37results about How to "Change dispersion" patented technology

The invention provides the nanometer zirconium dioxide particle, comprising 3-50% organic compound with silicon. The method comprises the following steps: putting the zircon salt in alkalinity condition, settling, getting nanometer zirconium dioxide, modifying nanometer zirconium dioxide with siliceous organic compound, adding surface active agent, and getting the product. The product has good oil wettability, and the particle size is 2-50nm. The product can be used in ceramic mold casting, filler, addition agent, catalyst and catalyst carrier.

The invention discloses a preparation method of a W-Cu continuous gradient composite material, which uses W powders of different particle sizes as raw materials, adds binders, dispersants, plasticizers, etc., mixes them through ball milling to obtain suspension slurry, and then settles and dries to obtain The green body is debinding and sintered to obtain a W skeleton with a continuous gradient distribution of pores, and then infiltrated with Cu at a certain temperature, and finally a W-Cu continuous gradient composite material with W and Cu components continuously changing along the cross section is obtained. The invention can realize the continuous change of W and Cu components along the cross section, and further realize the continuous change of material properties along the cross section; the raw materials used in the method of the invention are easy to obtain, the process flow is short, and the cost is low, which is suitable for large-scale production.

The invention discloses an optical fiber of a stimulated Brillouin scattering effect enhancement type, and the optical fiber comprises a fiber core and a wrapping layer surrounding the fiber core. The radius a of the fiber core is from 1 [mu]m to 7 [mu]m, and the fiber core is doped with one of GeO2, P2O, and Al2O3. The wrapping layer is doped with a material F. The relation between the refractive index difference delta n between the fiber core and the wrapping layer and the radius a of the fiber meets the conditions: a*a*delta n is greater than zero and not greater than 0120 [mu]m[2]. The relation between the sound speed difference delta V1 between the fiber core and the wrapping layer and the radius a of the fiber meets the conditions: a*a*delta V1 is greater than zero and not greater than 225 [mu]m[2]*m / s, so as to excite and generate single optical mode and single sound mode constraint stably in the optical fiber at the same time. The fiber core and the wrapping layer are respectively doped with different materials, thereby obtaining the common excitation of an acousto-optic field. A single brillouin gain peak is formed in the optical fiber through coupling. The position of the gain peak of a gain spectrum of the optical fiber is higher in gain coefficient, and the full width at half maximum of a brillouin gain spectrum is narrower and is about 10 MHz. Moreover, the optical fiber also can improve an absolute value of a chromatic dispersion parameter while enhancing the stimulated Brillouin scattering effect, and effectively inhibits an four-wave mixing effect nearby a normally-used working band window 1.55 [mu]m.

The invention discloses modified bio-char as well as a preparation method and an application thereof. The modified bio-char is obtained by impregnating acid modified bio-char with a micellar system, wherein the micellar system comprises an anionic biosurfactant, a cationic chemical surfactant and a humic acid solution. The preparation method comprises the following steps: (1) preparing bio-char; (2) preparing the acid modified bio-char; (3) preparing the micelle modified bio-char. The modified bio-char has the advantages of high adsorption capacity, high adsorption stability, good dispersibility in water and the like; the modified bio-char and a ferric salt flocculant are combined to be applied to removal of phenol from industrial wastewater, can realize integration of adsorption and flocculation, improve the flocculation effect of a water treatment agent, shorten time of a treatment process and reduce waste residues.

The invention provides an exhaust pipe for a vehicle. The exhaust pipe comprises a second pipe part, an inner pipe, a metal wire net, a baffle and a ring-shaped blocking piece, the inner pipe is arranged in the second pipe part, and the metal wire net is arranged between the inner wall of the tail end of the second pipe part and the inner pipe; and the baffle is arranged on the inner pipe in a sleeving mode and mounted on the end face of the tail end of the second pipe part, the left end face of the baffle is tightly attached to the metal wire net, the baffle is provided with a plurality of strip-shaped through holes, and the ring-shaped blocking piece is welded to the right end face of the baffle and shields the local parts of openings of the right ends of the strip-shaped through holes.According to the exhaust pipe for the vehicle, and due to the fact the structure is adopted, the silencing effect of the exhaust pipe is excellent.

The invention relates to a high stability polyvinyl chloride reconstituted emulsion and a preparation method thereof. The high stability polyvinyl chloride reconstituted emulsion comprises, by weight, 30-40kg of PVC pasty resin, 5-10kg of an emulsifier and 1-2kg of a dispersant. The suitable emulsifier and the dispersant are selected to design a high stability emulsifying system, and a temperature control and high dispersion high shearing machine is used to emulsify, so the dispersion performance of the pasty resin in the emulsion is changed, the problems of molecular coacervation and layering instability of emulsification reconstituted pasty resin are solved, and the application range of the above obtained product is widened; and the method is convenient and simple, the emulsion in any proportion can be prepared as needed, a technical bottleneck that solid resin cannot be used in some fields is broken, and the application range of the pasty resin is enlarged.