43results about How to "Unified appearance" patented technology

The invention discloses a method for preparing magnesium hydrate through ammonia spray method. The method comprises the following steps: by using caustic calcined magnesite and ammonium salt as raw materials, carrying out ammonia stilling reaction to obtain an ammonium and magnesium salt solution, wherein the ammonium and magnesium salt are contacted in a spray type reactor and magnesium hydrate precipitation reaction is performed, aging product mother liquor for a proper time, filtering, returning filtrate containing ammonium salt to an ammonia stilling system, washing and drying filter cake to obtain magnesium hydrate product with uniform particle shape and good dispersion state. The process disclosed by the invention is used for preparing magnesium hydrate through one-step reaction, is simple in operation step, mild in reaction condition, uniform in product particle shape, and the particle shape can be regulated by changing the reaction condition. The ammonium slat is circulated with the ammonia in the reaction process, the production cost is low, the pollution is less, and the scale production is realized, the product can be used as production raw material of high-pure magnesium oxide and inflaming retarding additive of polymer material.

The invention discloses a preparing method for controllably synthesizing monodisperse active metal nanoparticles through lasers. The method comprises the steps that pure-metal target materials serve as raw materials, the processed target materials are placed into a laser radiating device, the laser radiating device is inflated with argon, cyclohexane and oleic acid are added into the laser radiating device, and then the volume solubility of the oleic acid is larger than 0.05 percent but smaller than 0.12 percent; the target materials are ablated through a nanosecond focus pulse laser to prepare a pure-metal nanometer colloid solution; the colloid solution is transferred to the other laser radiating device, and the volume concentration of the oleic acid in the cyclohexane is adjusted to range from 0.14 percent to 0.17 percent; a nanosecond parallel pulse laser is utilized for irradiating the metal nanometer colloid solution to prepare the monodisperse active metal nanoparticles with the diameter ranging from 5 nm to 20 nm. According to the preparing method, the active metal nanoparticles uniformed in appearance under the normal-temperature and normal-pressure liquid phase condition are controllably synthesized, and the size distribution of the active nanometer particles is smaller than 10 percent. The method is simple in technology, convenient to operate, free of by-products and impurities and suitable for synthesizing most active metal nanometer particles, and is an environmental-friendly synthesizing technology.

The invention discloses a plastic product as well as a preparation method and a piece of refrigeration equipment thereof. The preparation method for the plastic product comprises the following steps that a plastic base stock and a surface layer base stock are molded in a co-extrusion way, so that the plastic base stock forms a body, and the surface layer base stock forms a surface layer, wherein the surfer layer is formed in at least a part of surface of the body. The plastic product is prepared by the method for preparing the plastic product, common formation of the body and the surface layer can be effectively realized, so that the technical problems of inconsistent product appearance, large color difference, low product percent of pass, low surface strength and easiness in scratches in the current preparation technology are solved successfully; and in addition, the preparation process is simple, the production cycle is short and the environment cannot be polluted.

The invention discloses a preparation method of a floriform Ag@AgBr / ZnO photocatalytic material and belongs to the field of nano material preparation. The method comprises the following steps: 1, preparing a surfactant with a certain concentration and a Zn source to serve as a Zn source solution and preparing hexamethylenetetramine with a certain concentration and an Ag source to serve as an Ag source solution; 2, adding an oxidizing agent into the Ag source solution, and dropwise adding the Ag source solution into the Zn source solution at a certain rate; 3, transferring the mixed solution toa high-pressure reaction kettle, and executing hydrothermal reaction at a certain temperature and a certain time; 4, washing the product with water and alcohol and drying the product, calcining it inair, and cooling it to room temperature to obtain the floriform Ag@AgBr / ZnO photocatalytic material. The synthetic method adopted by the invention has the advantages of simple flow, simple and convenient operation and no secondary pollution. The synthesized photocatalytic material has the advantages of uniform morphology, excellent performance and the like. The preparation method belongs to the field of photocatalytic materials.

The present invention relates to a method for growth of germanium quantum dots. In the method, germanium quantum dots are grown on graphene interfaces with different quantities of layers. In the present invention, ultra-high uniformity graphene interfaces are introduced on a conventional substrate surface, Ge quantum dots are grown on the interfaces, and complicated cleaning processes for obtaining high-quality interfaces are avoided, and process flows are simplified; in addition, the low-matrix element content and the low defect rate of the germanium quantum dots are ensured, a self-organization growth process of the germanium quantum dots is ensured, and germanium quantum dots with good shape and uniformity are formed.

The invention provides a circle-to-square gradual-change tube of a turbulence generator. The circle-to-square gradual-change tube comprises a circular tube section, a transitional tube section and a polygonal tube section; the transitional tube section is connected with the circular tube section and polygonal tube sections which are respectively located at two sides; the section of the circular tube section is a circle, the section of the polygonal tube section is a polygon, and the section of the transitional tube section gradually varies from a polygon to a circle in a direction from the polygonal tube section to the circular tube section; the circular tube section, the transitional tube section and the polygonal tube section are of an integrally connected structure, wherein the polygonal tube section comprises, but is not limited to, a quadrangle, a pentagon and a hexagon. The circle-to-square gradual-change tube is prepared by using a hydraulic pipe contracting machine and at leasttwo sets of rolling pressing wheels. The size and the appearance of the circular-variable square tube are controlled by equipment, the size is uniform, simplicity and groups of rollers, and the sizeand appearance of the circular-variable square tube is controlled by equipment. The size is uniform, convenience and high efficiency are achieved, and the appearance is attractive. The diameter changing place is connected through the transitional section in a gradual-change mode, so that generation of vortex of a slurry flow is reduced, the uniformity degree of the slurry flow is improved, and theservice life is prolonged. The equipment has a simple structure, manufacturing is convenient, mass production can be realized, and cost is saved.

The invention discloses a zinc oxide micron wall material and a preparation method thereof. A method for obtaining a zinc oxide micron wall on a silica-based gallium nitride substrate with cracks by the low-temperature water bathing method includes utilizing zinc acetate, hexamine and deionized water as raw materials and silica-based gallium nitride with cracks as a substrate, inducing the zinc oxide to preferentially form a core via the cracks and forming the zinc oxide micron wall in self-assembly manner. The method is simple in reaction conditions, and the zinc oxide micron wall grown is large in specific surface area, high in length diameter ratio and purity and controllable in height. The low-temperature preparation of the large-area zinc oxide micron wall controllable in growth is realized. The large-area zinc oxide micron wall can be hopefully and importantly applied in the fields of microelectronics, microelectronic photoelectric devices and sensors. The preparation method has no special requirements for heating environment, is simple and easily controllable to operate, high in repeatability and suitable for industrialized production, and raw materials are easy to obtain and low in cost.

The invention discloses a preparation and modification method of a magnesium hydroxide flame retardant. The technical steps comprise micro-emulsion blending, magnesium hydroxide synthesis, coating modification, washing separation and drying. The preparation method comprises the following steps: preparing an W / O type microemulsion by using an oil phase containing a polymer monomer, a surfactant, asoluble magnesium salt and a cosurfactant, adding an alkaline precipitant under stirring for a precipitation reaction, performing aging after the reaction, performing centrifugal separation on the obtained mixed solution, separately washing the obtained precipitate after the centrifugal separation with ethanol and distilled water, and finally performing drying to obtain the magnesium hydroxide. According to the method, the ''water core'' of the microemulsion is used as a magnesium hydroxide reactor, the polymer monomer in the microemulsion oil phase is used as a coating modifying matrix, and the preparation and the modification of magnesium hydroxide are synchronously realized. The operation is simple; the obtained magnesium hydroxide has a nano partical size, and is uniformly dispersed; the surface is oleophylic; and the magnesium hydroxide flame retardant has good application potential.