4 results about "Sesquioxide" patented technology

The application relates to the technical field of anti-radiation glass, and discloses anti-radiation glass for low-orbit spacecrafts, a preparation method and application thereof. The anti-radiation glass for low-orbit spacecrafts comprises the following raw materials in parts by mass: quartz sand 45.5-68 parts, aluminum hydroxide 8.41-10.25 parts, boric acid 8.86-24.62 parts, carbonate 24-43.69 parts, cerium dioxide 0.6-2.1 parts, gallium sesquioxide 0.2-1.2 parts, antimony sesquioxide 0.5-1 part, nitrate 2-4.6 parts, molybdenum dioxide 0.5-1.4 parts, lead oxide 0.8-2.2 parts, tetrabutyl titanate 3.4-12.75 parts, and kerosene 0.2-0.8 part. Through the technical scheme, the problem of insufficient anti-radiation performance of the glass for low-orbit spacecrafts in the related art is solved.

The application discloses a method and system for preparing manganese monoxide by adopting pyrolusite, through pretreatment of pyrolusite such as pyrolysis, hydrothermal reaction and oxidation reaction, low-cost and high-efficiency conversion of manganese tetroxide and manganese sesquioxide contained in the pyrolusite into manganese dioxide is realized, the product quality of the manganese monoxide prepared through subsequent fluidization reduction is improved, and a foundation is laid for subsequent high-efficiency leaching of manganese. The released carbon dioxide in the fluidization reduction process of the pyrolusite is recycled to prepare the recyclable CO for reduction, the carbon resources are maximally utilized, and the carbon emission is greatly reduced. The method has the characteristics of simple process flow, excellent operation condition, low fossil energy consumption, small environmental pollution, good economic benefit and environmental benefit and the like, and is expected to open up a more stable and efficient way for development and utilization of the pyrolusite.

The application relates to the technical field of quartz boat, and particularly discloses a high-temperature-resistant and corrosion-resistant quartz boat and a preparation method thereof. The application comprises the following operation steps: S1: quartz ore is sequentially subjected to heat explosion, drying, grinding, screening, HF acid soaking, magnetic separation, flotation, cleaning and drying treatment to obtain a crude product; the crude product is high-temperature calcined and directly transferred into mixed acid, and then subjected to room-temperature ultrasonic soaking, high-temperature ultrasonic soaking, cleaning, drying, high-temperature chlorination and quartz sand obtaining; S2: (1) the amino diamond and modified silicon nitride are ultrasonically dispersed in N,N-dimethylacetamide, pyromellitic dianhydride is added for reaction, and the composite material is purified and dried; (2) the lanthanum hexaboride and the iron sesquioxide are ball-mixed, and calcined to obtain lanthanum hexaboride-iron sesquioxide; S3: the quartz sand, chromium boride, aluminum oxide, composite material and lanthanum hexaboride-iron sesquioxide are uniformly mixed, sintered, and cooled and formed to obtain the quartz boat.

The application discloses a method for producing battery-grade trimanganese tetraoxide by using electrolytic manganese anode slime, and production is carried out according to the following method: (1) electrolytic manganese anode slime is broken and then dried; (2) the electrolytic manganese anode slime is mixed with a flux, and is roasted in a tubular furnace until the reaction is complete; the manganese sulfate is leached out by deionized water at room temperature, and is filtered to obtain leached manganese sulfate crude liquid and leaching residue; (3) a purifying reagent is added to the manganese sulfate crude liquid for purification; (4) ammonium bicarbonate is added to convert the manganese sulfate into manganese carbonate; the manganese carbonate is filtered to obtain manganese carbonate precipitate and ammonium sulfate solution; the manganese carbonate precipitate is calcined to obtain trimanganese tetraoxide; and the trimanganese tetraoxide is crushed, sand-ground, washed and dried to obtain battery-grade trimanganese tetraoxide. The manganese recovery rate can reach more than 99.3%, the energy consumption and cost are lower, and the problems of resource waste and environmental pollution caused by the manganese anode slime of electrolytic manganese manufacturers are solved.