43 results about "Chromium(III) oxide" patented technology

The invention provides near-infrared adjustable double-perovskite type mechanoluminescence fluorescent powder as well as a preparation method and application of the near-infrared adjustable double-perovskite type mechanoluminescence fluorescent powder. The expression general formula of the double perovskite type mechanoluminescence fluorescent powder is Sr2M1-xSbO6: xCr < 3 + >, wherein M is Al, Ga, Sc, In or Y; x is equal to 1%-7%. The preparation process of the fluorescent powder comprises the following steps: a, weighing strontium carbonate, an oxide of M, antimony pentoxide and chromium sesquioxide according to the element proportion in the chemical general formula Sr2M1-xSbO6: xCr < 3 + >; b, mixing the weighed raw materials, and uniformly grinding to obtain a mixture; and c, carrying out high-temperature calcination on the obtained mixture to obtain the near-infrared adjustable double perovskite type mechanoluminescence fluorescent powder. By regulating and controlling the components of the substrate, the emission main peak can be adjusted from 780nm to 946nm. The fluorescent powder provided by the invention can show a self-recovery near-infrared stress luminescence characteristic without pre-irradiation under continuous stress stimulation, is simple to prepare and convenient for industrial batch production, and has a wide application prospect.

The invention relates to the technical field of dyes, in particular to an acid black dye with green light and a preparation method thereof.The preparation method comprises the steps that a front color base I and a front color base II are synthesized firstly, then the front color base I and chromic oxide are complexed to obtain a reaction solution I, then the front color base II is added into the reaction solution I, and the acid black dye with the green light is prepared. The preparation method is simple and environment-friendly, a dye compound A, a dye compound B, a dye compound C and a dye compound D are formed by complexing a front color base I, a front color base II and chromium ions, and then the adding amount proportion of the front color base I, the front color base II and the chromium ions is adjusted; the ratio of the dye compound A to the dye compound B to the dye compound C to the dye compound D is adjusted, the green and full acid black dye is prepared, and the obtained acid black dye with green light is excellent in color fastness.

This invention provides a high-entropy alloy nano-coating high-temperature oxidation-resistant modification preparation process, belonging to the field of coating modification technology. The high-entropy alloy nano-coating high-temperature oxidation-resistant modification preparation process specifically includes the following steps: S1. Target material selection and preparation; S2. Alloy substrate treatment; S3. Low-temperature nanocrystalline coating deposition; S4. Coating densification treatment; S5. Low-temperature recovery annealing; S6. Pre-oxidation treatment. Through the synergistic process of low-temperature preparation of the alloy nano-coating, densification annealing, and pre-oxidation, the high-temperature strength and phase stability of the coating are improved by utilizing the lattice distortion effect. A thermodynamically stable protective oxide film of aluminum oxide and chromium oxide is generated in situ on the surface, solving the problems of traditional chromium-based coatings such as few main components, poor oxidation resistance, and short lifespan. This significantly improves the service reliability and safety of nuclear reactor structural materials under high-temperature irradiation environments.

The invention relates to the field of refractory materials, in particular to a high-erosion-resistance refractory material based on boron nitride modification and a preparation method of the high-erosion-resistance refractory material. The problem that an existing refractory material is poor in erosion resistance is solved. The refractory material is prepared by taking zirconium dioxide, silicon dioxide, calcium oxide, ferric oxide and aluminum oxide as matrixes and adding samarium lanthanum magnesium aluminum composite gel powder and boron nitride loaded chromium sesquioxide, magnesium nitrate, aluminum nitrate, samarium nitrate, lanthanum nitrate and citric acid form gel, high-temperature treatment is performed to obtain the samarium lanthanum magnesium aluminum composite gel powder, and the samarium lanthanum magnesium aluminum composite gel powder is added to the boron nitride loaded chromium sesquioxide. Boron nitride is loaded with chromium sesquioxide after being treated by tannic acid, the corrosion resistance of the material is enhanced through the synergistic effect of all the components, and the material is suitable for high-temperature furnaces, high-temperature reactors and other industrial environments needing high-temperature resistance and high corrosion resistance.

The invention discloses a petuntse composition, ceramic and application, and relates to the technical field of ceramic. The ceramic disclosed by the invention is obtained by sequentially carrying out ageing treatment, sieving treatment, injection molding, airing, drying and sintering treatment on a petuntse composition. The petuntse composition comprises a ceramic waste material A, a ceramic waste material B and modified particles with gallium-coated cuprous oxide as a core and aluminum oxide as a shell in a specific proportion. And the components such as a high-entropy oxide solid solution generated by the reaction of hafnium oxide, tantalum pentoxide, niobium pentoxide, titanium dioxide, zirconium dioxide, chromium sesquioxide and carbon powder, and chromium heptacarbide are introduced, so that the ceramic prepared from the ceramic waste has excellent fracture toughness, bending strength, wear resistance, high temperature resistance and self-repairing ability. Therefore, the method has a wide application prospect.

The invention discloses a ferrochrome liquid decarburization method based on partial roasting and step-by-step vacuum, and belongs to the technical field of ferroalloy smelting. During operation, only part of ferrochrome raw materials and powder need to be ground into powder and roasted into the endogenous oxidizing agent mainly comprising chromic oxide; then, in a vacuum induction furnace, the blocky ferrochrome and part of the oxidizing agent are molten to form a liquid molten pool, the oxidizing agent reacts with carbon in the melt through the process of combining step-by-step stepped vacuumizing and adding of the remaining oxidizing agent in batches, generated CO is rapidly pumped away by a vacuum system, and therefore deep decarburization is achieved. The method effectively solves the technical bottlenecks that a traditional oxygen blowing method cannot produce micro-carbon ferrochrome, and a vacuum solid-state method is tedious in raw material treatment and too long in decarburization period.

The present application relates to a kind of gray glass composition and car window glass.The above-mentioned gray glass composition includes base component and coloring component, and the mass percentage of coloring component in gray glass composition is as follows: total iron Fe2O3 1.3%~2.5%, titanium dioxide TiO2 100ppm~800ppm, chromium trioxide Cr2O3 100ppm~500ppm, cobalt oxide CoO 100ppm~400ppm, selenium Se 10ppm~50ppm and tin oxide SnO2 10ppm~50ppm.The above-mentioned gray glass composition has the comprehensive performance of low visible light transmittance, low infrared transmittance, low ultraviolet transmittance, low solar direct transmittance, and also has the neutral gray tone that satisfies visual comfort, also has great economic advantage.

The application discloses a kind of microcrystalline glass and its preparation method, cover plate glass and electronic equipment, belong to new material field, the composition of this microcrystalline glass is: with mass percentage, SiO2 60~80%, Al2O3 1~10%, Li2O 10~18%, ZrO2 3~12%, Na2O 0~5%, CaO 0~4%, P2O5 1~5%, K2O 0~3%, Cr2O3 0~10%, Fe2O3 0~10%, Cr2O3, Fe2O3 Two are not simultaneously 0 and 1.9wt%≤Cr2O3+Fe2O3≤10wt%, it contains the crystal phase that produces gold star effect in its crystalline phase, produces gold star effect crystal phase is dichromium trioxide crystal, or iron oxide crystal, or chromite spinel, or dichromium trioxide crystal and chromite spinel.

The invention belongs to the technical field of solid waste recycling and wastewater treatment, and particularly relates to a method for treating chromium-containing wastewater by adopting organic amine flue gas desulfurization residues. According to the method, the organic amine flue gas desulfurization slag is adopted as a reducing agent, hexavalent chromium is reduced into trivalent chromium, the trivalent chromium is separated from water in a precipitate form, and the precipitate is roasted to obtain chromium sesquioxide powder with relatively high purity in supernate; hexavalent chromium and total chromium can reach the national standard. According to the method, the treatment cost of the hexavalent chromium wastewater and the flue gas desulfurization slag is remarkably reduced, and meanwhile, the resource utilization of the flue gas desulfurization waste in a waste-to-waste manner is also realized.

This invention discloses a ceramic clay composition, ceramics, and their applications, relating to the field of ceramic technology. The ceramics of this invention are obtained by sequentially processing the ceramic clay composition through a process of material conditioning, sieving, casting, air drying, oven drying, and sintering. The introduction of specific proportions of ceramic waste A and B, modified particles with a gallium-coated cuprous oxide core and an alumina shell, and high-entropy oxide solid solutions generated from the reaction of hafnium dioxide, tantalum pentoxide, niobium pentoxide, titanium dioxide, zirconium dioxide, chromium trioxide, and carbon powder, as well as chromium heptacarbonide, into the ceramic clay composition gives the ceramics prepared from the ceramic waste excellent fracture toughness, flexural strength, wear resistance, high-temperature resistance, and self-healing ability. Therefore, this invention has broad application prospects.

The invention is applicable to the field of preparation of rare earth ceramic pigments, and provides a preparation method of a rare earth ceramic pigment for building wall surfaces, which comprises the following steps: S1, weighing industrial neodymium oxide and aluminum oxide in equal proportion, adding water, mixing and grinding to obtain slurry A; s2, weighing yttrium oxide and aluminum hydroxide in equal proportion, adding water and chromium sesquioxide, and mixing and grinding to obtain slurry B; s3, mixing the slurry A obtained in the step S1 and the slurry B obtained in the step S2 to obtain slurry C; and S4, the slurry C is poured into a drying cylinder to be dried, a stirring mechanism is arranged in the drying cylinder to stir and heat the slurry C, and a spiral conveying mechanism in the drying cylinder drives the slurry C to be vertically conveyed. The problems that in a traditional drying process, due to the fact that the conveying speed is not matched with the heating uniformity, the drying efficiency is low, and materials are heated unevenly are solved.

The invention relates to the field of resistor discs, and particularly discloses a metal oxide resistor disc and a preparation process thereof, and the preparation process comprises the following steps: S1, mixing zinc oxide, antimony trioxide, chromium sesquioxide, manganese dioxide, aluminum nitrate and silver nitrate to prepare a slurry, adding a surface modifier, and mixing to prepare a mixed slurry; s2, drying the mixed slurry to obtain prefabricated powder, pre-sintering the prefabricated powder to obtain a pre-sintered mixture, grinding the pre-sintered mixture, and drying the ground pre-sintered mixture to obtain additive composite powder; s3, manganese carbonate, bismuth trioxide, nickel oxide and cobaltosic oxide are mixed to serve as an additive mixture, a tin dichloride solution is added, and a mixed solution to be deposited is prepared after stirring; s4, mixing the to-be-deposited mixed solution with an adhesive, absolute ethyl alcohol and additive composite powder, then drying, carrying out compression molding, and then carrying out calcination treatment; and S5, performing post-treatment to obtain the metal oxide resistor disc. The resistor disc has the advantages that the porosity of the resistor disc is reduced, the through-flow capacity is improved, and the electrical performance is improved.

The invention belongs to the technical field of preparation of nano metal ceramic composite powder, and particularly relates to superfine-grained thermal spraying powder and a preparation method thereof.The preparation method of the superfine-grained thermal spraying powder comprises the following steps that S1, a first carbon blending material and a second carbon blending material are obtained, the first carbon blending material comprises chromic oxide and carbon black, and the second carbon blending material comprises chromium oxide and carbon black; the second carbon blending material comprises nano tungsten powder and carbon black; s2, the first carbon blending material and the second carbon blending material are mixed and then subjected to high-temperature carbonization, and tungsten-chromium composite powder is obtained; s3, tungsten-chromium composite powder, cobalt powder, deionized water and a forming agent are mixed and then subjected to ball milling, spray drying granulation, sintering and crushing, and superfine nanocrystalline thermal spraying powder is obtained; in the process of preparing the tungsten-chromium composite powder, the addition of chromium can effectively inhibit the growth of tungsten carbide in the carbonization process of the nano tungsten powder, meanwhile, tungsten carbide can inhibit the growth of chromium / chromium carbide, and the tungsten carbide and the chromium / chromium carbide inhibit each other, so that the preparation of the ultrafine-grained powder is realized.

The invention relates to the field of electronic materials, and particularly discloses a low-gradient zinc oxide varistor and a preparation method thereof. The invention relates to a low-gradient zinc oxide piezoresistor disc, which is prepared from the following raw materials in parts by weight: 88 to 96 parts of zinc oxide, 1.5 to 3 parts of antimony trioxide, 2 to 5 parts of bismuth trioxide, 0.2 to 1.8 parts of nickel oxide, 0.1 to 0.9 part of cobalt sesquioxide, 0.1 to 0.4 part of manganese oxide, 0.02 to 0.07 part of chromium sesquioxide, 0.15 to 0.18 part of lithium acetate, 1.2 to 1.8 parts of dispersing agents, 1.8 to 2.5 parts of binding agents, 0.12 to 0.15 part of aluminum nitrate and 0.001 to 0.003 part of silver nitrate. Under the synergistic effect of all the components, by adjusting the use ratio of all the components, the potential gradient of the resistor disc can be reduced, the large-current endurance capacity of the resistor disc is improved, and the change of electrical performance after impact is reduced.

The application relates to the technical field of acid etching agents, and discloses a hydrofluoric acid acid etching agent and a preparation method thereof, wherein the hydrofluoric acid acid etching agent comprises the following components in parts by weight: 70-75 parts of hydrofluoric acid, 40-45 parts of carrageenan, 25-30 parts of a humectant, 35-40 parts of chromium trioxide and 125-130 parts of water. Through the technical scheme, the problems of easy oxidation, complex raw materials, complicated preparation process and low stability of the acid etching agent in the prior art are solved.

The application provides a method for co-extracting vanadium and chromium from high-chromium vanadium slag and application thereof. The method comprises the following steps: roasting high-chromium vanadium slag and calcium salt to obtain roasted clinker, leaching the roasted clinker with a leaching agent to obtain a leaching solution, cooling the leaching solution to obtain sodium orthovanadate and a crystallization mother liquor; adding calcium oxide to the crystallization mother liquor to obtain a chromium-containing solution, performing first reduction on the chromium-containing solution to obtain chromium hydroxide, and performing first calcination on the chromium hydroxide to obtain chromium trioxide; mixing the sodium orthovanadate, water and carbon dioxide to obtain sodium metavanadate, sequentially performing transformation and second reduction on the sodium metavanadate, and performing second calcination to obtain a reduction clinker; mixing the reduction clinker, washing water and sodium bicarbonate mother liquor to obtain a sodium-containing solution and primary vanadium trioxide, and washing the primary vanadium trioxide to obtain vanadium trioxide. The application realizes high-value conversion of high-chromium vanadium slag, and simultaneously considers simplicity and economy, and no high ammonia nitrogen, high salt water and ammonia-containing waste gas are generated.

This invention discloses a layered chromium-based cathode material for sodium-ion batteries and its preparation method, wherein the cathode material has the general formula NaCr. 1‑x M x O2, wherein M is Ti, V, Mn, Fe, Co, Ni, Mg, Zn, Ir or Cu, and 0.01≤x<0.1; the cathode material is granular with a particle size of 1-10μm, has a trigonal crystal structure, and exhibits no phase transition characteristics; the preparation process includes mixing sodium salt, chromium trioxide and metal oxide, pressing them into sheets, and then calcining them at 700-1000℃ for 8-12h in an inert atmosphere to obtain a layered chromium-based cathode material for sodium-ion batteries; this invention, by controlling the element ratio and high-temperature sintering reaction conditions, allows the precursors to diffuse into each other at high temperatures to form a continuous solid-state layered structure, thus preparing a sodium-containing trigonal layered oxide, which exhibits no phase transition characteristics during charging and discharging over a wide voltage range, has small volume changes during charging and discharging, and combines excellent electrochemical structural stability with air stability, significantly improving battery cycle life.

The invention discloses an Nb-Cr-Al ternary intermediate alloy and a preparation and application method thereof. The Nb-Cr-Al ternary intermediate alloy is prepared by taking aluminum as a reducing agent, niobium pentoxide and chromium sesquioxide as oxidants, calcium fluoride as a slag former and potassium chlorate as a heat generating agent through smelting by adopting a metallothermic reduction method; the Nb-Cr-Al ternary intermediate alloy is evenly mixed with sponge titanium, aluminum shots and Cr70Al alloy in proportion and pressed into an electrode block, then a plasma beam welding box is used for welding the electrode block, a primary electrode is manufactured, vacuum consumable electric arc melting is conducted through a vacuum consumable electric arc furnace, Ti-Al-Nb-Cr alloy is obtained, and the Ti-Al-Nb-Cr alloy is obtained. The high-melting-point Nb-Al intermetallic compound is effectively prevented from appearing in the cast ingot, the uniformity of chemical components of the cast ingot is guaranteed, the stability of the structure and performance of the alloy is guaranteed, and the metallurgical quality and the yield of the cast ingot are effectively improved.

This invention discloses a microcrystalline glass, its preparation method, a cover glass, and an electronic device, belonging to the field of new materials. The composition of the microcrystalline glass is as follows (by mass percentage): SiO₂ 60-80%, Al₂O₃ 1-10%, Li₂O 10-18%, ZrO₂ 3-12%, Na₂O 0-5%, CaO 0-4%, P₂O₅ 1-5%, K₂O 0-3%, Cr₂O₃ 0-10%, Fe₂O₃ 0-10%, where Cr₂O₃ and Fe₂O₃ are not both 0 and 1.9wt%≤Cr₂O₃+Fe₂O₃≤10wt%, the crystalline phase contains a crystal phase that produces a gold-like effect. The crystal phase that produces the gold-like effect is chromium trioxide crystal, or iron oxide crystal, or chromite spinel, or chromium trioxide crystal and chromite spinel.

The invention discloses a nano coating with high radiation heat exchange capacity and a preparation method, which belongs to the field of nano coating technology. By weight, it is composed of: 10-15 parts of cordierite micropowder, 4-8 parts of ferric oxide, 5-10 parts of silicon carbide, 5-10 parts of chromium oxide, 3-8 parts of titanium dioxide, 5-10 parts of aluminum oxide, 1-5 parts of nickel oxide, 8-12 parts of homemade modified silica mixed suspension, 18-28 parts of composite binder, 0.4-1.2 parts of dispersant, 0.1-0.2 parts of defoamer, 0.3-0.5 parts of leveling agent, and 12-22 parts of deionized water. The technical solution of this application introduces a homemade modified silica mixed suspension into the nano coating. The sterically hindered imidazole rigid group introduced by the modified silica can reduce the mobility of each segment in the coating under high temperature conditions, thereby further improving the temperature resistance of the coating.

The application relates to the field of electronic materials, and particularly discloses a low-gradient zinc oxide varistor disc and a preparation method thereof; the low-gradient zinc oxide varistor disc comprises the following raw materials in parts by weight: 88-96 parts of zinc oxide, 1.5-3 parts of diantimony trioxide, 2-5 parts of bismuth trioxide, 0.2-1.8 parts of nickel oxide, 0.1-0.9 parts of cobalt trioxide, 0.1-0.4 parts of manganese oxide, 0.02-0.07 parts of chromium trioxide, 0.15-0.18 parts of lithium acetate, 1.2-1.8 parts of a dispersing agent, 1.8-2.5 parts of a binding agent, 0.12-0.15 parts of aluminum nitrate and 0.001-0.003 parts of silver nitrate; under the synergistic action of the components, the use ratio of the components is adjusted, the potential gradient of the varistor disc is reduced, the large-current resistance of the varistor disc is improved, and the change of the electrical performance after impact is reduced.

The present invention relates to a chromium-containing acidic sintered ore, a preparation method thereof, and uses thereof. The chromium-containing acidic sintered ore comprises, by weight percentage, 5.5-6% silicon dioxide, 1.2-1.4% magnesium oxide, 3.2-3.7% calcium oxide, 2.5-3.2% aluminum oxide, 1.5-1.8% titanium dioxide, 0.55-0.63% manganese oxide, 0.3-0.5% chromium trioxide, 0.25-0.3% vanadium pentoxide, ≤0.11% phosphorus, and 57-60% TFe. The chromium-containing acidic sintered ore provided by the present invention can significantly reduce the viscosity of slag during blast furnace smelting by designing the composition of the sintered ore when the sintered ore replaces part of the pellets, thereby facilitating smooth blast furnace smelting.

The application discloses a method for cleaning and reprocessing and resource utilization of waste chrome tanning scraps and application thereof, and belongs to the technical field of solid waste resource utilization. The method is to use a citric acid-EDTA composite cleaning agent to clean and process the leather scraps and separate chromium; a composite enzyme preparation is used to enzymatically hydrolyze the chromium-removed leather residue under high temperature and high pressure to extract collagen; the chromium-containing filtrate is alkalized, precipitated and calcined to recover chromium trioxide; and finally, the enzymatically hydrolyzed residue is blended with a thermoplastic polymer to extrude plastic fillers. The application realizes efficient recovery of chromium and efficient extraction of collagen, and the process is clean and environmentally friendly, without toxic and harmful emissions, so that full-component and high-value utilization of the waste is achieved.

The invention relates to printing ink for automobile glass and a preparation method thereof, and belongs to the technical field of printing ink, the printing ink comprises the following raw materials: resin, frit, a surface composite modifier, an inorganic pigment, a solvent, a dispersant and a leveling agent; the glass material comprises a glass base material and a glass synergistic material. The chromic oxide, the cerium oxide, the sodium fluoride and the chromium carbide are used for forming the glass synergistic material, so that the acid and alkali corrosion resistance of the prepared printing ink for the automobile glass can be improved from improvement of a glass material network structure, improvement of chemical stability and strengthening of structural densification; meanwhile, a surface composite modifier composed of sodium citrate, ammonium polyacrylate and diethylene glycol monobutyl ether can modify a glass material, hinder agglomeration of particles in a system and effectively play an auxiliary role to further reinforce the acid and alkali corrosion resistance of the ink, and meanwhile it can be guaranteed that after the ink for the automobile glass is treated, the corrosion resistance of the automobile glass is improved, and the service life of the automobile glass is prolonged. The macroscopic appearance of the surface of the automobile glass is flat, smooth and clear, and lattice point diffusion is avoided.

The invention belongs to the technical field of ceramic surface treatment, and particularly relates to a ceramic surface protective agent as well as a preparation method and a use method thereof. The ceramic surface protective agent comprises the following components in parts by weight: 79-92 parts of an aggregate, 2-5 parts of an intermediate, 1-3 parts of an emulsifier, 3-8 parts of zirconium sol, 0.5-2 parts of a nano filler and 1-3 parts of a hardening agent, wherein the condensation body is solid paraffin, the intermediate is glycerol or 1, 2-propylene glycol, the nanometer filling body is a mixture of one or more of zirconium oxide, yttrium oxide and chromic oxide, and the hardening agent is polyethylene wax. The invention aims to develop a novel system ceramic protective agent and a preparation method and a use method thereof, the corrosion resistance of a ceramic plate is greatly improved, and meanwhile, the ceramic protective agent has excellent antifouling performance.

The application discloses a high-entropy rare earth chromate negative temperature coefficient thermosensitive ceramic material, a preparation method and application thereof, and belongs to the field of high-temperature thermosensitive sensors, and aims to solve the stability problem of a chromium-based perovskite in long-term use at high temperature, in particular the problem of electrical property decrease caused by Cr element volatilization. The negative temperature coefficient thermosensitive ceramic material is prepared by mixing raw materials lanthanum trioxide, neodymium trioxide, samarium trioxide, europium trioxide, gadolinium trioxide and chromium trioxide respectively with dysprosium trioxide, holmium trioxide, yttrium trioxide and erbium trioxide according to a stoichiometric ratio, and then performing wet ball milling, drying, powder calcination, cold isostatic pressing and high-temperature sintering, so that a perovskite structure (La 1 / 6 Nd 1 / 6 Sm 1 / 6 Eu 1 / 6 Gd 1 / 6 M 1 / 6 )CrO3 thermosensitive ceramic material is obtained, wherein M is Dy, Ho, Y or Er. The electrical performance parameters of the thermosensitive ceramic material are as follows: B 25℃ / 1500℃ =1927~2011 K, ρ 1500℃ =1.29×10 2 ~1.60×10 2 Ω·cm, and the thermosensitive ceramic material exhibits good high-temperature aging stability at high temperature (after aging for 500 hours at 1500 DEG C, the resistance drift rates are all less than 4.6%).

The present application belongs to the technical field of metallurgical equipment maintenance and special refractory ceramics, and discloses a magnesium-carbon brick residual thickness judgment method based on shape change and a magnesium-carbon brick structure. The magnesium-carbon brick is sequentially provided with an initial function section, a warning function section and a dangerous function section along the erosion direction of the working surface, each section adopts different geometric profiles of convex arc surface, parallel plane and concave arc surface, and chromium trioxide is added as a thermal characteristic indicator in the warning section, and boron carbide or yttrium oxide is added as a chemical characteristic indicator in the dangerous section. Through the cooperative design of geometric profile and characteristic indicator, combined with a multi-modal sensing unit, the present application realizes real-time collection, analysis and matching of the geometric and physical state of the inner wall of the furnace lining, can accurately determine the erosion stage and residual thickness grade of the magnesium-carbon brick, significantly improves the functional integration and service safety of special refractory ceramic products, and solves the problems of traditional refractory material thickness measurement, such as dependence on furnace shutdown, detection lag and insufficient precision.

The invention relates to the field of metallurgy, and provides a vanadium-chromium precursor alloy for hydrogen storage and a preparation method thereof.The method comprises the steps that vanadium pentoxide, chromium sesquioxide, aluminum particles and a slag former are mixed to obtain a mixed furnace burden; the mixed furnace burden is put into a furnace body to be smelted in advance, ignition smelting and electrified refining are carried out, and an alloy cake is obtained; and putting the alloy cake into a water tank for water quenching, soaking for a preset time, and then crushing and screening to obtain the vanadium-chromium precursor alloy. According to the method, the aluminothermic reduction formula and process are deeply optimized, and the high-quality vanadium-chromium alloy is directly prepared from the oxide. The oxygen content and the impurity level in the alloy can be effectively reduced, the alloy purity is remarkably improved, accurate regulation and control of vanadium and chromium components can be achieved, the subsequent hydrogen storage alloy synthesis requirement is met, rich slag generated after refining can be returned to the technological process to be reused, the resource utilization rate is greatly increased, and the production cost is reduced.

The utility model discloses a wear-resistant film-coated cover plate, a display module and a display device, the wear-resistant film-coated cover plate comprises a cover plate, the top of the cover plate is provided with a film-coated structure, the film-coated structure comprises a surface film-coated layer, a middle film-coated layer and a bottom film-coated layer, the bottom coating layer, the middle coating layer and the surface coating layer are sequentially coated on the surface of the cover plate from bottom to top to jointly form the coating structure. According to the wear-resistant coated cover plate, the display module and the display device provided by the utility model, multi-dimensional improvement of the performance of the cover plate is realized through layer-by-layer superposition of chemical substances with different properties, specifically, the chromium sesquioxide film layer (Cr2O3) is used as a middle layer, and external mechanical wear is effectively resisted by using excellent hardness and wear resistance of the chromium sesquioxide film layer (Cr2O3), so that the service life of the display module is prolonged. Meanwhile, the strontium titanate film layer (SrTiO3) serves as a bottom layer, a stable foundation is provided for a whole film coating system by means of the high dielectric constant and excellent insulativity of the strontium titanate film layer, and light conduction is optimized.