatory mediator and the like to the lung can be relieved.

A process for preparing the xanthophyll powder as a food additive from xanthophylls resin includes such steps as heating and stirring while dripping the aqueous solution of low-class alcohol, saponification while adding anti-oxidizing agent, filtering to obtain xanthophylls crystals, washing with de-ionized water, vacuum drying and pulverizing. It has high stability.

The invention relates to a preparation method of potassium fluoride. The method comprises: adding fluorosilicic acid and potassium fluosilicate into a reaction kettle, after starting to stir, continuously adding potassium hydroxide solution, and regulating a pH (power of hydrogen) value of mixed solution in the reaction kettle into a first preset pH value; after completing the reaction, carrying out solid-liquid separation, adding a first supernatant obtained by solid-liquid separation into a refining kettle, then adding sulfuric acid solution into the refining kettle and carrying out stirring; after continuously adding barium hydroxide octahydrate into the refining kettle and carrying out stirring, transferring liquid obtained by solid-liquid separation into a transfer groove, adding potassium carbonate to carry out stirring, and after completing the reaction, transferring second supernatant into a concentration kettle; after regulating a pH value of mother solution of the potassium fluoride in the concentration kettle by utilizing hydrofluoric acid, carrying out spray-drying on the mother solution of the potassium fluoride to obtain anhydrous potassium fluoride. According to thepreparation method of the potassium fluoride, which is disclosed by the invention, raw material cost and machining cost can be reduced; the preparation method of the potassium fluoride is beneficial to large-scale production application.

The invention provides an amorphous iron oxyhydroxide-biochar composite material and a preparation method thereof, and relates to the technical field of amorphous materials. The preparation method comprises the following steps: carbonizing biomass containing silicon dioxide to obtain a biochar material; and mixing the biochar material with an iron salt aqueous solution, and carrying out a hydrothermal reaction under an alkaline condition to obtain the amorphous iron oxyhydroxide-biochar composite material. Biomass rich in silicon dioxide is used as a raw material to prepare the porous biochar material, on one hand, the biochar material can be used as a carrier of a composite material, and on the other hand, silicon dioxide in the biochar material also provides a necessary silicon source for inhibiting crystallization of iron oxyhydroxide, so that the structural disorder of iron oxyhydroxide is ensured; the amorphous iron oxyhydroxide-biochar composite material is obtained. The preparation method is simple in process, the whole process is carried out in a water phase, and large-scale production and application are facilitated.

The invention discloses a coupling structure of a multimode fiber and a photoelectric detector. The coupling structure comprises a reflection structure and a gather structure, the reflection structure is used for reflecting all output light beams of the fiber into an input terminal of the gather structure, the reflection structure can be a reflector or a fiber end face having a certain angle of the fiber, the reflection plane of the reflector and the fiber end face can be plated with a high-reflecting film, the gather structure is used for achieving transmission and gathering of light beams, the output terminal is connected with the photoelectric detector, the gather structure comprises a trumpet-shaped through hole structure with a relatively-large upper aperture and a relatively-small lower aperture, and the reflection plane of the gather structure can be plated with a high-reflecting film. By means of the reflection of the reflection structure and the trumpet-shaped through hole structure in the gather structure, reflection, transmission and focusing of light beams are achieved, the complex degree of the system is greatly reduced, the coupling structure is advantaged by being high in coupling efficiency, low in insertion loss and cost, simple and fast to assemble, small in size and the like, and the coupling structure is beneficial to large-scale production and application.

The invention relates to a silicon ingot and a preparation method thereof. The preparation method of the silicon ingot comprises the following steps: uniformly mixing dopants with coating materials and then coating the inner wall of a crucible of an ingot furnace with the mixture, thus forming a crucible coating; and after the crucible coating is solidified, adding silicon materials to the crucible of the ingot furnace and then carrying out melting, directional solidification and annealing on the silicon materials in sequence, thus obtaining the silicon ingot. In the preparation method of the silicon ingot, firstly the dopants are uniformly mixed with the coating materials and the inner wall of the crucible is coated with the mixture, and then at the silicon material melting stage, a small number of dopants enter the silicon liquid obtained after melting to be fused with the silicon liquid to undergo segregation; and the directional solidification process is the crystal growth stage and plenty of dopants on the inner wall of the crucible can diffuse in the silicon ingot, so that segregation of the dopants can be reduced and the resistivity of the silicon ingot can be effectively controlled, thus enabling the resistivity of the silicon ingot to be uniform in distribution, increasing the yield of the cast ingot and effectively reducing the cost. Besides, the invention also relates to the silicon ingot prepared by the preparation method.

The invention discloses a substrate for terahertz meta-material construction, a terahertz meta-material and a preparation method. The preparation method of the substrate for terahertz meta-material construction comprises the following steps: uniformly mixing a target ceramic substrate material with a binder and a polar solvent to prepare slurry; molding the slurry through a 3D printing technology,and then performing drying treatment to obtain a semi-finished ceramic chip product; and finally, sintering the semi-finished ceramic chip product. The preparation method is simple in process, shortin production period, high in forming efficiency, low in production cost and suitable for preparing small-size substrates; and the prepared substrates are suitable for constructing terahertz metamaterials, and large-scale production and application of the terahertz metamaterials are facilitated.