21 results about "Trioxide" patented technology

The invention discloses a rare earth element modified nickel-based nano-catalyst and a preparation method and application thereof.The rare earth element modified nickel-based nano-catalyst comprises a carrier and an active component loaded on the carrier, and the carrier is cerium dioxide and yttrium oxide co-doped three-dimensional ordered silicon dioxide nanoparticles; the active component is metal nickel. The application refers to the application of the catalyst in preparation of synthesis gas through carbon dioxide methane reforming. According to the invention, rare earth element doped and modified three-dimensional ordered silicon dioxide nanoparticles are used as a carrier, nickel metal is loaded on the nanoparticles, and the problem of carbon deposition can be effectively reduced by adjusting the interaction of alkaline sites and oxygen vacancies on the surface of the catalyst and the metal carrier. The method provided by the invention is helpful for realizing industrialization of a carbon dioxide methane catalytic reforming reaction, realizing a carbon emission reduction target and solving a green electricity energy storage problem.

The invention discloses a space anti-radiation glass cover sheet and a preparation method thereof, the glass cover sheet comprises the following raw materials by mass: 50-70 parts of silica, 5-15 parts of sodium oxide, 5-10 parts of lithium oxide, 5-10 parts of diboron trioxide, 3-10 parts of lead oxide, 2-6 parts of cerium oxide, 0.5-6 parts of potassium oxide, and 2-5 parts of alumina. According to the invention, PbO and CeO2 are added into the preparation raw materials, so that the radiation resistance of the glass cover plate is enhanced.

The application discloses a network soil thermal desorption catalyst, a preparation method and application thereof, and belongs to the field of environmental protection. The catalyst takes an iron net as a carrier and takes manganese-cobalt composite metal sulfide as an active component. The mass content of the active component is 3-6% based on the mass of the carrier. The scheme is characterized in that the iron net is subjected to oxidation pretreatment, so that an iron trioxide oxidation layer is formed on the surface; then the iron net is immersed in an active component solution to perform electrochemical deposition loading; finally, the finished catalyst is formed through special atmosphere calcination. The catalyst is environment-friendly, can efficiently induce the thermal desorption of organic pollutants in soil, and can realize 100% removal of o-xylene at 120 DEG C. Meanwhile, the catalyst is convenient to recycle, has higher economic benefits and wide market application prospect.

The invention belongs to the technical field of functional material preparation, and provides GYbZ powder for PS-PVD spraying and a preparation method of the GYbZ powder. The preparation method comprises the following steps: mixing powder preparation raw materials with water, and carrying out ball milling to obtain slurry; sequentially carrying out spray granulation and drying on the slurry to obtain a granular material; and sintering and spheroidizing the granular material by adopting plasma flame, and crushing the obtained spheroidized powder to obtain the GYbZ powder, raw materials for preparing the powder comprise the following components in percentage by mass: 38-42% of zirconium dioxide, 5-8% of ytterbium trioxide, less than or equal to 1.0% of hafnium oxide and the balance of gadolinium trioxide. According to the method, the granular material is sintered and spheroidized by adopting plasma flame, so that pores in the final GYbZ powder are relatively few. Data of the embodiment shows that the porosity of the obtained GYbZ powder is 15-19%.

The application relates to a wide-temperature-range negative temperature coefficient thermosensitive ceramic material and a preparation method thereof. The thermosensitive ceramic material comprises, in percentage by weight, 58.17-71.47% of lanthanum trioxide, 20.53-23.01% of aluminum trioxide, 3.98-15.36% of cerium dioxide and 1.54-5.94% of niobium pentoxide, and the chemical composition is La 1‑ x Ce x Al 1‑y Nb y O3, wherein x=0.05-0.20 and y=0.025-0.10. The NTC thermistor has the advantages of an ultra-wide temperature range (25 DEG C-1500 DEG C), good consistency of resistance value and B value, a resistance drift rate of less than 0.375% after aging for 500 hours at high temperature, high stability, long service life and the like.

A glass includes a composition characterized by the following constituent phases (in mol-%): 20-80 lanthanum titanate; 10-50 lanthanum niobate; 0-60 lanthanum molybdenum borate; 2-40 lanthanum borate; 2-40 yttrium borate; 0-40 gadolinium borate; 2-40 zirconium silicate; 2-40 diboron trioxide; and 0-20 silicon dioxide. A refractive index is at least 2.00.

The invention belongs to the technical field of urea electrode materials produced through coupling of new energy electroreduction CO2 and NO3 <->, and discloses a copper-doped cobaltosic oxide electrode material and a preparation method and application thereof.The method comprises the steps that S1, foamy copper is sequentially soaked in hydrochloric acid, acetone, ethyl alcohol and water to be pretreated, and foamy copper without impurities on the surface is obtained; s2, dispersing a cobalt source and an organic ligand in a solvent, and stirring to obtain a mixed solution; s3, enabling the pretreated foamy copper and the mixed solution to react in a high-pressure reaction kettle, cooling to room temperature, cleaning with deionized water, and performing vacuum drying to obtain a copper-doped cobaltosic oxide electrode material; the application comprises application of the electrode material in preparation of urea through electrochemical co-reduction of CO2 and NO3 <->.

The invention relates to the field of inorganic materials, in particular to a preparation method of antimony trioxide nanoparticles, which specifically comprises the following steps: uniformly mixing antimony sulfide ore with inorganic fused salt, transition metal oxide and a carbon material, grinding into powder, pressing the powder into blocks, smelting to obtain molten liquid, separating crude antimony from the molten liquid, dissolving the crude antimony with hydrochloric acid, and drying to obtain the antimony trioxide nanoparticles. Adding high-purity antimony powder, stirring and reacting to obtain an antimony trichloride crude solution, filtering the antimony trichloride crude solution, adding ammonia water and ionic liquid into the obtained filtrate, stirring and reacting, collecting a product, and drying. The inorganic molten salt contains metal fluoride, and antimony trioxide prepared by the method not only has a cubic crystal form, but also has a nano size, and is higher in economic added value and wider in application prospect.

This invention provides an orthogonal single-crystal manganese trioxide, lithium manganese oxide, and their preparation method, relating to the field of lithium battery technology. The orthogonal single-crystal manganese trioxide comprises mixing single-crystal manganese tetroxide with a dopant to obtain a mixture; the dopant has an ionic radius between 0.5 Å and 0.8 Å and is capable of at least partially replacing Mn. 3+ A metal dopant is introduced into the manganese trioxide lattice; the mixture is calcined at 700℃~900℃ for 3 hours~24 hours to obtain orthorhombic single-crystal manganese trioxide. The method provided by this invention can achieve the structural transformation from manganese tetroxide to manganese trioxide, obtaining orthorhombic single-crystal manganese trioxide with good crystallinity. The introduction of the dopant contributes to lattice stability and reduces oxygen defects. Controlled calcination temperature and time can obtain products with uniform morphology and stable structure, facilitating subsequent material applications.

The application relates to the technical field of nanometer materials, and discloses ferroferric oxide as well as a preparation method and application thereof. The preparation method of the ferroferric oxide provided by the application comprises the following steps: placing a substrate above an iron source, depositing and growing under an oxidizing atmosphere for 8-10 min, and obtaining the ferroferric oxide after cooling; the oxidizing atmosphere comprises oxygen, and the flow rate of the oxygen is 40-60 sccm. The ferroferric oxide prepared by the method has uniform element distribution and high crystal phase purity, the material has a thermodynamically stable polycrystalline structure containing only a single crystal boundary, the single twin boundary can effectively modulate the micro-interface arrangement, and the gate control capability of the transistor of epsilon-Fe2O3 is significantly improved.

This invention belongs to the technical field of resistive electrical components, and specifically relates to a method for preparing a zinc oxide resistor with high gradient and high current flow stability. The zinc oxide resistor comprises: zinc monoxide, bismuth trioxide, antimony trioxide, nickel trioxide, manganese tetroxide, cobalt tetroxide, tin dioxide, boron trioxide, nano-silver powder, aluminum nitrate nonahydrate, barium acetate, binder, dispersant, and deionized water. The zinc oxide resistor designed in this invention has the advantage of good stability under high gradient and high current flow, overcoming the degradation behavior of existing zinc oxide varistors caused by the influence of high current surge impact on the zinc monoxide grain boundary barrier, and is suitable for industrial application.

This invention discloses a perovskite-structured high-entropy negative temperature coefficient thermistor ceramic and its preparation method. The high-entropy negative temperature coefficient thermistor ceramic is prepared by sintering a mixture of oxides of lanthanum trioxide, neodymium trioxide, samarium trioxide, gadolinium trioxide, and RE, along with manganese dioxide. The oxides of RE are yttrium trioxide, cerium dioxide, dysprosium trioxide, holmium trioxide, ytterbium trioxide, or scandium trioxide. The material constant B of the high-entropy negative temperature coefficient thermistor ceramic is... ‑75 / 150℃ =1960K~2654K, resistivity ρ 0℃ =2122Ω·cm~6807Ω·cm, applicable temperature range is -75℃~150℃.

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 invention belongs to the technical field of building materials, and particularly relates to a high-doping-amount fine-fraction iron tailing-based cementing material as well as a preparation method and application thereof. The high-doping-amount fine-fraction iron tailing-based cementing material comprises the following components: iron tailing active powder, an alkali activator, high-calcium silicon-aluminum solid waste, a sulfate activator and an ion complexing regulating agent, in the cementing material system, the molar ratio of calcium oxide to silicon dioxide is 1.0-3.0, the molar ratio of aluminum oxide to calcium oxide is 0.01-0.3, the molar ratio of sulfur trioxide to calcium oxide is 0.1-3.0, and the molar ratio of iron trioxide to calcium oxide is 0.06-0.15. Through multi-component coordinated regulation and ion complexing optimization, the mixing amount of the fine-fraction iron tailings exceeds 40%, meanwhile, it is guaranteed that the cementing material has excellent early-stage and later-stage strength, the utilization rate of iron-phase-containing silicon-aluminum solid waste is increased, and the environmental pressure is reduced.

The invention discloses wear-resistant domestic ceramic with good light transmittance and a preparation method thereof.The wear-resistant domestic ceramic comprises a ceramic body and a glaze layer, and the glaze layer is prepared from, by mass, 10-20 parts of calcined kaolin, 10-15 parts of silica sand, 2-5 parts of titanium dioxide, 0.5-1 part of rare earth oxide, 10-15 parts of zirconite, 5-10 parts of corundum, 2-5 parts of titanium carbide and 1-3 parts of dispersing agent; the rare earth oxide is formed by mixing lanthanum trioxide and cerium dioxide according to the mass ratio of (1: 3)-(1: 5); the ceramic green body is prepared from the following materials in parts by mass: 35 to 45 parts of calcined kaolin, 15 to 25 parts of mullite, 15 to 25 parts of albite, 5 to 15 parts of silica sand, 5 to 15 parts of zirconium silicate, 5 to 10 parts of sodium silicate, 5 to 10 parts of silazite, 5 to 10 parts of calcite, 2 to 5 parts of silicon carbide and 1 to 3 parts of dispersing agent. The wear-resistant domestic ceramic disclosed by the invention is flat and smooth in glaze surface, good in texture, excellent in hardness and bending strength, excellent in wear resistance and good in light transmission.

This invention relates to a zinc oxide-indium trioxide / graphite-phase carbon nitride photocatalyst and its preparation method, comprising the following steps: 1) preparing a zinc indium sulfide (ZnIn2S4) template; 2) preparing g-C3N4: using urea as a raw material and thoroughly mixing it with the ZnIn2S4 template to obtain a photocatalyst precursor powder; 3) calcining the photocatalyst precursor powder to prepare the zinc oxide-indium trioxide / graphite-phase carbon nitride photocatalyst. This preparation method is simple and convenient, and the prepared photocatalytic material exhibits higher visible light photocatalytic activity and stability (photochemical stability and photocatalytic stability) than the pure g-C3N4 sample, making it valuable for large-scale industrial applications.

The application discloses an indium trioxide nanotube loaded cobalt oxyhydroxide composite material and application of the composite material in detection of nitrogen oxide, and the composite material is obtained by uniformly mixing indium trioxide nanotubes and Co / MOF in an aqueous solution, adding an etchant to fully react, washing the reaction product to neutral, and then drying to obtain the composite material; the organic skeleton raw material in the Co / MOF is dimethyl imidazole; and the etchant is sodium hydroxide or potassium hydroxide. The method has the advantages of simple process, low cost and no pollution to the environment; the indium trioxide nanotube has the advantages of excellent conductivity, large surface area and chemical stability, and the synthesized low-cost sensing material has high response value at room temperature, rapid detection and good stability, and has excellent selectivity to nitrogen oxide; the composite material has excellent gas sensing performance, and has excellent long-term stability and cycle stability, and has wide application prospect in the field of detection of nitrogen oxide.

This high-purity digallium trioxide comprises digallium trioxide, and one or more impurity elements other than gallium and oxygen, wherein in glow discharge mass spectrometry, the total concentration of the impurity elements is at most 1 mass ppm, and the concentration of silicon, which is one of the impurity elements, is 0.01 mass ppm to 0.1 mass ppm.

The invention belongs to but not limited to the technical field of synthesis of inorganic materials, and discloses a cobaltosic oxide loaded nanoscale amorphous iridium oxide water electrolysis catalytic material and a preparation method thereof. The preparation method comprises the following steps: preparing a mixed solution of CoCl2. 6H2O, IrOx.xH2O and NaNO3; performing ultrasonic treatment and magnetic stirring on the mixed solution; drying in a drying oven at a specific temperature to obtain solid powder; carrying out calcination treatment on the solid powder in an air atmosphere, naturally cooling to room temperature, and reacting CoCl2. 6H2O and IrOx.xH2O with NaNO3 at a high temperature to generate a loaded nanoscale catalytic active component; and centrifugally collecting the obtained product, washing with ultrapure water and ethanol for multiple times, and drying to obtain the nanoscale loaded IrOx / Co3O4 catalyst. According to the prepared catalytic material, the loading capacity of Ir is reduced, and the catalytic performance and stability of the IrOx electrolysis water oxygen evolution reaction are improved.

The application discloses a rare earth yttrium oxide and cerium oxide doped high-temperature negative temperature coefficient thermistor material and a preparation method thereof, and relates to the technical field of resistor devices.The thermistor material is composed of a thermistor material of trimanganese tetroxide, diiron trioxide, aluminum trioxide, silicon dioxide, diyttrium trioxide and cerium dioxide;the molar ratio of manganese, iron, aluminum, silicon, yttrium and cerium in the trimanganese tetroxide, diiron trioxide, aluminum trioxide, silicon dioxide, diyttrium trioxide and cerium dioxide is 0.4-0.8:0.3-0.5:0.3-0.5:0.05-0.08:0.2-0.5:0.2-0.5;the application can realize stable negative temperature coefficient characteristics in a wide temperature range of 25 DEG C-900 DEG C, greatly improves the stability and reliability of long-term use at high temperature, reduces the resistance value drift risk, guarantees the uniformity of raw material mixing through step-by-step grinding and calcination, and improves the density of the ceramic material through the parameter matching of cold isostatic pressing and high-temperature sintering, so that the air holes and structural defects are reduced.

The application discloses a series of high-stability negative temperature coefficient thermosensitive materials based on seven main element high-entropy rare earth stannate and application, and aims to solve the problem that existing pyrochlore structure stannate thermosensitive materials cannot meet long-term application under high-temperature environment. The series of thermosensitive materials are prepared by mixing lanthanum trioxide, neodymium trioxide, samarium trioxide, europium trioxide, gadolinium trioxide, dysprosium trioxide and tin dioxide with erbium trioxide or ytterbium trioxide respectively, and the preparation process comprises the following steps: wet three-dimensional vibration ball milling, powder calcination, cold isostatic pressing forming, high-temperature sintering and the like, and finally, the negative temperature coefficient thermosensitive material with the pyrochlore structure is obtained. The electrical performance parameters of the series of materials are as follows: B = 13914-14067 ± 1.89%K, rho 1500℃ = 180.26-204.09 ± 1.38% Omega.cm. The negative temperature coefficient thermosensitive material has the negative temperature coefficient characteristics in a wide temperature range of 400-1500 DEG C, and exhibits excellent high-temperature aging stability under the high-temperature condition of 1500 DEG C; after 500 hours of aging test, the resistance drift rate is only 0.7%.