34results about How to "High particle purity" patented technology

The invention discloses a preparation method of a particulate self-assembling spherical zinc-cadmium-sulfur solid solution material. The preparation method comprises the following steps: weighing CMC,preparing a solution, and then sequentially performing stirring and ultrasonic treatment to form a mixed solution A; weighing zinc acetate dihydrate and cadmium acetate dihydrate, adding the zinc acetate dihydrate and cadmium acetate dihydrate into the mixed solution A, and then sequentially performing stirring and ultrasonic treatment to form a mixed solution B; weighing thioacetamide as a sulfur source, and adding the thioacetamide into the mixed solution B; then sequentially performing stirring and ultrasonic treatment to form a mixed solution C; acidifying the mixed solution C with a HClsolution, and performing ultrasonic treatment to form a mixed solution D; adding the mixed solution D into a polytetrafluoroethylene lining, and performing a hydrothermal reaction; and after the reaction is completed, respectively performing centrifugal washing on the product through deionized water and ethanol for multiple times, and then performing drying and grinding to obtain powder of the required material.

The invention discloses rare earth samarium zirconate nano material and a hydrothermal preparation method of the rare earth samarium zirconate nano material. The rare earth samarium zirconate nano material adopts nanoscale rare earth samarium zirconate powder formed by directly performing hydro-thermal synthesis on coprecipitated precursors. The rare earth samarium zirconate powder prepared through the method has a low thermal coefficient and a good thermal barrier effect, and belongs to potential photocatalytic semiconductor material. The method comprises the following steps: firstly, dissolving a zirconium source in deionized water, and then mixing the zirconium source with samarium source solution, secondly, adding prepared strong alkali solution in the mixed solution of the step one, sufficiently stirring to obtain precursor products, and performing centrifugalization to obtain solid precipitate, thirdly, dispersing the solid precipitate of the step two in deionized water, adjusting the PH value of solution, and adding slurry in a high-pressure reaction kettle to be reacted; and fourthly, taking out powder after the reaction, and washing the powder obtain pour phase samarium zirconate nano powder.

The invention relates to a preparation method of a carbon particle / manganese dioxide composite electrode material, and the invention relates to a preparation method of a composite electrode material. The invention aims to solve the problems of high internal resistance and poor charge-discharge cycle stability existing in the existing manganese dioxide electrode material. The method of the present invention: mix manganese sulfate, potassium permanganate and distilled water evenly, place the substrate in the mixed solution, perform hydrothermal reaction to obtain the manganese dioxide nanosheet material, and place the manganese dioxide nanosheet material in the plasma The enhanced chemical vapor deposition vacuum device is used for deposition to obtain the carbon particle / manganese dioxide composite electrode material. The invention is used for a preparation method of a carbon particle / manganese dioxide composite electrode material.

The invention provides a multifunctional nuclear shell structure drug carrier material and a preparation method thereof; the preparation method comprises the following steps: step one, adopting a solvent-thermal method for preparing monodispersed ferroferric oxide magnetic nanoparticles with grain diameter of about 60nm as ferromagnetic nuclear material of the nuclear shell structure; step two, adopting a sol-gel method for cladding an imporous silicon dioxide layer and a meso-porous layer outside ferromagnetic nucleus in sequence; step three, adopting the sol-gel method for loading a layer of up-conversion fluorescent material NaYF4: Yb, Er on the material obtained in the step two, wherein the molar concentration of Yb occupies 17% of Y concentration, and the molar concentration of Er occupies 3% of Y concentration. In the invention, an inertia SiO2 layer is designed between the magnetic nucleus and post-functionalized rare earth luminescent material for separating magnetic material from a rare earth luminescent layer so as to prevent fluorescent quenching; up-conversion fluorescent powder with higher fluorescent efficiency is used as fluorescent material; and the sol-gel method with mild reaction condition and uniform dispersion is adopted for forming the nuclear shell structure.