65 results about "Sonochemistry" patented technology

The invention relates to a method for preparing endogenetic particle reinforced metal matrix composites under the coupling effect of a magnetic field and supersonic waves. The method comprises: adjusting the temperature of a metal matrix fused mass to the reaction initial temperature after refining, adding a reactant which can generate a particle phase with the fused mass through the reaction in situ for implementing the synthesis reaction, standing the mixture after the reaction is over, and cooling the mixture to the pouring temperature for pouring; and the method is characterized in that: the magnetic field and the high-intensity ultrasonic field are simultaneously exerted in the reaction synthesis process to realize the synthesis of endogenetic particle reinforced metal matrix composites under the coupling effect of the magnetic field and the high-intensity ultrasonic field. The magnetic field can be an intense pulse magnetic field, a high frequency oscillation magnetic field or a low frequency alternating magnetic field. In the method, the coupling effect of the magnetic field and the ultrasonic field makes the particle sizes be thinned and dispersed evenly; the ultrasonic vibration agitation and electromagnetic stirring functions improve the composite dynamic condition, and the compounding of the particle phase and a base metal interface is better; and the co-action of magnetochemistry and sonochemistry improves the thermodynamic condition of the reaction in situ, as well as speeding up the reaction in situ and controlling the growth of the particle phase.

The invention utilizes multiple frequency megasonic generators driving multiple frequency harmonic transducers. Generator signals that increase cavitation efficiency and that have successive time periods with predominantly stable cavitation and predominantly transient cavitation further improve the performance of the cleaning, microbiological inactivation, sonochemistry or processing systems. Probes that monitor the megasonics and feedback the information to the generator provide consistency of process.

The invention utilizes multiple frequency ultrasound generators driving multiple frequency harmonic transducer arrays at sweeping frequencies into the megasonic range. Generator signals that increase cavitation efficiency and that have successive time periods with predominantly stable cavitation and predominantly transient cavitation further improve the performance of the cleaning, microbiological inactivation, sonochemistry or processing systems. Probes that monitor the ultrasound and feedback the information to the generator provide consistency of process.

The invention utilizes multiple frequency ultrasound generators driving multiple frequency harmonic transducer arrays at sweeping frequencies. Generator signals that increase cavitation efficiency and that have successive time periods with predominantly stable cavitation and predominantly transient cavitation further improve the performance of the cleaning, microbiological inactivation, sonochemistry or processing systems. Probes that monitor the ultrasound and feedback the information to the generator provide consistency of process.

The invention relates to metal-coated composite powder, in particular to a sonochemistry preparation method allowing the surface of copper powder to be coated with a nickel and phosphorus alloy layer. The method is characterized in that high-energy ultrasonic agitation is effectively added into a traditional process of chemical plating, and the cavitation effect, the oscillation effect and other effects of the high-energy ultrasonic agitation are utilized, so that the preparation efficiency of composite copper powder coated with nickel is improved, and the problems of powder accumulating and the like are solved. In addition, when the copper powder coated with the nickel and phosphorus is prepared, sodium hypophosphite is used as a reducing agent of an acidic chemical plating solution, and the plating solution is easy to prepare and high in stability; due to the fact that activating treatment is carried out on the copper powder through hydrochloric acid before plating, the defect that traditionally, when salt activation and sensibilization are carried out on the surface of the copper powder, precious metal palladium salt is brought into the plating solution, so that the plating solution is decomposed is overcome, and also the activation processes of the powder are simplified. Meanwhile, because the high-energy ultrasonic agitation is kept in the whole plating process, the prepared composite powder is excellent in dispersity, the coating layer of the powder is complete and uniform, the plating of the powder is compact, and the powder is in an amorphous state.

The invention utilizes single and multiple frequency ultrasound generators driving single and multiple frequency resonant and harmonic transducer arrays at frequencies into the megasonic range. Generator signals that increase cavitation efficiency improve the performance of the cleaning, microbiological inactivation, sonochemistry or processing systems.

An acoustic crystal structure includes defect cavities that concentrate the driving pressure from applied sound waves into the cavities to cavitate gas bubbles in a liquid to produce sonoluminescence. This device may be used to study sonoluminescence or cavitation or to perform sonochemistry, nuclear fusion etc. in the cavities. A waveguide may be operatively coupled to the acoustic crystal to extract, collect and route a band of electromagnetic (EM) radiation around a specified source wavelength to an output port for emission by an antenna to provide an EM source. The waveguide may, for example, be a photonic crystal defect waveguide, a photonic crystal optical fiber or Sommerfeld waveguide. The marriage of the sonoluminescence phenomena with an acoustic crystal and embedded waveguide provides for an efficient source of narrow or broad band IR or THz radiation

The invention relates to a preparation method of nanometer WC-Co composite powder, which belongs to the technical field of preparation of a nanometer composite material. The preparation method is characterized in that nanometer WC powder of which the grain size is 30-200 nm is used as a raw material, the raw material of the nanometer WC powder can be subjected to low-temperature ultrasonic chemical plating by adding plating solution in the nanometer WC powder after the nanometer WC powder is sensitized, cleaned, activated, cleaned and dispersed by adding a dispersing agent under an ultrasound condition, the plating liquid for chemical plating is formed by 14-26 g / l of CoSO4.H2O, 100-150 g / l of KNaC4H4O6.4H2O, 18-40 g / l of NaH2PO2.H2O and 40-60 g / l of (NH4)2SO4, and pH (Potential Of Hydrogen) of the plating liquid is controlled to be 8-11 while plating is carried out. According to the preparation method disclosed by the invention, the problem that nanometer WC is easy to unite during a chemical plating process is solved, a uniform metallic cobalt clad layer is obtained on the surface of the nanometer WC, the technological process is simple, the cost is lower, the size of the prepared nanometer composite material is less than or equal to 260 nm, and the defect of the prepared nanometer composite material in application can be greatly improved.

The present invention is an apparatus for ultrasonically treating a liquid to generate a product. The apparatus is capable of treating a continuously-flowing, or intermittently-flowing, liquid along a line segment coincident with the flow path of the liquid. The apparatus has one or more ultrasonic transducers positioned asymmetrically about the line segment. The ultrasonic field encompasses the line segment and the ultrasonic energy may be concentrated along the line segment. Lysing treatments have been successfully achieved with efficiencies of greater than 99% using ultrasound at MHz frequencies without erosion or heating problems and without the need for chemical or mechanical pretreatment, or contrast agents. The present invention overcomes drawbacks of current ultrasonic treatments beyond lysing and opens up new sonochemical and sonophysical processing opportunities.

An acoustic crystal structure includes defect cavities that concentrate the driving pressure from applied sound waves into the cavities to cavitate gas bubbles in a liquid to produce sonoluminescence. This device may be used to study sonoluminescence or cavitation or to perform sonochemistry, nuclear fusion etc. in the cavities. A waveguide may be operatively coupled to the acoustic crystal to extract, collect and route a band of electromagnetic (EM) radiation around a specified source wavelength to an output port for emission by an antenna to provide an EM source. The waveguide may, for example, be a photonic crystal defect waveguide, a photonic crystal optical fiber or Sommerfeld waveguide. The marriage of the sonoluminescence phenomena with an acoustic crystal and embedded waveguide provides for an efficient source of narrow or broad band IR or THz radiation.

The invention provides an ultrasonic magneto-rheological chemical composite polishing device. The ultrasonic magneto-rheological chemical composite polishing device comprises a rack, a cup-shaped polishing disc, a magneto-rheological tool head and an ultrasonic vibration mechanism, wherein the cup-shaped polishing disc is arranged on the rack and used for containing a working solution and placing a workpiece to be machined, and the cup-shaped polishing disc can move back and forth in the horizontal plane relative to the rack; the magneto-rheological tool head has magnetism and is used for being inserted into the working solution and acting with the working solution to enable the working solution to form a magneto-rheological grinding head; and the ultrasonic vibration mechanism comprises an ultrasonic generator, an ultrasonic transducer electrically connected with the ultrasonic generator and ultrasonic amplitude transformers arranged at the output end of the ultrasonic transducer, the ultrasonic amplitude transformers are arranged up and down, the magneto-rheological tool head is arranged at the lower ends of the ultrasonic amplitude transformers, the upper ends of the ultrasonic amplitude transformers are connected with the output end of the ultrasonic transducer, and the ultrasonic transducer is arranged on the rack in an up-down moving mode. According to the polishing device, ultrasonic high-frequency vibration, the acoustic-chemical effect and the magneto-rheological effect are combined, and therefore the polishing effect can be effectively improved.

A device and method for sono-chemical processing, including a reactor bounded by a substantially cylindrical wall, the reactor having: a reaction volume, defined by the wall; first and second magnetostrictors, associated with the reaction volume, the wall and the magnetostrictors designed and disposed such that the first magnetostrictor produces a first series of ultrasonic waves having a first frequency within the reaction volume, the second magnetostrictor produces a second series of ultrasonic waves having a second frequency within the reaction volume, wherein the second frequency exceeds the first frequency.

The invention discloses an Al2O3-Tob / HA compound sewage treatment material, and a preparation method and application thereof. The preparation method comprises the following steps: using pre-pickling pulverized fuel ash as a silicon source and an aluminium source, using slaked lime Ca(OH)2 as a symbiotic calcium source and using phosphoric acid as a phosphorus source; at first, adopting a sonochemistry method, and controlling the temperature and regulating the pH value to 10.5 to 11.5 to prepare an aluminum substituted tobermorite performed polymer; then adding a phosphoric acid solution to obtain an Al2O3-Tob and HA symbiotic co-polymer; finally adopting a hydrothermal vapor pressure method to prepare an Al2O3-Tob / HA compound sewage treatment material of which the compound ratio X is 2 to 4. Test results show that the product impurity phases are few, the purity is high, Al2O3-Tob and HA crystallization conditions are favorable, and the product has a net framework structure, large specific surface area, and a strong property for adsorbing and desorbing heavy metal ion Cd<2+>, and the adsorbing property is enhanced along with the increase of the compound ratio in an experimental scale. The production process is simple, the operation process is convenient, the production cost is low, and the preparation method is a practical and effective method for using pulverized fuel ash solid wastes.

The invention belongs to the preparing field of nanometer titania crystal, particularly relates to a sonochemistry preparing method of nitrogen and rare earth element codope nanometer titania crystal. The sonochemistry preparing method is characterized in that titanate or titanium, nitrogen sources and nitrate having rare earth primary color serve as raw material, after mixture is even, under normal pressure of 70-90 DEG C, dispersing agents are added to the raw materials, and ultrasonic treatment is conducted for 3-4 hours to obtain white precipitate. The precipitate is separated in a centrifuged mode, washed and dried in a vacuum mode, and products having special crystal form structures are obtained. The sonochemistry preparing method is simple in operation step, reasonable in design, low in reaction temperature, and simple in process, produced nanometer titania has the advantages of being small in product grain diameter and narrow in grain diameter distribution range, and the sonochemistry preparing method is suitable for being popularized and applied widely.

The invention relates to a method for preparing AgSbTe2 thermoelectric compound powder, in particular to a sonochemistry method for preparing the AgSbTe2 thermoelectric compound powder. The method is characterized by including the following steps: 1) deionized water is used as solvent, and analytically pure AgNO3, C4H4KO7Sb-1 / 2H2O and TeO2 are added to and stirred and mixed with the solvent, thereby obtaining mixed liquid A; 2) ammonia is poured into the mixed liquid A, and the mixture obtained is processed by ultrasound for 30 minutes, thereby obtaining mixed liquid B; 3) reducing agent NaBH4 is added to and thoroughly reacts with the mixed liquid B under ultrasound for 2 to 6 hours, thereby obtaining a product C; 4) the product C obtained in the step 3) is centrifuged and is dried in a vacuum drying oven to obtain a precursor of the AgSbTe2 thermoelectric compound; and 5) the precursor obtained in the step 4) is processed by reduction in hydrogen at 450 to 500 DEG C for 1 to 4 hours, thereby obtaining the AgSbTe2 thermoelectric compound powder. The method has the advantages of low-cost and easily accessed raw materials, simple and easily controlled technology, short reaction time, low energy consumption, high safety, favorable repeatability and no pollution, and can be used for large-scale preparation.

Tooth whitening device for whitening teeth using sonochemistry includes a body, and an ultrasonic transducer provided in the body. The ultrasonic transducer is configured for producing ultrasonic waves in the range of 20-100 kHz, and good results have been achieved with ultrasonic waves at a frequency of 40 kHz. There is an ultrasonic horn provided on the body, and the ultrasonic horn is operatively connected with the ultrasonic transducer. A liquid retaining element is provided on the ultrasonic horn, and the liquid retaining element is configured for retaining a liquid tooth whitening composition against a user's teeth. The liquid retaining element may be a sponge or a replaceable pad, such as a foam pad.

The invention relates to a sonochemical-synergizing-electrochemical method for continuously treating oilfield wastewater, belonging to the wastewater treatment field during oilfield exploitation. The method disclosed by the invention comprises the following steps: (1) oxidizing and degrading organic pollutants in the oilfield in a complex oxidizing method of synergizing sonochemistry and electrochemistry, wherein an ultrasonic frequency is 20-500 Hz, and an electric current density is 50-5000 A / m<2>; (2) cleaning scale on a synergistically and electrochemically oxidized cathode by using an ultrasonic cleaning method; and (3) coagulating, air-supporting or depositing, and filtering. By using the method for treating oilfield wastewater provided by the invention, medicaments are avoided from being added, medicament resistance of species in the water body is avoided, and phenomena such as discontinuous electrolytic process, low electrolytic efficiency due to the cathode scale caused by traditional electrochemical electrolysis and the like are avoided, thereby ensuring stable effluent quality and better purifying effect, so as to decrease water treatment costs.

A method of processing a liquid including (a) passing a flow of the liquid through a local constriction into an outlet channel, the flow of liquid having a velocity of at least 1.4 m / s at the exit end of the outlet channel, the flow of liquid in the outlet channel containing cavitation bubbles, and (b) collapsing the cavitation bubbles by subjecting the cavitation bubbles to a water hammer hydraulic pulse pressure resulting from periodically rapidly closing the outlet channel. A device for practicing the method is also disclosed.

A transducer for converting flow energy to acoustic energy, requiring little or no electrical excitation of the device. Process liquid flows through an orifice into the device, past oscillatory members made of resilient material in a high-Q configuration prone to vibration. The turbulent flow of the process liquid causes the oscillatory members to vibrate and, eventually, to resonate. Acoustic waves propagate from one oscillatory member to another oscillatory member and back, conserving acoustical energy and exerting extreme compression and shear forces on the process liquid. Rarefaction may result in cavitation, resulting in extreme local and instantaneous pressures and temperatures. The device is suitable for applying physical work to process fluid for the purpose of destroying bacteria, homogenization, or promoting sonochemical reactions between fluids.

The invention provides a nano silver copper wrapped welding flux preparing method based on phonochemistry. The preparing method comprises the following steps that a copper salt organic solvent solution and a sodium phosphite and protective agent organic solvent solution are mixed, horn type pulse ultrasonic waves straight downwards are applied into the solution, copper nano particle dispersion liquid is obtained through the heating reaction, and Cu nano particles are obtained through cooling, centrifuging and washing; the Cu nano particles and a reducing agent are added in deionized water to be evenly mixed, a silver salt solution is added for the reaction at 30-50 DEG C, silver copper wrapped nano particle dispersion liquid is obtained, the silver copper wrapped nano particle dispersion liquid is centrifuged and washed, and silver copper wrapped nano particles are obtained; and the silver copper wrapped nano particles and a welding paste organic solvent are evenly mixed, and silver copper wrapped nano particle welding paste is obtained. The silver copper wrapped nano particle welding flux prepared through the technical scheme is high in reliability and has the characteristics of low-temperature connection and high-temperature service, protective gas is not needed in the preparing process, the technology is simple, and green and environment protection are achieved.

Ultrasound generation produces in general an acoustic field, characterized by both inertial and non-inertial acoustic cavitation, a process by which non-linear oscillation of a microbubble and its associated micro streaming and radiation force generated by ultrasound can lead to intense heating effects in a material, solution or biological cell which comes into contact with a conventional ultrasound transmission. Typically an ultrasound signal contains both an acoustic vibration effect, a resonance effect where a material receiving the ultrasound transmission resonates in response to the transmission, and unfortunately in many applications a damaging cavitation effect and a damaging thermal effect. This invention is both a method and an apparatus to reduce the damaging effects of ultrasound in both the thermal and mechanical effects and to provide a safer ultrasonic process which can be used in sonochemistry applications, material science and for biological or medical applications.

The invention relates to an experimental device of the multi-transducer coordinating with a sonochemistry reaction field and a working method thereof. The experimental device comprises a reactor, wherein a plurality of transducers are arranged in the reactor; the transducers are controlled by multiple sets of ultrasonic signal generators, and send out the corresponding ultrasonic waves; according to the experimental device of the multi-transducer coordinating with the sonochemistry reaction field and the working method thereof, provided by the invention, ultrasonic parameters can be adjusted through ways such as signal generator parameters and the like; whether the transducers work or not can be controlled by a core controller; the location and angle of a first transducer can be adjusted by a three-axis positioning device; a sound field and a sonochemistry reaction field generated by the single action or combined action of different forms of ultrasonic waves can be studied by the above changes.

A method for measuring the sound field distribution image by acousto-chemical luminescent imaging includes adding chemical luminescent reagent to water, generating cavitation in the water by the ultrasonic field to be tested, reaction of free group with said reagent to generate acousto-chemical light, converting the light signals to electric signals and then to digital signals, processing them to obtain acousto-chemical luminescent image, and directly observing the sound field distribution. Its apparatus is composed of light receiver, A / D converter, computer and software.

The invention relates to a sonochemistrical luminous tomography method for tumour, which is that after distributing of sonosensitizer in tumour group, generating active oxygen-derived free radicals by scanning point by point and sensitizing used focusing ultrasound; translating the active oxygen-derived free radicals generated during sonosensitizing process real time and directly by chemical luminous agents into photons and radiating out; based on that, simulating the imaging of tumour group by optics detection technique. The apparatus comprises ultrasound producing groupware, light receiving groupware, A / D converter, triaxiality scanning device and computer; wherein ultrasound producing groupware and triaxiality scanning device link to computer, light receiving groupware and A / D converter link to computer in turn. The invention combines strong penetrating ability of focusing ultrasound to body and the advantages of high sensitivity and intactness of optics imaging, brings no radioactive damage to organism.

A method of making zinc sulfide based electroluminescent phosphors is described wherein a first-fired zinc sulfide material having a hexagonal β-ZnS crystal structure is at least partially converted to a distorted hexagonal β-ZnS crystal structure by ultrasonic irradiation. The first-fired material is then fired at a lower temperature to form an electroluminescent phosphor.

The invention utilizes single and multiple frequency ultrasound generators driving single and multiple frequency resonant and harmonic transducer arrays at frequencies into the megasonic range. Generator signals that increase cavitation efficiency improve the performance of the cleaning, microbiological inactivation, sonochemistry or processing systems.

The invention utilizes multiple frequency megasonic generators driving multiple frequency harmonic transducers. Generator signals that increase cavitation efficiency and that have successive time periods with predominantly stable cavitation and predominantly transient cavitation further improve the performance of the cleaning, microbiological inactivation, sonochemistry or processing systems. Probes that monitor the megasonics and feedback the information to the generator provide consistency of process.

The invention discloses a preparation method of a dual-layer wave absorbing material adopting a hollow structure, and belongs to the technical field of preparation of the wave absorbing material. The dual-layer wave absorbing material adopting the hollow structure, disclosed by the invention, is prepared through the following steps: generating ammonia and acetic aldehyde through a hexamethylene tetramine reaction; after the ammonia is evaporated to form bubbles, enabling the bubbles to become a polymerization center under the combined action of the stickiness of ethanediol and the adsorption of polyvinylpyrrolidone, and then enabling unstable crystal nanometer particles to be gathered around a gas-liquid interface through the minimization of interface energy and the driving of the interaction of magnetic dipoles; when surface energy and binding energy are balanced, enabling the bubbles to stay in an aggregate to form a hollow ball structure, so as to prepare hollow ferroferric oxide; performing ball milling and blending on the hollow ferroferric oxide and attapulgite clay powder, and plating a layer of nickel-cobalt on composite powder by a sonochemistry plating method, so that the dual-layer wave absorbing material adopting the hollow structure is obtained. Examples prove that the absorption width of wave frequency and the position of absorption peaks can be changed through the wave absorbing material, besides, the preparation method is simple and easy to operate, and the wave absorbing material has excellent wave absorbing properties.

A method and device for processing a liquid with cavitation uses a channel element with passageways having local constrictions and a moving rotor surrounding the channel element. The rotor contains a plurality of rotor channels that are moved during rotation to periodically line up with the passageways in the channel element. To operate the device, liquid is passed through the local constriction in the passageway into an outlet channel at a velocity of at least 1.4 m / s at the exit of the outlet channel to form cavitation bubbles. Cavitation bubbles in the liquid in the outlet channel are collapsed by subjecting the cavitation bubbles to a water hammer hydraulic pulse pressure resulting from periodically rapidly closing of the outlet channel by rotation of the rotor.

The invention discloses a method for mechanochemical coupling ultrasonic chemical strengthening of metal leaching in secondary zinc oxide powder, comprising: mechanical activation: mechanically activating raw materials containing secondary zinc oxide powder to obtain an activation material; ultrasonic treatment: combining the activation material with the The acidic leaching solution is mixed to obtain a mixture, and the mixture is subjected to ultrasonic treatment, and the obtained liquid phase is the leachate. The combination of mechanochemical activation and sonochemistry enhanced the leaching rate and leaching rate of multi-metals through structural destruction and cavitation of secondary zinc oxide powder. This process can indirectly reduce the use concentration of acidic leaching solution and shorten the leaching time. In actual production, the specific application of this process can reduce the anti-corrosion cost and operating production cost of reaction equipment, and indirectly produce good production benefits.