72results about How to "Improve dispersion characteristics" patented technology

Particulate materials useful as fillers, reinforcing agents, radioopacifiers, or impact modifiers. The particulate material has an average particle size range of about 10,000 nm or less and comprises an organic-inorganic hybrid material that has a ceramic material network having organic polymer segments distributed throughout the ceramic network. The ceramic network may be prepared by a sol-gel technique. The particulate material may be compounded in thermoplastic polymer compositions useful in a variety of applications such as preparation of medical device components.

An acoustic wave resonator comprising: a substrate with an air cavity; a first pair of low and high acoustic impedance layers formed on the substrate and located above the air cavity; a seed formed on the first pair of low and high acoustic impedance layers layer; a first electrode formed on the seed layer; a piezoelectric layer formed on the first electrode; a second electrode formed on the piezoelectric layer; a pair of second low and high acoustic impedance layers formed on the second electrode ; a passivation layer formed on the second pair of low and high acoustic impedance layers. The first low and high acoustic impedance layer pair includes a first high acoustic impedance layer positioned above the air cavity, and a first low acoustic impedance layer positioned between the first high acoustic impedance layer and the seed layer; second low and high acoustic impedance layers The impedance layer pair includes a second low acoustic impedance layer formed on the second electrode, and a second high acoustic impedance layer formed between the second low acoustic impedance layer and the passivation layer. The invention can improve the resistance of the acoustic wave resonator to environmental changes and self-aging, reduce the frequency correction sensitivity, and/or optimize the dispersion characteristics of the acoustic wave resonator.

The invention discloses a dome trapezoidal staggered double-gate slow wave structure, and belongs to the technical field of electric vacuum devices. The structure comprises two fluctuating parts whichare respectively arranged at the upper side and the lower side. Each fluctuating part is mainly composed of a plurality of trapezoidal parts, a circular groove part and a circular top part, wherein the plurality of trapezoidal parts are sequentially arranged at intervals in the transverse direction; the adjacent trapezoidal parts are in transition through the circular groove part; in the longitudinal section parallel to the transverse direction, the trapezoidal parts are isosceles trapezoids with the heights extending in the longitudinal direction, and the upper bottoms of the isosceles trapezoids at the upper side and the lower side are arranged on the sides, close to a strip-shaped electron beam channel, of the isosceles trapezoids, round top parts are connected to the upper bottoms ofthe isosceles trapezoids, and the lower bottoms of every two adjacent trapezoid parts in the transverse direction are in transition through a round groove part between the two trapezoid parts. According to the structure provided by the invention, the dispersion curve is more flat while the coupling impedance is increased, so that the defects of the existing sine wave guide slow wave structure areeffectively overcome.

The invention discloses highly filled white carbon black tread rubber having good electric and thermal conductivity and used for a pneumatic tire. The highly filled white carbon black tread rubber is prepared from, by weight, 60-80 parts of solution polymerized butadiene styrene rubber, 20-40 parts of butadiene rubber, 50-80 parts of white carbon black, 5-10 parts of carbon black, 8-12 parts of silane coupling agent, 3-12 parts of modified conductive composite material, 3-5 parts of resin, 2-4 parts of zinc oxide, 0.5-2.5 parts of stearic acid, 0.5-2.5 parts of sulfur, 0.5-1.8 parts of accelerant and 4-7 parts of other components. The highly filled white carbon black tread rubber uses the modified conductive material, meanwhile the packing ratio and a rubber mixing process are reasonably adjusted, on the basis that the original features of the rubber material are not changed, the electric and thermal conductivity of the rubber is remarkably improved, static electric shock or fire hazards and other potential safety hazards are avoided, the durability of the tire can be also improved, and the service life of the tire can be prolonged.

The present invention discloses a trapezoid-like staggered double-gate slow wave structure. On the basis of the staggered double-gate slow-wave structure, a trapezoidal gate is adopted at the bottom, a rectangular gate is adopted in the middle, and a circular electron beam channel is formed in the rectangular gate; the trapezoidal gate and the rectangular gate form trapezoidal-like gates, and the trapezoidal-like gates are sequentially arranged in a staggered mode in a longitudinal direction, namely a transmission direction. Tests show that the dispersion characteristic of the trapezoid-like staggered double-gate slow wave structure is improved, the broadband is wider, the high-frequency loss is greatly reduced; and meanwhile, the coupling impedance value is higher because the axial field components of the electron beam channel are more concentrated, which means that the interaction capability of an electron beam and an electromagnetic wave is increased, and further the output power, the gain and the interaction efficiency of a traveling wave tube are improved.

The invention discloses probiotic embedded particles prepared from the following raw materials: probiotic powder, whey protein concentrate, sodium caseinate, Plantago ovata seed powder, polyfructose,resistant dextrin and phospholipid. The invention also provides a method for preparing the probiotic embedded particles, which comprises the following steps: (1) by using probiotic powder as a core material, carrying out fluidized bed spray embedding by using whey protein concentrate, sodium caseinate, Plantago ovata seed powder and water to obtain protein colloid protective layers, and drying toobtain embedded substance A; and (2) carrying out fluidized bed spray embedding on the embedding material A with polyfructose, resistant dextrin, phospholipid and water to obtain polysaccharide protective layers, and drying to obtain the probiotic particles. The advantages are that the probiotic powder protected by the protein colloid protective layers and the polysaccharide protective layers areobtained, are provided with the characteristics of high acid resistance, high fluidity and high dispersion, can be preserved at room temperature, are stable in shelf life and are suitable for development and use of various products.

The invention belongs to the technical field of building materials, and particularly relates to a concrete retarder and a preparation method thereof. The concrete retarder is prepared from the following raw materials: 3-6 parts of modified microcrystalline cellulose, 1-3 parts of acrylic acid, 8-12 parts of modified glass fiber, 5-10 parts of borax, 6-10 parts of polyvinyl chloride resin, 2-4 parts of anhydrous sodium sulfate, 3-5 parts of quartz sand, 8-12 parts of sodium tripolyphosphate and 1-3 parts of carboxymethyl cellulose. The concrete retarder has good heat absorption property and heat dissipation property, and can absorb hydration heat produced by concrete; a good heat exchange effect is formed between the concrete and the external environment so that hydration heat energy generated in the concrete is dissipated; hydration of cement in the concrete is inhibited, and a strong retarding effect is achieved; meanwhile, the concrete retarder has good strength, and the influence onthe strength and the anti-scouring performance of the concrete is low.

The invention discloses a particle controllable preparation method and device based on an ultrasonic auxiliary continuous anti-solvent film dialysis process. A first sealed container of the device is connected with a first peristaltic pump. The first peristaltic pump is connected with a lower end connector of a film module shell pass. A fourth sealed container is connected with an upper end connector of the film module shell pass. A second sealed container is connected with a second peristaltic pump. The second peristaltic pump is connected with a lower end connector of a film module tube pass. Hollow fiber film bundles in a film module form a tubular structure, the tube pass of the film module is formed, and the space between the hollow fiber bundles and a film module shell forms the shell pass of the film module. By the adoption of the ultrasonic auxiliary continuous operation film module, the anti-solvent and solvent on the two sides of a film are controlled to penetrate towards the opposite sides correspondingly, raw materials are promoted to be separated out of a solution, and particle growth and dispersion are adjusted and controlled through dynamic dialysis and ultrasound enhancing, so that particles which are controllable in particle size, narrow in particle size distribution and good in dispersity are prepared efficiently, and the preparation method and device can be used for preparing various oral preparations or can be used for further processing of injections.

This invention relates to a flattop path-band WDM device realized by three points focusing including input waveguides, free propagation zone, diffraction grating and output waveguide in which the input and output waveguides are at a side of the free propagation zone and the diffraction grating is at the other side. There is a certain phase difference between different grating teeth to the sum of light path of input-output center points and three corresponding output centers are in the entire grating which distances of focusing points are determined by the desired path-band width, and three subgrating are staggeredly arranged and teeth number proportion is determined by the distance of focusing points.

The invention relates to a dye liquid special for preparation of high-resolution chromosome by karyotype analysis. The dye liquid is prepared by the following raw materials according to a proportion:1-3g of Giemsa dye power, 66-69ml of glycerinum, 66ml of methyl alcohol and 1-10 ml of dispersing agent. The dye particle is more refined and standard by grinding the dye particle, the dispersing characteristic of the dye particle is improved by addition of a dispersing agent, so that the uniformity and the clearness of dyeing are improved. By the novel dye liquid, the banding dyeing quality of the high-resolution chromosome is obviously improved, the banding belt dyeing effect of the high-resolution chromosome is clearer, the dyeing speed of human chromosome is rapid and controllable, and thebelt is clear. The dye liquid can be applied to large-scale clinic genetic laboratory.

Provided is a single-layer membrane loading type four-layer substrate micro-strip-micro-strip connecting structure. Low-reflection and low-loss transmission of microwave signals between layers in a four-layer medium substrate is achieved. The structure comprises four medium layers, a metal layer is arranged between every two medium layers, micro-strip wires are arranged on a first medium layer at the top layer and a fourth medium layer at the bottom layer, and the micro-strip wires are connected with signal through holes of the metal layers by penetrating through the medium layers vertically. Metal through hole columns are evenly distributed in the two sides of each micro-strip wire. Metal through holes are formed around the signal through holes according to a circular array in a distributing mode. The structure is characterized in that metal hole reverse welding discs are arranged at the positions where the signal through holes penetrate through the metal layers, the circular centers of the metal hole reverse welding discs are on the center lines of the signal through holes, and matched membranes are arranged on the signal through holes in the middle metal layer.

The invention is concerned with the slow wave structure based on the electromagnetism band gap structure, consists of: the electromagnetism band gap structure (-), the inputting channel (-), the outputting channel (-) and the electron infusing channel (-) that set on the electromagnetism band gap structure, the electron infusing channel (-) crosses the electromagnetism band gap structure. The invention is: uses the period structure characteristic of the electromagnetism band gap structure and combines the existing slow wave structure, forms the fit slow wave structure that uses the electromagnetism band gap structure, optimization the dispersion characteristics of the slow wave structure. It is: chooses the fit dispersion characteristics to produce the slow wave structure that is fit for different need.

The invention discloses a preparation method of an efficient and stable organic polymer solar cell. A TiO2 nanoparticle crystal layer, an electron transport layer, an organic active layer, a hole transmission layer and a top electrode are sequentially prepared on a transparent conductive electrode to obtain an inverted solar cell structure; and the inverted solar cell structure is subjected to standing treatment in an environment with certain humidity and an oxygen-containing gas. Through the method, the device efficiency can be significantly improved; the improvement amplitude can reach 1.5 times; the stability performance of the device is obviously improved; and the efficiency attenuation amplitude is smaller than 15% after the efficient and stable organic polymer solar cell is exposed in a high-humidity atmospheric environment for 1,000 hours; and the method is simple in technology, low in cost and suitable for large-scale production and application.

The invention relates to the technical field of electromagnetic waves, and discloses a novel double-electron-beam-channel folded waveguide slow-wave structure. The structure comprises a folded waveguide, wherein an upper grid and a lower grid are arranged on the folded waveguide, a bent grid section of the upper grid is moved upwards or a bent grid section of the lower grid is moved downwards so as to allow the distance, perpendicular to a period direction, between the upper grid and the lower grid to be increased, a first cylindrical electron beam channel is arranged in the period direction and penetrates through the upper grid, the first electron beam channel is tangent to the top of the bent grid section of the lower grid, a second cylindrical electron beam channel is arranged in the period direction and penetrates through the lower grid, and the second electron beam channel is tangent to the bottom of the bent grid section of the upper grid. By increasing the distance between the upper grid and the lower grid, the radius of an original single electron beam channel is changed into a double electron beam channel which is established along the periodic direction and penetrates through the folded waveguide, so coupling impedance is effectively improved and loss is reduced under the condition that good dispersion characteristics are ensured.

A Niuzhangzhi essential oil inhalant is characterized by comprising Antrodia camphorate essential oil and one or multiple of auxiliaries suitable for inhalation; the Antrodia camphorate essential oil is composed of Antrodia cinnamomea extract, ethyl alcohol and soybean lecithin according to a weight ratio of 1:(15-25):(2-3); the Antrodia cinnamomea essential oil accounts for 1% to 10% of the inhalant by weight percentage.