36results about How to "The preparation process cycle is short" patented technology

The invention provides a preparation method of an anti-oxidation and ablation-resistant C / C-ZrC carbon ceramic composite material. The preparation method comprises the processing steps of preparationof a carbon fiber preform, heat treatment of the carbon fiber preform, preparation of a fiber protective layer, preparation of a porous C / C composite material preform, high temperature heat treatment,preparation of infiltration alloy and preparation of C / C-ZrC carbon ceramic composite material by reaction infiltration and the like. Compared with the prior art, the preparation method of the anti-oxidation and ablation-resistant C / C-ZrC carbon ceramic composite material can introduce a high-temperature silicon-containing compound and a high-temperature tantalum-containing compound into a C / C-ZrC composite matrix through one-step alloy reaction infiltration, and the two compounds conduct synergistic interaction during an oxidative ablation process. Oxidation and ablation resistance of an existing C / C-ZrC carbon ceramic composite material is effectively improved. The preparation process of the invention has short cycle period and high efficiency, and the prepared C / C-ZrC carbon ceramic composite material is low in cost.

The invention discloses an internal-heated integrated evaporation boat with an aluminum oxide porous structure buffering layer. Surface coatings of the evaporation boat totally comprise two layers. The inner layer is the Al2O3 buffering layer of a loose porous structure, and the outer layer is the compact low-porosity corrosion-resistantAl2O3 coating. Firstly, through a rotary-coating steeping technique, the Al2O3 buffering layer with the thickness being 0.1-0.3 mm is prepared on the surface of a matrix; and then through a plasma spraying technology, the Al2O3 corrosion-resistantlayer with the thickness being 0.5-1 mm is sprayed and prepared on the evaporation boat with the buffering layer. According to the composite technique, the evaporation boat with the Al2O3 coatings of different microstructures is prepared; in service, the buffering layer of the porous structure can achieve the stress relieving effect and can further prevent the problem of matrix oxidization caused by later spraying; and the compact low-porosity Al2O3 coating brings excellent corrosion resistance into play and can be widely applied to the technical field of vacuum evaporation metal thin films.

The invention discloses a preparing method of high-conductive coke / ceramic composite material, which comprises the following steps: allocating raw material with 50-65% natural scale graphite, 25-32% middle-phase tar, 2.5-5% Si powder, 5-15% Ti powder; blending these materials evenly; placing mixed raw material into ball grinder; introducing distilled water and polyvinyl alcohol to ball 1-3h; drying in the vacuum; removing solvent; heating to 2600-2800 Deg C at 200-600Deg C / h; pressurizing to 20-40Mpa under maximum high temperature.

The invention relates to a medicine health-care usage of globefish I collagen extraction. The main chemical components and active components in the globefish I collagen extraction are: globefish natural unmodified I collagen or globefish modified I collagen and a part of hydrolysate thereof. The invention also relates to a preparing process, an immunology measuring method thereof and the application in the treatment and health care as the effective component.

The invention discloses a cationic dextran-based polymer preparation method, which comprises: adding potassium persulfate to a dextran solution under an oxygen-free condition, stirring for 15-20 min,adding METAC, carrying out a reaction for 2-4 h at a temperature of 65-75 DEG C, adding ethanol to obtain a precipitate, purifying, washing, and drying to obtain white dry solid particles, ie., the cationic dextran-based polymer, wherein a sucrose solution is subjected to an enzyme-catalyzed fermentation reaction with dextran sucrose to obtain the dextran solution. Compared with the commercially available organic flocculant, the flocculating agent of the invention is safe, non-toxic and pollution-free, does not contain environmentally harmful components, and achieves the industrial productionand application of environmentally-friendly bioflocculants; and based on the basic skeleton structure of the biopolymer, the grafted derivative can be regenerated, and has good biodegradability and good biocompatibility so as to meet the ecological concept of sustainable development.

The invention discloses a preparing method for a U-Mo-Zr alloy. The preparing method comprises the following steps of graphite crucible primary alloying, graphite sieve plate ingot leaking and ceramiccrucible secondary alloying. A primary ingot of a binary alloy is prepared through graphite crucible primary alloying firstly, then, a binary alloy ingot with few inclusions is obtained through ingotleaking in a graphite sieve plate, then, a tertiary alloy is prepared through ceramic crucible secondary alloying, and finally, the needed U-Mo-Zr alloy is obtained. In the preparing method, the graphite sieve plate is additionally arranged for conducting primary alloying, ceramic crucible secondary alloying and other optimization technology lines, technology parameters are reasonably controlled,and dissolving and diffusing of alloy elements are more sufficient. Meanwhile, the inclusions are further controlled through ingot leaking, ceramic crucible smelting is adopted for secondary alloying, the alloy purity is greatly improved, and the alloy uniformity is improved. In addition, the high-quality U-Mo-Zr alloy can be obtained by adopting three procedures, and the period of the preparingtechnology is short.

The invention relates to a method for preparing a medical active carbon tube by utilizing hairs. The method comprises the following steps of: firstly cutting the hairs into small sections, then soaking the small sections of hairs into activating agent solution, then carrying out microwave activation, and finally carrying out high-temperature carbonization. The method has the beneficial effects that 1, the preparation process is simple, energy-saving and environment-friendly; 2, the prepared medical active carbon is stable, and the thickness of the tube wall is even, and the prepared medical active carbon is excellent medical active carbon; 3, the preparation process is short in period, and low in energy consumption, and the product yield is high; and 4, a new path for raw materials of the medical active carbon tube is opened up, and the method has important application prospect.

The invention relates to a method for preparing a high thermal conductivity graphite material. The method takes the 80-90 of natural scale graphite percentage by weight and the 10-20 of coal pitch percentage by weight as the raw materials, after the temperature of the natural scale graphite is raised to 120-150 DEG C and the coal pitch is fused into liquid, the natural scale graphite is added in for kneading for 0.5-2 h, after the kneading is finished, the mixed raw material is put in a die with temperature of 120-150 DEG C and then is molded by pressing under the pressure of 200-600 kg / cm<2>and the dwelling is carried out for 5-15 min, the demoulding is carried out after the die temperature is reduced to 60-90 DEG C, then the molded product is put in a graphitizing furnace for heating to 2300-2800 DEG C and constant temperature for 0.5-1 h at the highest temperature, and then the molded product is discharged from the furnace after being naturally cooled to 50-100 DEG C to obtain high thermal conductivity graphite material. The invention has the advantages of short period of the preparation process, low manufacturing cost and good thermal conductivity of the graphite material.

The invention provides a sacrificial layer of a micromechanical structure and a manufacture method of the micromechanical structure. Low-melting-point alloy is used for manufacturing the sacrificial layer of the micromechanical structure and refers to an alloy material with melting point of the alloy of below 300 DEG C; the sacrificial layer of the micromechanical structure can reach hundreds of micrometers, can be rapidly and effectively removed and can be compatible with organic matters; and the manufacture method of the micromechanical structure based on the sacrificial layer process can be operated simply, and the process period is 1 / 4 of that of the conventional thin film deposition method.

The invention discloses a wave-transparent silicon nitride radome material and a preparation method thereof. The wave-transparent Si3N4 radome material uses low-density porous silicon nitride as a core layer, uses silicon nitride or boron nitride chopped fibers or crystal whiskers as a core layer reinforcement phase, and uses condense silicon nitride as a surface coating layer. Firstly, after being mixed with the silicon nitride or boron nitride chopped fibers for pelletizing, silicon powder is evenly mixed with pore forming agent by a certain ratio, and is molded to a blank with a certain shape; the pore forming agent is totally decomposed at the temperature of 200-300 DEG C to obtain a porous blank. Then, the nitriding treatment is implemented to obtain a chopped fiber-reinforced porous silicon nitride ceramic body; the drying is implemented after the ultrasonic cleaning. Finally, the chemical vapor deposition (CVD) is implemented for the porous silicon nitride ceramic body to prepare a condense silicon nitride coating layer. The wave-transparent silicon nitride radome material and the preparation method thereof have the following advantages: (1) the chopped fibers or crystal whiskers are inlaid in the porous silicon nitride core layer to act the reinforcement effect; (2) the condense silicon nitride is on the outer layer of the porous silicon nitride core layer to act the water and steam permeation preventing effect; (3) the preparation process has short period and low cost.

The invention discloses a 3D slipper printing method and slippers. The 3D slipper printing method comprises the steps that shoe sole layers are tailored for use; foot pressure data is acquired to form3D printing drawings, the 3D printing drawings are transmitted to a 3D printer; the surfaces of the shoe sole layers are fused through high temperature of the 3D printer and are bonded with the bottom surfaces of upper-layer frames of shoe soles through melt blending in an adhesive-free mode, hollow-out upper-layer frame structures are printed on the shoe sole layers through the 3D printer layerby layer, and shoe sole making is completed; the made shoe soles are punched, shoe uppers are inserted, and slipper making is completed. Slipper soles are made by adopting a 3D printing technology, amaking process period of the method is short, the cost is low, the operation is simple, the soles of slippers are of the hollow-out upper-layer frame structures, the upper-layer frame structures and the shoe sole layers are combined together in the material bonding mode of melt blending, raw materials are saved, the firmness and air permeability of the shoe sole layers are improved, and bacteria are not likely to breed.

The invention discloses an internal heating type integrated evaporation basket with an aluminum oxide vesicular structure buffer layer. Two layers of coatings are totally arranged on the surface of the evaporation basket, the inner layer is a Al2O3 buffer layer of a loose vesicular structure, the outer layer is a compact and low-porosity corrosion resistance Al2O3 coating, and a spinning impregnation technology is adopted for preparing a Al2O3 buffer layer with the thickness ranging from 0.15 mm to 0.5 mm on the surface of a base; and then a plasma spraying technology is adopted for preparing a Al2O3 corrosion resistance layer with the thickness ranging from 0.5 mm to 1 mm on the evaporation basket on the buffer layer in a spraying manner. According to the internal heating type integrated evaporation basket, a composite process is adopted for preparing the Al2O3 coating evaporation basket of different microstructures, the buffer layer of the vesicular structure can achieve the stress releasing effect on service, and the problem of base oxidation caused by follow-up spraying can be prevented; and the compact and low-porosity Al2O3 coating layer has the excellent corrosion resistance, and the internal heating type integrated evaporation basket can be permanently and widely applied to the technical field of metal thin film vacuum evaporation.

The invention discloses a preparing method for a U-Mo-Zr alloy. The preparing method comprises the following steps of graphite crucible primary alloying, graphite sieve plate ingot leaking and ceramiccrucible secondary alloying. A primary ingot of a binary alloy is prepared through graphite crucible primary alloying firstly, then, a binary alloy ingot with few inclusions is obtained through ingotleaking in a graphite sieve plate, then, a tertiary alloy is prepared through ceramic crucible secondary alloying, and finally, the needed U-Mo-Zr alloy is obtained. In the preparing method, the graphite sieve plate is additionally arranged for conducting primary alloying, ceramic crucible secondary alloying and other optimization technology lines, technology parameters are reasonably controlled,and dissolving and diffusing of alloy elements are more sufficient. Meanwhile, the inclusions are further controlled through ingot leaking, ceramic crucible smelting is adopted for secondary alloying, the alloy purity is greatly improved, and the alloy uniformity is improved. In addition, the high-quality U-Mo-Zr alloy can be obtained by adopting three procedures, and the period of the preparingtechnology is short.

The invention relates to the technical field of chemical synthesis, in particular to a method for preparing manganese telluride molybdate by self-propagating combustion of citrate gel. The method comprises the following steps of: (1) dissolving citric acid in ammonia water to form a solution A; (2) dissolving raw materials of a Mn source, a Te source and a Mo source in nitric acid according to a stoichiometric ratio to form a solution B; (3) under the condition of magnetic stirring, mixing the solution A and the solution B to form gray milk; (4) dissolving the milk with ammonia water until themilk is clear, and adjusting the pH value of the solution to 7.5-8.5; (5) uniformly stirring the solution to obtain a Mn-Te-Mo sol; (6) drying the prepared Mn-Te-Mo sol to obtain a Mn-Te-Mo gel; and(7) heating the Mn-Te-Mo gel to realize self-burning of the gel after a few minutes to form loose manganese telluride molybdate powder. The method provided by the invention has the advantages of simple preparation process, continuous production, low price and low cost of equipment used for preparation, and short preparation process period.

The invention discloses a preparing method of high-conductive coke / ceramic composite material, which comprises the following steps: allocating raw material with 50-65% natural scale graphite, 25-32% middle-phase tar, 2.5-5% Si powder, 5-15% Ti powder; blending these materials evenly; placing mixed raw material into ball grinder; introducing distilled water and polyvinyl alcohol to ball 1-3h; drying in the vacuum; removing solvent; heating to 2600-2800 Deg C at 200-600Deg C / h; pressurizing to 20-40Mpa under maximum high temperature.

The invention discloses a process for producing ferro-molybdenum through an electrothermal method. The process includes the following steps that A, molybdenite is roasted to obtain molybdenum oxide minerals; B, the molybdenum oxide minerals are smashed, ferric oxide powder and carbon powder are added into the smashed molybdenum oxide minerals for uniform mixing; C, a binder is added into mixed powder and then briquetting is performed; and D, a briquetted blank is put in a high-temperature electrothermal furnace to be smelted, and then the ferro-molybdenum can be obtained. By means of the process for producing the ferro-molybdenum through the electrothermal method, the molybdenite is roasted, powdered and uniformly mixed together with the ferric oxide powder and the carbon powder to obtain the mixture, the mixture is briquetted, smelting is performed through the high-temperature electrothermal furnace so as to obtain the ferro-molybdenum, equipment is simple, the period of the preparation process is short, the operation difficulty is low, the environment is protected, pollution is avoided, and the production and manufacturing cost is low.

The invention discloses an internal heating type integrated evaporation basket with an aluminum oxide vesicular structure buffer layer. Two layers of coatings are totally arranged on the surface of the evaporation basket, the inner layer is a Al2O3 buffer layer of a loose vesicular structure, the outer layer is a compact and low-porosity corrosion resistance Al2O3 coating, and a spinning impregnation technology is adopted for preparing a Al2O3 buffer layer with the thickness ranging from 0.15 mm to 0.5 mm on the surface of a base; and then a plasma spraying technology is adopted for preparing a Al2O3 corrosion resistance layer with the thickness ranging from 0.5 mm to 1 mm on the evaporation basket on the buffer layer in a spraying manner. According to the internal heating type integrated evaporation basket, a composite process is adopted for preparing the Al2O3 coating evaporation basket of different microstructures, the buffer layer of the vesicular structure can achieve the stress releasing effect on service, and the problem of base oxidation caused by follow-up spraying can be prevented; and the compact and low-porosity Al2O3 coating layer has the excellent corrosion resistance, and the internal heating type integrated evaporation basket can be permanently and widely applied to the technical field of metal thin film vacuum evaporation.

The invention discloses an internal-heated integrated evaporation boat with an aluminum oxide porous structure buffering layer. Surface coatings of the evaporation boat totally comprise two layers. The inner layer is the Al2O3 buffering layer of a loose porous structure, and the outer layer is the compact low-porosity corrosion-resistantAl2O3 coating. Firstly, through a rotary-coating steeping technique, the Al2O3 buffering layer with the thickness being 0.1-0.3 mm is prepared on the surface of a matrix; and then through a plasma spraying technology, the Al2O3 corrosion-resistantlayer with the thickness being 0.5-1 mm is sprayed and prepared on the evaporation boat with the buffering layer. According to the composite technique, the evaporation boat with the Al2O3 coatings of different microstructures is prepared; in service, the buffering layer of the porous structure can achieve the stress relieving effect and can further prevent the problem of matrix oxidization caused by later spraying; and the compact low-porosity Al2O3 coating brings excellent corrosion resistance into play and can be widely applied to the technical field of vacuum evaporation metal thin films.

The invention provides a preparation method of a flaky nanometer zinc oxide powder, which adopts the following preparation steps: (1) preparing a water-soluble zinc salt solution; (2) under mixing in the room temperature, dripping ammonia water or ammonium salt in the solution till the pH=11, then adding PEG with 0.1-0.6% weight of solute, and finally transferring the prepared solution into a reaction vessel; (3) conducting hydro-thermal treatment of the material in the reaction vessel under the closed condition with the treatment temperature of 160-240 DEG C and the time of 3-24 hours; and (4) cleaning and drying the product with the deionized water so as to obtain the white flaky nanometer zinc oxide powder. The single dispersed nanometer zinc oxide powder can be directly obtained without roasting and grinding for the synthesis of powders, thereby simplifying the production process for industrialized production, reducing the equipment investment, lowering the production cost and being beneficial to mass production.