41results about How to "Small density difference" patented technology

The invention relates to multi-column sectional drive combined type domestic incinerator. It is set three fire-grates that drying section, burning section, and firing section. The middle fire grate is connected between them. There is altitude fall between them that the drying section is the highest point; the firing one is the lowest point. The primary air chamber is respectively set under them. The incinerator fire grate system of the invention has independent drive mechanism, air supply system, and air chamber for each section which is convenient for controlling technical parameter that traveling speed, air quantity, air temperature, air pressure etc to realize full drying and burning for whole garbage layer.

A hybrid calibration method uses an calibration phantom (exterior reference) scanned simultaneously with the patient, and one or more known tissues of the subject (interior reference) to create a hybrid calibration reference that improves the measurement of tissue densities throughout the body. In addition, the calibration method is used to quantitatively define boundaries of tissue and organs for more accurate measurements of lengths, areas and volumes. Another aspect of the invention uses the calibrated images to quantitatively preset absolute window/levels for filming and image display, which provides standardized viewing for diagnostic purposes.

The invention relates to composite high-viscosity modified asphalt and a preparation method thereof. The raw material comprises the following components by weight percent: 84-88% of heavy duty bitumen and 12-16% of modified compounds. The method comprises the following steps: mixing SBS, desulfurized colloidal particles and a compatilizer containing an epoxy group to prepare a modified compound; preparing modified particles after mechanically pelletizing; adding the modified particles to asphalt at 170-190 DEG C; melting and refining compound particles after shearing at a high speed for 30-60 minutes on a high-speed mixing emulsifier; transferring the sheared asphalt to a high-speed disperser, and agitating to obtain the composite high-viscosity modified asphalt. The composite high-viscosity modified asphalt prepared by using the method has the characteristics of stable heat storage, and excellent high and low temperature properties, has good economic benefits and environmental effects because of use of waste rubber, and is free of sulphur as a stabilizer, the construction viscosity can be reduced, the construction environment can be improved, and the problem that incompatible asphalt is difficult to stabilize is solved.

An aluminum oxide sintered body contains aluminum oxide in an amount of not less than 99% by weight and at least one selected from magnesium oxide, calcium oxide and silicon oxide, and contains phosphorus of not more than 0.0025 parts by weight to 100 parts by weight of the aluminum oxide sintered body. This avoids that phosphorous exerts adverse effect on the sintering properties of an aluminum oxide sintered body, especially the sintering properties of a large aluminum oxide sintered body, causing the sintered body to lack uniformity between the sintered body inner portions and outer portions. Therefore, this aluminum oxide sintered body is suitably used in semiconductor manufacturing apparatus members or liquid crystal manufacturing apparatus members.

The invention relates to an exposure method, which includes: providing a to-be-exposed pattern having several figures with two different spacings; providing a pseudo auxiliary pattern, which includes a certain number of auxiliary figures, with adjacent auxiliary figures having a same spacing; acquiring the width of the auxiliary figures and the spacing of adjacent auxiliary figures; when the spacing of the adjacent figures is greater than or equal to a critical size, determining the area between the adjacent figures as a fill area, with the figures at the edge of fill area being isolate figures; filling the fill area of the to-be-exposed pattern with the auxiliary pattern to form a pseudo to-be-exposed figure; and making a first figure and a second figure form according to the pseudo to-be-exposed figure, and taking the first figure and the second figure as two sets of mask figures of dual graphical exposure respectively. The exposure method provided by the invention can improve the accuracy of etching figures.

The invention discloses a forming method and a forming device for a powder metallurgy part. The method comprises the steps of: first pressing, final pressing, mold stripping and sintering, the formingdevice comprises an upper plunger, a female die and a lower plunger, the female die is provided with a female die cavity for containing powder, the upper plunger comprises an upper die holder and anupper die stamping piece, the lower plunger comprises a lower die holder and a lower die stamping piece, and the upper die stamping piece and the lower die stamping piece can penetrate into the femaledie cavity to press the powder. A powder part processed by the method and the device has good compactness, the initial density in the middle is increased effectively, the overall density is increased, the relative density difference value is reduced, and the overall green body performance is improved.

The invention discloses a manganese zinc ferrite magnetic core. The bottom of the magnetic core is square, the joint of the bottom surface and side wall of the magnetic core is designed as a chamfer, the bottom surface of the magnetic core is provided with a groove, the joint of the groove and the bottom surface is designed as a chamfer, and a bulge is formed at the outer edge along the groove of the bottom surface. The groove is arranged on the bottom surface of the magnetic core, the bulge is formed at the chamfer, a friction force between the magnetic core and a setter plate is reduced when the magnetic core is sintered, and resistance received by contraction of the magnetic core when the magnetic core is sintered is reduced, so that the density difference of the magnetic core caused by a big chamfer is reduced, and product deformation is reduced. A contact surface between the magnetic core and the setter plate is small when the magnetic core is sintered, so that zinc volatilization caused by contact between the magnetic core and the setter plate is reduced, less cavities are produced inside the magnetic core as zinc on the surface of the magnetic core is volatilized, and the mechanical strength of the magnetic core is enhanced.

The invention discloses an inert matrix dispersion fuel pellet and a preparation method thereof. The preparation method includes: S1, prefabricating a fuel-free area, specifically, pressing SiC mixedpowder into a tubular shape or a disc shape, and performing pressureless sintering; S2, prefabricating a fuel area, specifically pressing TRISO (tri-structural iso-tropic) particles with SiC coatingsinto a cylindrical shape; S3, filling the cylindrical-shaped materials into the tubular-shaped materials, then placing the disc-shaped materials at the opposite both ends of the tubular-shaped materials, performing discharge plasma sintering to obtain the inert matrix dispersion fuel pellet, wherein the cylindrical-shaped materials form the fuel area of the inert matrix dispersion fuel pellet, andthe tubular-shaped materials and the disc-shaped materials form the fuel-free area of the inert matrix dispersion fuel pellet. According to the preparation method of the inert matrix dispersion fuelpellet, by prefabricating the fuel-free area, the density of the fuel-free area is controlled to be close to that the pressed fuel area, the density difference between the fuel area and the fuel-freearea of the sintered inert matrix dispersion fuel pellet can be reduced, the peripheral contour structure of TRISO particles inside the fuel area can be improved, the fuel area can be expanded, the overall TRISO volume content of the inert matrix dispersion fuel pellet can be increased, and the comprehensive performance of the inert matrix dispersion fuel pellet can be further enhanced.

The invention relates to the technical field of medical liquid parts and provides a buoyancy type non-returning transfusion device. The buoyancy type non-returning transfusion device comprises a non-returning shell and a floater, wherein a liquid inlet channel and a liquid storage cavity are arranged in the non-returning shell; the upper part of the liquid inlet channel is provided with a liquid inlet formed in the non-returning shell; a communication channel is arranged between the liquid inlet channel and the liquid storage cavity; a liquid outlet is formed in the bottom of the liquid storage cavity; the floater, which can float up when the liquid level height of medicine liquid exceeds the lowest limitation and block the liquid outlet when the liquid level height of the medicine liquid is lower than the lowest limitation, is arranged in the liquid storage cavity above the liquid outlet in a sleeving manner. According to the buoyancy type non-returning transfusion device, the liquid inlet channel and the liquid storage cavity are separately arranged and the acting force on the floater by liquid drops can be effectively eliminated; the restriction of a liquid dropping to a gap between the floater and the liquid storage cavity, and a medicine liquid dropping flow channel and the flow speed can also be effectively eliminated; the non-returning effect is good and the manpower is freed; patients or accompanying people do not need to observe liquid dropping conditions all the time; the adaptability of adopting the buoyancy to control the rising and falling of the floater is strong, the utilization requirements of a plurality of types of medicine liquid can be met and the popularization is convenient.

In a vapor-compression refrigerant cycle having an ejector, a mixture refrigerant of a first refrigerant and a second refrigerant is used. When the mixture refrigerant is decompressed and expanded in a nozzle of the ejector, the first refrigerant has an adiabatic heat drop that is larger than that of the second refrigerant. Further, the second refrigerant has an evaporation latent heat that is larger than that of the first refrigerant. In a gas-liquid separator, a gas-phase amount of the first refrigerant is made larger than that of the second refrigerant, and a liquid-phase amount of the second refrigerant is made larger than that of the first refrigerant. For example, the first refrigerant is propane, and the second refrigerant is butane. Accordingly, expansion energy recovered in the nozzle can be effectively converted to pressure energy in a pressure increasing portion of the ejector while cooling capacity of an evaporator can be improved.

The invention discloses a molybdenum-tungsten sputtering target material and a preparation method thereof. The relative density of the molybdenum-tungsten sputtering target material is 99.0-99.5%, andthe oxygen content is 350-600 ppm. The molybdenum-tungsten sputtering target material is prepared from the following raw materials in percentage by weight: 15-20wt% of tungsten trioxide powder with the purity of at least 4N, and the balance of molybdenum powder with the purity of at least 3N, wherein the particle size of the tungsten trioxide powder is 7-10 mum, and the particle size of the molybdenum powder is 4.5-6.5 mum. The molybdenum-tungsten sputtering target material is suitable for preparing a flat panel display, and has the advantages of uniform structure, no holes and low oxygen content.

The invention discloses a preparation method of a feed for metal injection molding, the feed and a metal part. The preparation method of the feed for metal injection molding comprises the following steps that raw materials are provided and divided into two parts; one part of the raw materials is heated to form a first molten mixture, and after sufficient stirring and banburying, first-time extrusion granulation is conducted to obtain a semi-finished product; and the other part of the raw materials is heated to form a second molten mixture, after sufficient stirring and banburying, the semi-finished product is added into the second molten mixture, and after sufficient stirring and banburying are conducted again, second-time extrusion granulation is conducted to obtain the feed. According to the preparation method of the feed for metal injection molding, the semi-finished product with the small particle size is prepared through first-time extrusion granulation, then the semi-finished product and the second molten mixture are mixed to form the raw materials of the feed, due to participation of the semi-finished product, the density difference of the raw materials of the feed is reduced, particle size distribution of the raw materials of the feed is enriched, and thus the mixing uniformity of the raw materials of the feed is improved.

The invention provides a gas saving, emission reducing and efficiency improving system for industrial gas furnace and kiln. The system comprises a carrier introduction system, a homopolar resonance treatment system, a methanation reaction system, a water gas reaction system and a deposited carbon pulverization removing and combusting system; a liquid carrier is taken by a gas fuel; the fuel taking the liquid carrier passes through each subsystem; the carbon chain structure of the fuel is changed by adopting a homopolar resonance technology; meanwhile, methanation reaction and water gas reaction are generated by carrier catalysis to form chained type combustion enhancement, and the combustion efficiency of the fuel is improved, so the amount of used fuel is reduced; meanwhile, the gas saving, emission reducing and efficiency improving system for the industrial gas furnace and kiln is capable of implementing synergic emission reduction of various pollutants by a selective tail end reduction reaction. The treatment system provided by the invention has the advantages of saving energy and reducing emission.

The invention discloses a display device. The display device comprises: a display function layer which comprises a thin film transistor array and a light-emitting device layer located at one side of the thin film transistor array; a light sensing device arranged on the side, away from the light-emitting device layer, of the thin film transistor array and located in a fingerprint recognition area;and an optical collimation structure layer arranged between the light sensing device and the display function layer, wherein the optical collimation structure layer comprises an optical collimation structure, the optical collimation structure is arranged in the fingerprint recognition area, the optical collimation structure corresponds to the light sensing device in the thickness direction of thedisplay device, and the surface of the side, close to the display function layer, of the optical collimation structure comprises a micro-nano structure array. According to the display device providedby the embodiment of the invention, the intensity of the irradiated light of each thin film transistor channel in the display function layer is relatively consistent, the performance of the thin filmtransistors can be relatively consistent, the brightness of the light emitting device can be relatively consistent, and the display uniformity of the display panel is further improved.

The invention discloses a preparation method of an antibacterial plate for tableware, belongs to the technical field of metal rolling, and solves the problem that coating stainless steel and antibacterial heat treatment stainless steel in food contact materials in the prior art generate harmful substances to human bodies. The preparation method comprises the steps that S1, metal titanium with the granular mass fraction being 97% and metal copper with the granular mass fraction being 3% are mixed, and a mixture is obtained; S2, a non-self-consumption vacuum arc melting furnace is adopted for smelting the mixture into an alloy cast ingot, in the vacuum melting process, electromagnetic stirring is adopted for assisting production, heat preservation is conducted for 3-6 h, and then annealing cooling is conducted; S3, the annealed and cooled cast ingot is heated, and two-pass hot rolling is carried out to form a plate; S4, cold rolling and annealing are carried out: firstly removing an oxidation film on the surface of a hot-rolled plate, and performing cold rolling and annealing treatment on the hot-rolled plate for multiple times; S5, solution treatment is carried out; and S6, aging treatment is carried out on the cold-rolled sheet subjected to solution treatment. The alloy plate is smaller in grain size, the tensile strength, the ductility and other mechanical properties are obviously improved, and meanwhile the good antibacterial property is achieved.

The invention discloses an oil well cement suspended polymer retarder, a preparation method and an oil well cement slurry system. The oil well cement suspended polymer retarder consists of the following components: 2-acrylamide-2-methylpropanesulfonic acid, Itaconic acid, isopropanol, high-viscosity carboxymethylcellulose sodium salt (HV-CMC) for drilling fluid, 40 wt% sodium hydroxide aqueous solution, deionized water, sodium persulfate and sodium sulfite. The oil well cement slurry system is composed of basic formula cement slurry and oil well cement suspension polymer retarder. The basic formula cement slurry is composed of the following components: G grade high sulfate-resistant oil well cement 600 parts by weight + quartz sand 210 parts by weight + 42 parts by weight of G310 + 24 parts by weight of oil well cement polymer retarder + 312 parts by weight of tap water. The oil well cement suspension type polymer retarder of the present invention has the characteristics of suspension and has a wide range of applications; it can ensure the stability of the cement slurry, ensure that the cement stone has a small density difference between the upper and lower parts during the solidification process, and has good strength consistency, ensuring Cementing quality.