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.