31results about How to "Achieve crystallization" patented technology

Belonging to the technical field of preparation and application of electronic ceramics, the invention relates to a preparation method of a perovskite-like varistor ceramic material CaCu3Ti4O12 (CCTO) with a high dielectric constant. With nitrates of Cu and Ca as well as Ti (OC4H9)4 as starting materials, the method of the invention combines a hydrothermal method for preparing nanometer CCTO powder so as to prepare high performance CCTO varistor ceramics, thus realizing the purposes of lowering temperature, and improving varistor as well as dielectric properties.

The invention discloses an evaporating system capable of conducting online descaling and working continuously and an evaporating process. The evaporating system comprises n evaporating units, each evaporating unit is composed of an evaporator E and a steam-water separation mechanism S, the n evaporating units are connected in a feed liquor series-connection or parallel-connection evaporation mode to form the complete evaporating system, secondary steam generated by the n evaporating units shares one steam compression machine for pressurization and temperature raising, and a high-temperature steam main pipe is connected out of the steam compression machine and connected to high-temperature steam inlet pipes on the evaporating units in parallel; a liquid inlet pipe of the second-level/set evaporating unit is simultaneously connected with the first-level/set concentrate outlet pipe and a stoste inlet pipe; a concentrate main pipe is arranged, all the evaporating units except the first level/set evaporating unit are connected with the concentrate main pipe, the concentrate main pipe segment between the liquid inlet pipe and the concentrate output pipe of each evaporating unit is provided with a concentrate valve, valves on related inlet pipes and outlet pipes are controlled to isolate the evaporating units to be cleaned, and evaporating work of the system is not affected.

The present invention provides a method for realizing Si-Si bonding through adoption of an amorphous germanium film, and relates to a Si wafer bonding method. The method comprises: selecting Si substrate materials with crystal direction as (100), performing cleaning; boiling the substrate materials through adoption of a mixed solution of H2SO4 and H2O2, and immersing the substrate materials in a mixed solution of HF and H2O2; boiling the processed Si wafer in a mixed solution of NH4OH, H2O2 and H2O, and immersing Si wafer in a mixed solution of HF and H2O2; boiling the processed Si wafer in a mixed solution of HCL, H2O2 and H2O, and immersing the Si wafer in a mixed solution of HF and H2O2; drying the processed Si wafer to put the Si wafer into a direct current magnetron sputtering system, filling Ar gas into a sputtering chamber when the base pressure of the sputtering chamber is smaller than 1*10<-4>Pa; sputtering a-Ge thin film through regulation of direct current sputtering current and sample holder rotation speed; and realizing high-intensity Si-Si bonding through adoption of a hydrophilic a-Ge layer.

The invention provides a glass ceramic with transmittance close to that of a glass precursor. The glass ceramic comprises the following components in percentage by mole: 60 to 75 mol% of SiO2, 2 to 10mol% of Al2O3, 0 to 5 mol% of P2O5, 0.5 to 3 mol% of ZrO2, 0.5 to 6 mol% of Na2O, 15 to 28 mol% of Li2O, at least one of 0 to 5 mol% of B2O3, 0 to 5 mol% of MgO, and 0 to 5 mol% of ZnO, and at leastone of 0 to 2 mol% of HfO2, 0 to 2 mol% of Ta2O5, and 0 to 2 mol% of Y2O3, wherein the sum of the amounts of HfO2, Ta2O5 and Y2O3 is more than 0 and less than or equal to 2 mol%, and the difference between the visible light transmittance of the glass ceramic and the transmittance of the glass precursor for preparing the glass ceramic is 0.3-5%. According to the invention, the regulation and control difficulty of the visible light transmittance of the glass ceramic is reduced, so that the difference between the visible light transmittance of the glass ceramic and the visible light transmittanceof the glass precursor is only 0.3-5%.

The invention provides a heterotopic multi-metal oxide film epitaxial growth and continuous preparation method. According to the characteristics of a metal target, the initial component evaporation isperformed; after nanoparticles evaporated from the target the high vacuum state reach the substrate, the nanoparticles are deposited into an amorphous metal precursor film; after deposition, the precursor film is transported to low-pressure atmospheres with different oxygen partial pressures; and at different temperatures, crystallization and epitaxial growth are performed. By the method, co-evaporation of multi-metal elements with different melting points and sublimation temperatures is realized, the evaporation technology and conditions of the elements can be selected according to characteristics of the constituent elements, and the dynamic baseband can help realize the uniformity of the precursor component; the later oxidation treatment starts with the highly-refined nano-scale precursor, nucleation centers of later crystallization growth are many, and growth is fast and density is high; and by controlling the oxygen partial pressure, the reaction heat-treatment can be realized ata lower temperature, and then crystallization and epitaxial growth can be achieved at low temperature. The preparation method is simple.

The invention relates to a method for preparing an SSZ-13 molecular sieve from a Beta molecular sieve, which belongs to the technical field of molecular sieve preparation. According to the method forpreparing the SSZ-13 molecular sieve from the Beta molecular sieve, the treated Beta molecular sieve is used as a silicon source and an aluminum source, an amantadine derivative is used as a first-stage template agent for dynamic crystallization, then a second-stage template agent is added for static crystallization, and the SSZ-13 molecular sieve is prepared. According to the method for preparingthe SSZ-13 molecular sieve from the Beta molecular sieve, the use amount of an expensive template agent is greatly reduced, the production cost is reduced, the process is simple, and industrial production is facilitated; the prepared SSZ-13 molecular sieve has the advantages of high yield, high specific surface area and high crystallinity, and is wide in application range.

The invention provides a porous reducing state titanium dioxide crystal material and a preparation method thereof. The porous reducing state titanium dioxide crystal material has the anatase crystal phase; the specific surface area is 463 to 736 m<2>/g; the pore diameter is 1 to 4nm; the doping quantity of the surface Ti<3+> irons is 5.1 percent to 9.4 percent; the light absorption interval covers ultraviolet light and visible light intervals. Through an optoelectronic storage technology under the room temperature condition, the porous reducing state titanium dioxide crystal material with the large specific surface area is synthesized for the first time. The preparation method is different from a conventional synthesis method; a mild room temperature processing process is used for replacing a conventional high-energy processing process to realize the material crystallization and to overcome building defects. The porous reducing state titanium dioxide crystal material and the preparation method have the advantages that the synthesis technology is simple and green, and is suitable for large-scale production.

The invention discloses a caprolactam crystallization device and a using method. In the crystallization device, the crystallization tank is connected to the base and the transmission chain respectively, and the transmission chain is connected to the motor; the ventilation pipe is connected to the gas distributor, and the gas distributor is set inside the crystallization tank; the material pipe is set on the upper part of the crystallization tank, and the bottom of the material pipe It is lower than the upper edge of the crystallization tank; the conveyor belt is arranged at the lower part of the crystallization tank, and one end of the conveyor belt is located on the inner side vertically below the lower edge of the crystallization tank. First, control the crystallization tank to be in a tilted state; turn on the motor to rotate the crystallization tank through the transmission chain; turn on the conveyor belt button to make it move; send the gas into the crystallization tank through the ventilation pipe; send the material into the crystallization tank through the material pipe, The internal crystallization is dried to obtain caprolactam crystals, which are transported by the conveyor belt into the next process. The device of the invention has the advantages of scientific design, reasonable structure, high production efficiency and the like. The present invention is provided so that the resulting product has high purity, uniform particle size, high strength and low breakage rate.

The invention discloses an ultra-low-sodium salt seasoning product and a preparation method thereof. The ultra-low-sodium salt seasoning product is prepared from the following ingredients in parts by weight: 25 to 45 parts of sodium chloride, 25 to 45 parts of potassium chloride, 5 to 8 parts of cellulose, 5 to 8 parts of hemicelluloses, 5 parts of starch zymolyte and 4 to 8 parts of auxiliary materials. The potassium chloride saturated solution is attached onto the surface of the sodium chloride in a spraying mode; through drying, the sodium chloride and the potassium chloride are combined into one integral particle; the mixing is more uniform; the mouthfeel is more uniform, softer and more stable. The consumption of the sodium chloride is further reduced; the salt intake quantity of people every day can be greatly reduced, so that the probability of diseases of hypertension, heart disease, cerebral apoplexy and the like can be reduced; through adding starch zymolyte and various auxiliary materials, the competition taste sense sensing mechanism is used for inhibiting hydrophobic substances and expanding an ENaC special protein signal path; therefore the foreign taste of bitter taste, metal taste and the like brought by the potassium chloride and the like can be shielded; the integral flavor and delicious taste including salty taste and fresh taste can be improved.

The invention discloses an electric heating particle catcher aftertreatment system for a diesel engine, belongs to the technical field of diesel engine exhaust aftertreatment, and aims to improve reliability and adaptability of the particle catcher aftertreatment system. The electric heating particle catcher aftertreatment system for the diesel engine is composed of a metal electric heating DOC, an electric heating particle catcher, an engine ECU, a storage battery and an alternating current converter; ceramic carriers of the metal electric heating DOC and the electric heating particle catcherare changed into metal carriers; the metal carriers are connected with the alternating current converter and the storage battery correspondingly, can be connected with 220 V alternating current through the alternating current converter or can be directly powered by the storage battery to realize electrified heating so as to realize regeneration of the electric heating particle catcher, and meanwhile, through electrified heating of the metal electric heating DOC and the electric heating particle catcher, SCR front temperature can be increased, the functions of desulfurization and urea crystalremoval can be achieved, and normal running of a vehicle is ensured after sulfur poisoning or urea crystallization blockage of an aftertreatment device occurs.

The present invention discloses a low-temperature evaporative crystallization apparatus. The apparatus comprises: a curtain type evaporator, which comprises an evaporation chamber, a plurality of evaporation modules and a water distribution mother pipe, wherein each evaporation module comprises a plurality of curtain cloth assemblies arranged in parallel at an equal, and each curtain cloth assembly comprises a hydrophilic cord fabric and a water distribution branch pipe; a crystallizing pond, which is arranged at the bottom of the evaporation chamber and used for collecting materials and crystals falling from the hydrophilic cord fabric; an air exhausting mechanism, which communicates with the evaporation chamber and used for generating negative pressure to exhaust evaporated steam in theevaporation chamber; and a heating device, which is separately connected with the water distribution mother pipe and the crystallizing pond and used for heating the materials in the crystallizing pondand then conveying the materials into the water distribution mother pipe. According to the invention, evaporation and crystallization of the materials can be achieved at low temperature and natural atmospheric pressure, and the evaporative crystallization device has the advantages of low operation pressure, simple structure, convenience in operation and the like.

The present invention relates to a concentrated salt water zero discharge system and a concentrated salt water zero discharge method based on atomization evaporation. The concentrated salt water zero discharge method comprises adjusting and temporary storage, atomizing concentration, and atomizing crystallization. The concentrated salt water zero discharge system comprises an adjustment pool and a crystallization pool, and further comprises an atomizing evaporation circulation concentration pool, a reflux pipe, an atomizing crystallization device, an adjustment pool water outlet control valve and an atomizing evaporation circulation concentration pool water outlet control valve. With the technical scheme of the present invention, concentrated salt water is atomized into small water drips with a diameter of 100-150 [mu]m by using mechanical equipment so as to increase the heat exchange specific surface area and increase the natural evaporation efficiency by 2-5 times; by combining the atomizing evaporation device and the reasonable system control, the requirement on the land occupation is reduced by 50-80% compared to the traditional evaporation pond concentrated salt water treatment technology; and through the method comprising adjusting stored concentrated salt water by the adjustment pool, atomizing concentration, and atomizing crystallization, by combining the system control and the meteorological monitoring, the evaporation concentration and crystallization of the concentrated salt water can be achieved, and the concentrated salt water treatment zero discharging can be achieved.

The invention provides a spray drying system. The spray drying system comprises a shell, wherein a volute heating plate and a vertical cleaning brush which are vertically placed are arranged in the shell; the outer end of the volute heating plate is communicated with a steam inlet; the inner end of the volute heating plate is communicated with a hollow pipeline of the lower part of a rotating shaft arranged at the center position of the shell; the hollow pipeline is connected to a condensate outlet; the two ends of the vertical cleaning brush are connected to the rotating shaft, and the vertical cleaning brush is driven by the rotating shaft to reciprocate along the volute heating plate; a material liquid inlet pipe is arranged at the upper side of the volute heating plate; a spray head isarranged at the lower part of the material liquid inlet pipe; a horizontal drying plate is arranged at the lower side of the volute heating plate; a horizontal cleaning brush is arranged on the horizontal drying plate; one end of the horizontal cleaning brush is fixedly connected to the rotating shaft; and a discharge port is formed in the bottom of the horizontal drying plate. The spray drying system has the advantages that a crystalline material is not easy to agglomerate and harden, the material solution drying efficiency is high, and the energy saving effect is remarkable.

The invention discloses high-temperature continuous evaporative crystallization equipment which comprises a high-temperature evaporator, a steam compressor connected with the high-temperature evaporator through a first pipeline and a high-temperature crystallizer connected with the steam compressor in parallel through a second pipeline. The high-temperature evaporator comprises a heat exchange cavity and an evaporation cavity. The steam compressor communicates with a first steam inlet and a first steam outlet in the heat exchange cavity and the evaporation cavity through the two ends of a first pipeline correspondingly. The high-temperature crystallizer comprises a crystallization cavity, a heating device and a stirring device; a concentrated solution formed by heating and evaporating in the heat exchange cavity is conveyed to the crystallization cavity; and the steam compressor is respectively communicated with the heating device and a second steam inlet and a second steam outlet on the crystallization cavity through two ends of a second pipeline. According to the equipment, on the basis of not changing parts of the MVR high-temperature evaporation system and not increasing new parts, the high-temperature crystallizer is connected with the MVR high-temperature evaporation system in parallel, so that the advantages of large treatment capacity and low energy consumption in the MVR high-temperature evaporation system are reserved, and meanwhile, the crystallization of a concentrated solution is realized.

The invention discloses a method for carrying out fluidized extraction on spodumene by utilizing sulfide. The method comprises the following steps: uniformly mixing sulfide and spodumene powder, and carrying out fluidized high-temperature roasting on the mixture; and then extracting the calcined spodumene powder by using an extracting solution to obtain a leaching solution containing lithium sulfate. By roasting the mixture of sulfide and spodumene, lithium in spodumene can be extracted with low energy consumption, so that energy consumption is low, and environmental pollution is avoided; andthe extracted lithium salt has high purity and can be used in the fields of lithium batteries, nuclear power and the like.

The invention provides a nickel-titanium shape memory alloy micro-wire surface machining process and relates to the technical field of material machining. Nitriding treatment is conducted after repeated cold drawing process treatment is conducted on a preprocessed nickel-titanium shape memory alloy micro-wire, so that the nickel-titanium shape memory alloy micro-wire long in fatigue life are obtained. Cold drawing treatment is conducted on the nickel-titanium shape memory alloy micro-wire through a wire-drawing die, an amorphous layer can be formed on the surface of the micro-wire in an accurate control manner, nitriding treatment is conducted on this basis, crystallization of the amorphous layer can be achieved, and a hardening layer with the thickness being accurate and controllable is formed. The nickel-titanium shape memory alloy micro-wire surface machining process is suitable for industrially, easily and controllably machining the hardening layer on the surface of the nickel-titanium shape memory alloy micro-wire, generation of surface fatigue cracks of the nickel-titanium shape memory alloy micro-wire is effectively restrained, the fatigue life of the shape memory alloy micro-wire is greatly prolonged, and the own shape memory function of the wire cannot be damaged.

The invention provides a preparation method of low-cost glass ceramic. Copper slag and high-temperature molten converter slag are mixed, molten reduction tailings generated after iron is reduced and recovered and zinc-containing dust serve as base materials of the low-cost glass ceramic, and a one-step heat treatment process is carried out to prepare the low-cost glass ceramic. The process can be arranged near a high-temperature converter, the solid copper slag and the reducing agent are poured into the liquid converter slag after deslagging and are heated to be completely molten, glass ceramic is prepared from generated secondary tailings, and iron in the glass ceramic is recycled. According to the method, waste of the recovery process can be completely utilized, the economic additional value of the waste is improved, solid waste is reduced, the effect of protecting the environment is achieved, and the purpose of efficiently utilizing the waste heat of the molten converter slag is achieved; and meanwhile, the technological process is simplified. The secondary tailings obtained after reduction of the copper slag and the molten converter slag are used as the base material of the glass ceramic, the preparation cost is low, the price advantage is great, the economic benefit is good, the performance of the prepared glass ceramic is superior to that of natural stone, and the application range is wide.

The invention relates to a low-temperature solidified powder production line system and a production process thereof. The production line system comprises a mixer, an extruder, a roller type tablet press, a cyclone separator and a stirring tank which are sequentially arranged according to a production process route. The production process comprises the following steps: S1, low-temperature mixing;S2, low-temperature extrusion; S3, tabletting at low temperature; S4, separation; S5, stirring; and S6, low-temperature grinding. Transformation is carried out on the basis of existing powder coatingproduction line equipment, so that the material temperature in each process node is controllable and adjustable, and the powder coating production line equipment can be suitable for the production characteristic of low-temperature solidified powder. In the technological process, different temperature parameters are set for mixing, extrusion and tabletting respectively, so that the materials alwayskeep good properties on the technological route, and finally, the materials meet the grinding requirements through the quenching process of heating and cooling in sequence in the stirring tank.

The invention discloses a method for synthesizing cytidine diphosphate, and belongs to the field of nucleoside synthesis in organic chemistry. The method comprises the following reaction steps that cytidine monophosphate and dichlorophosphoryl morpholine serve as raw materials, condensation is conducted under the base catalysis effect, then a crude product cytidine diphosphate is obtained through acyl chloride hydrolysis, recrystallization is conducted through an alcohol/water mixed system, and a finished cytidine diphosphate product with the HPLC purity larger than 95% is obtained. The whole reaction only comprises two steps, reaction operation is simple, and the total yield reaches 70% or above.