32results about How to "Large cavity volume" patented technology

The present invention relates to the technical field of hollow sphere preparation, particularly to a method for preparing hollow spheres through a microwave-assisted aerosol. The method comprises: A, dispersing a hollow sphere shell precursor in a polar solvent, adding an ammonium salt to form a colloidal solution or true solution, ie., a precursor solution; B, carrying out atomization on the precursor solution prepared in the step A to form aerosol liquid droplets; and C, introducing the aerosol liquid droplets prepared in the step B into a microwave generator to carry out microwave irradiation to obtain the hollow sphere powder particles. According to the present invention, the hollow sphere powder preparation method has characteristics of short production period, simple operation, no pollution, easy scale-up and easy promotion application, wherein the microstructure of the prepared hollow sphere powder is not easily damaged.

The invention relates to a thulium laser based on a wavelength locked semiconductor laser module, and belongs to the technical field of laser. The thulium laser comprises a wavelength locked narrow linewidth semiconductor laser module, a pump light collimating and focusing module and a laser resonant cavity module. Semiconductor pump light is outputted to the pump light collimating and focusing module through the wavelength locked narrow linewidth semiconductor laser module and then outputted through the laser resonant cavity module. With application of the technical scheme, efficient output of the high-power Tm laser under the room temperature can be realized and the optical-to-optical conversion efficiency can be increased to 45%.

The invention discloses a copper oxide-cobalt oxide co-doped alumina hollow sphere material and a preparation method thereof, and belongs to the field of inorganic functional materials. The preparation method comprises following steps: dissolving cane sugar, aluminum nitrate nonahydrate, copper nitrate with 2.5 H2O molecules, and cobalt nitrate hexahydrate into deionized water, stirring for 30 to50 minutes at a room temperature to obtain a clear and transparent solution; transferring the transparent solution to a stainless steel reactor with a polytetrafluoroethylene inner container, carryingout hydrothermal reactions for 20 to 30 hours at a temperature of 180 to 200 DEG C to obtain a hydrothermal reaction product A; subjecting the A to suction filtration to obtain a black brown solid, washing the solid by deionized water and anhydrous ethanol for several times, drying the solid in vacuum for 5-8 hours at a temperature of 80-100 DEG C to obtain solid powder B; burning the B in a box-type resistance furnace for 5 to 8 hours at a temperature of 500-600 DEG C to obtain the copper oxide-cobalt oxide co-doped alumina hollow sphere material. The method has the advantages of simple andconvenient operation, green, environmental friendliness, and high yield. The morphology is easy to control. The provided material has a great application value in fields such as catalyst carriers, drug delivery, luminous materials, chemical sensors, ceramic, pigments, and the like.

The invention discloses a method for synthesizing an ultrathin hollow sphere micron zinc aluminate in one step by a flame synthesis method. According to the method, an aqueous solution of Zn(NO3)2.6H2O and Al(NO3)3.9H2O serves as a precursor solution, nitrogen serves as carrier gas, the precursor solution is fed into a high-temperature plane flame area formed by ethylene, oxygen and the carrier gas in a jet flow atomization mode, and zinc aluminate is rapidly deposited on a cooling substrate through the extremely large temperature gradient between high-temperature flame and a collecting plateunder the flame. The ultrathin hollow sphere micron zinc aluminate synthesized by the method is thin in sphere wall and large in middle cavity volume, has lower density and higher thermal resistance,and is suitable for the field of flame retardance and smoke abatement.

The invention discloses a preparation method of a durable hydrophobic anti-reflection film for an evacuated collector tube surface. The method utilizes magnesium acetate tetrahydrate and hydrofluoricacid as raw materials to synthesize Mg(OH)2-xFx particle sol with a hollow rod structure by a solvothermal method, and then a hydrolysis product of Mg(OH)2-xFx and MTES is gelled through hydroxyl group condensation to obtain a CH3-SiO2-MgF2 composite particle sol. A layer of anti-reflection film is coated on the surface of glass with a light transmittance being 92% by a dipping and pulling method.After calcination at a temperature of 350 DEG C or lower, the obtained anti-reflection film has an average light transmittance of 98% or more in a visible light range and a contact angle of 133 degrees. After the anti-reflection film is irradiated for 1000 hours under 150W ultraviolet light, the average light transmittance can still be maintained 98% or more, and the contact angle can still be maintained a hydrophobic state of 120 degrees or above.

The invention discloses a muffler for large-displacement luxury motorcycles. The muffler is in a two-layer five-cavity structure divided into two upper cavities and three lower cavities by a partition. The muffler comprises double intake pipes, the partition, a housing, an insert pipe, a tail pipe, an exhaust valve and the like. The muffler allows noise under both high and low frequencies to be suppressed finely. The application of exhaust valve technology coordinates noise reduction and engine power. The tail pipe is provided with the exhaust valve which is manually turned on or off by a racing driver. The muffler has the advantages that the three expansion cavities, the two glass-wool-filled cavities and the insert pipe coordinate to reduce noise, and acoustic energy is reduced greatly; the cavities have large volume, and the muffler is applicable to large-displacement luxury motorcycles; the exhaust valve mounted on the tail pipe is manually controlled by the racing driver so that noise reduction adjustment and engine power adjustment are balanced.

The invention discloses a method for preparing a carbon nano hollow polyhedron by using a hydrothermal method and belongs to the field of nano graphite preparation. According to the method, a chemicalsynthesis method is utilized, pyrene with a benzene ring structure is taken as a raw material, a reaction is carried out under an alkaline condition and at a relatively low temperature, and a prepared reaction product is high in graphitization degree, the cavity volume is large, and the reaction product has potential characteristics of light weight and high strength. The method is low in energy consumption, short in consumed time and high in product quality, the adopted chemical synthesis method is completely different from the prior art, and innovation and novelty are achieved.

The invention provides an oil return structure of a compressor, the compressor and an air conditioner, the oil return structure of the compressor comprises a static disc and a cover body, the end face, facing the cover body, of the static disc is provided with a first protrusion protruding towards the cover body, and/or the end face, facing the static disc, of the cover body is provided with a second protrusion protruding towards the static disc; the first protrusion is matched with the cover body, or the second protrusion is matched with the static disc, or the first protrusion is matched with the second protrusion so that a cavity used for exhausting and/or separating oil can be formed on the inner periphery of the protrusion, and the inner periphery of the cover body and the outer periphery of the protrusion jointly define an oil storage cavity used for storing oil. The oil storage cavity is located on the radial outer side of the exhaust and/or oil distribution cavity. Through the effective design on the static disc and the cover body, the space of the static disc and the cover body is effectively utilized, so that the oil storage cavity is effectively formed on the basis of not increasing the axial and radial sizes of the compressor, and the weight and the size of the compressor are not increased while the oil storage volume of lubricating oil is increased.

The invention discloses a vehicle protection device convenient to maintain. The vehicle protection device convenient to maintain is characterized by comprising an anti-collision housing and a buffering structure, wherein the anti-collision housing is arranged in front of a front end shell of a vehicle and the buffering structure is arranged between the anti-collision housing and the front end shell. The buffering structure comprises a plurality of buffering units, which are respectively arranged in at least two lines in the transverse direction; arc end surfaces are arranged at one ends, facing the anti-collision housing, of the buffering units; and the two adjacent buffering units are connected with each other in a clamped manner. According to the vehicle protection device convenient to maintain, the buffering structure is arranged between the anti-collision housing and the front end shell; on the one hand, the arc end surfaces are arranged at one ends, facing the anti-collision housing, of the buffering units so that the buffering units can preferably bear forces; especially, the plurality of lines of the arc force bearing structures match each other so that the acting effect isbetter; on the other hand, the longitudinal buffering units in each line are connected with each other in a clamped manner so that the buffering units are convenient to detach and can be updated in time if being partially damaged to avoid integral changing and reduce cost. On the whole, the good state is conveniently kept at any time to protect the vehicle body and a protection effect in collisionis more optimal.

The invention discloses a preparation packaging method. The preparation packaging method comprises steps as follows: two mutually attached soft films are softened; two corresponding sides of each soft film and the bottoms of the two soft films are connected in a sealing manner; mutually opposing acting force is applied to the middles of the two soft films, so that the middles of the two soft films are expanded outwards and deform, and a cavity with an opening in the top is formed; a preparation is filled into the cavity from the opening; the tops of the two soft films are connected in a sealing manner, and the opening is closed to seal the cavity. The soft films are expanded and formed by applying the acting force to the softened soft films, so that the volume, larger than that of a cavity formed in a natural state, of the cavity can be obtained, more medical solutions can be accommodated in the cavity, the volume of a film material in a unit area is increased to a certain extent, the utilization rate of the material is increased, and the production cost is reduced.

The invention discloses an anti-collision structure for an automobile. The anti-collision structure for the automobile comprises an anti-collision housing and a buffering structure, wherein the anti-collision housing is arranged in front of a front end shell of the automobile, and the buffering structure is arranged between the anti-collision housing and the front end shell; the buffering structure comprises two or more transversely arranged buffering units; arc end surfaces are arranged at one ends, facing the anti-collision housing, of the buffering units in the longitudinal direction; and the two adjacent buffering units are connected with each other in a clamped manner. According to the anti-collision structure for the automobile, the buffering structure is arranged between the anti-collision housing and the front end shell; on the one hand, the arc end surfaces are arranged at one ends, facing the anti-collision housing, of the buffering units in the longitudinal direction so thatthe buffering units can preferably bear forces; and on the other hand, the two adjacent transversely arranged buffering units are connected with each other in a clamped manner so that the buffering units are convenient to detach and can be updated in time if being partially damaged to avoid integral changing and reduce cost. On the whole, the good state is conveniently kept at any time to protectthe automobile body and a protection effect in collision is more optimal.