7results about How to "Improve erosion ability" patented technology

The invention discloses a sintering method of an aluminum oxide electrostatic chuck, and belongs to the technical field of electrostatic chucks, and the sintering method comprises the following steps: S1, preparing an insulating layer substrate from raw materials and a multilayer structure, depositing an electrode layer on the insulating layer substrate, coating the electrode layer with aluminum oxide nano powder to form a dielectric layer, and spraying a silicon carbide coating on the surface of the dielectric layer to form the multilayer structure; s2, primary sintering is conducted, specifically, the multi-layer structure is placed in a vacuum sintering furnace to be subjected to primary sintering; s3, secondary sintering is conducted, specifically, the multi-layer structure obtained after primary sintering is subjected to secondary sintering through the pulse discharge plasma sintering technology, and cooling is conducted after secondary sintering; s4, the heat-conducting glue is attached to and integrated with the cooling base, the bottom of the insulation layer base body obtained after secondary sintering of the multi-layer structure is coated with the heat-conducting glue, the insulation layer base body and the cooling base are pressed, the electrostatic chuck is manufactured, and plasma cleaning is conducted on the surface of the electrostatic chuck; and S5, performing performance optimization treatment, namely performing high-voltage corona treatment on the electrostatic chuck.

The invention discloses portland cement clinker based on marlstone and a preparation method thereof, and relates to the technical field of cement. The method comprises the following steps: crushing, grinding and drying natural marlstone, spraying and activating by using a mixed steeping liquor containing sodium hydroxide, lanthanum nitrate and cerous nitrate, and drying and roasting at low temperature to obtain modified marlstone powder; mixing the powder with calcium carbonate, quartz powder, ferric oxide, dihydrate gypsum, calcium fluoride and barium carbonate, and pressing into a green body; and finally, sequentially carrying out two-stage mineralization calcination on the green body, introducing oxygen-enriched air in a heat preservation stage, continuously calcining, and cooling to obtain the cement clinker. According to the invention, marlstone is used as a main raw material, and the obtained cement clinker has excellent sulfate corrosion resistance through dipping activation and multi-stage calcination processes.

This invention relates to a method for preparing and applying a polypyrrole-coated indium-based electrocatalyst. The method includes the following steps: adding carbon nanotubes to an N,N-dimethylformamide solution containing indium nitrate, transferring the solution to a high-temperature reactor, and reacting to obtain In₂O₃ / CNT; placing the In₂O₃ / CNT in an aqueous solution containing pyrrole, and then adding ammonium persulfate to react, thereby obtaining the polypyrrole-coated indium-based electrocatalyst. The polypyrrole-coated indium-based electrocatalyst obtained by this invention exhibits excellent electrocatalytic performance in the reduction of carbon dioxide to formic acid, possessing both high Faradaic efficiency and long-term catalytic stability.

The utility model discloses an immersion type water gap with high structural strength, which comprises a water gap body and a framework mechanism, wherein the water gap body is composed of a bowl section, a transition section and a slag line section; the bowl section is fixedly connected to the top of the transition section; the slag line section is fixedly connected to the bottom of the transition section; the framework mechanism is embedded in the bowl section, the transition section and the slag line section; the framework mechanism is composed of reinforcing rings and reinforcing ribs; the number of the reinforcing rings and the reinforcing ribs is multiple; the reinforcing rings are arranged in a linear array from top to bottom.

The utility model discloses a kind of glass electric melting furnace composite heat preservation structures, including glass electric melting furnace main body, the glass electric melting furnace main body is sequentially arranged from inside to outside working layer, transition layer, heat insulation layer and outer protective layer composition;The working layer is made of electric melting zirconia corundum brick, the transition layer is made of light mullite brick, the heat insulation layer is made of microporous heat insulation plate and ceramic fiber module, the ceramic fiber module covers in microporous heat insulation plate outside, the outer protective layer is made of galvanized steel sheet, by galvanized steel sheet play to the effect of moisture-proof and corrosion-proof, the ceramic fiber module is fixed in the inner side of outer protective layer by stainless steel anchor, air passage is arranged between the outer protective layer and heat insulation layer.The utility model effectively reduces the temperature of glass electric melting furnace main body surface, and reduces heat loss, realizes the integrated effect of heat insulation, heat preservation and sealing.

A method for synergistically preparing green Portland cement clinker by utilizing multi-element solid waste comprises the following steps: (1) obtaining raw materials of limestone, silica, phosphorite beneficiation powder, copper tailings, ferroalloy slag and coal-fired slag, burdening according to silicate, and mixing and grinding to obtain a raw material; (2) preheating the obtained raw material by a preheater, and then feeding the raw material into a decomposing furnace for decomposing; (3) calcining in a rotary kiln after decomposition to obtain green Portland cement clinker; the method has the beneficial effects that 1, the copper tailings are doped, so that the burnability of the raw material is improved, and the cost of the raw material is reduced; 2, the content of f-CaO in the clinker can be reduced, the compressive strength, compactness, water resistance and stability of the clinker can be improved, the quality of the clinker is improved, and the coal consumption of clinker sintering is reduced; thirdly, after the copper tailings are used for replacing a part of ferroalloy slag, the content of water-soluble hexavalent chromium in the cement is reduced; and 4, by doping the coal-fired slag, the grindability of the raw material can be improved, the quality of the clinker is improved, the coal consumption of clinker sintering is reduced, and the cost is reduced.

This invention discloses an integrated mullite / rare earth silicate environmental barrier coating, its preparation method, and its application, belonging to the field of coating preparation technology. The environmental barrier coating is deposited on a C / C composite substrate, and from the surface of the C / C composite substrate outwards, consists of a SiC bonding layer, a mullite intermediate layer, and a rare earth silicate composite surface layer; the rare earth silicate composite surface layer is RE2SiO5-RE2Si2O7-RE3Al5O 12 RE can be Yb, Y, or Lu. The mullite intermediate layer and rare earth silicate composite surface layer are prepared by mixing SiC oxide powder with Al2O3 powder and RE2SiO5 powder with Al2O3 powder, respectively, into two slurries. These slurries are then applied layer by layer to the surface of the SiC bonding layer and dried, followed by in-situ heat treatment to form the composite layer. An in-situ reaction at the interface between the mullite intermediate layer and the rare earth silicate composite surface layer creates a component transition zone, exhibiting a multiphase structure where rare earth dual silicate phases are dispersed within the mullite framework. This environmental barrier coating addresses the technical problem of weak interlayer bonding and easy cracking during thermal cycling in existing coatings.