3 results about "Sphericity" patented technology

The invention relates to a low-density high-intensity ceramsite fracturing propping agent and a preparation method thereof. The low-density high-intensity ceramsite fracturing propping agent has a core material body which is composed of the following materials in percentage by weight: 30-40% of bauxite, 10-15% of talcum, 10-12 % of mullite, 12-15% of metakaolin, 6-15% of potassium feldspar, 3-6.5% of titanium dioxide, 1-3% of manganese powder, 3-4.5% of nano calcium carbonate, 2.5-3.5% of iron trioxide and 2.5-3.5% of magnesium orthosilicate; a gel breaker layer is arranged outside the core material body, and the gel breaker layer is sequentially coated with an external coating and a lubricant layer. When in preparation, various materials are firstly ball-milled, sieved and graded, and then matched in different ways; the potassium feldspar and the titanium dioxide both can reduce reaction temperature to a certain extent; the added manganese powder mainly plays a role in catalyzing; the nano calcium carbonate plays a role in reducing density of product; sintering temperature needed by the product is 1250 DEG C; the product is low in density, strong in anti-fracture capacity and high in sphericity; and meanwhile, the production technology is simple and easy to popularize and implement.

The invention relates to a composite microsphere with a radial fibrous mesoporous shell layer/hollow nuclear layer structure and a preparation method of the composite microsphere. The composite microsphere is provided with a cavity, a nuclear layer and a mesoporous shell layer, wherein the mesoporous shell layer is provided with radial fibrous mesoporous channels. The composite microsphere is highin sphericity and surface regularity, uniform in particle size distribution and high in monodispersity and strength. The preparation method of the composite microsphere is simple and feasible and facilitates industrialization; preparation of the radial fibrous mesoporous shell layer and removal of an organic template can be completed by means of a one-step method. The composite microsphere has the advantages of high light scattering efficiency, large specific surface area, low density, high porosity and the like, can be widely applied in light diffusion materials and used as a light diffusionagent for heavy haze and can also be adopted in the fields of fillers of coatings, cosmetics, catalysts and water treatment.

The invention discloses a spray method for preparing oxidation-resisting phosphorous copper alloy powder. The spray method is characterized in that the oxidation-resisting phosphorous copper alloy powder is prepared by the following components: 500 parts of raw copper powder, 25-30 parts of tin power, 8-10 parts of phosphorus powder, 3-7 parts of benzotriazole, 3-7 parts of benzene sulfonic acid sodium salt and 6-8 parts of glycerol. By smelting the raw materials through intermediate frequency smelting equipment and adjusting the contents of copper, tin and phosphorus, the product lead-free effect is realized, and the oxidation-resisting phosphorous copper alloy powder is prepared by the spray method. The prepared oxidation-resisting phosphorous copper alloy powder has the characteristics of good sphericity, component uniformity, good moldability, excellent sinterability and low surface oxidation. The spray method is low in production cost, high in production efficiency and stable in product quality.