13 results about "Nitratine" patented technology

Provided is an Ni-based alloy tube that has excellent corrosion resistance against high-temperature molten nitrates over a long period of time and excellent high-temperature strength over a long period of time. The chemical composition of the Ni-based alloy tube is, in terms of mass%, 0.005-0.100% C, 0.010-0.500% Si, 0.010-0.500% Mn, 20.00-23.50% Cr, 8.00-10.50% Mo, 0.010-0.400% Ti, 2.50-4.60% in total of Nb and Ta, 0.010-1.50% in total of Cu and Co, 0.010-0.400% Al, 0.0150% or less P, 0.0150% or less S, 0.0010-0.0400% N, and 0.0100% or less O, with the remainder being Ni and impurities. At a thick central portion of the Ni-based alloy tube, the number density of inclusions having an Mo content of 5.0% or greater and a maximum length of 10 μm or less is 10-100 / mm2, and the average crystal grain size thereof is 4.0-8.0.

The invention relates to the technical field of element detection, in particular to a method for measuring the manganese content in copper concentrate, which comprises the following steps: weighing a copper concentrate sample with the mass of m in a tetrafluoroethylene beaker, and adding a small amount of water to soak the sample; adding nitric acid and hydrochloric acid, and heating at 200-300 DEG C for 5-10 minutes; then adding perchloric acid and hydrofluoric acid, heating at 200-300 DEG C until the copper concentrate sample is completely dissolved, and cooling to room temperature; adding dilute nitric acid, and heating to dissolve the separated salt crystals to obtain a to-be-detected pre-solution; transferring the to-be-detected pre-solution to a volumetric flask, adding water to dilute the pre-solution to a scale line, and uniformly shaking to obtain a to-be-detected solution; according to the method, a nitric acid-hydrochloric acid-perchloric acid-hydrofluoric acid mixed acid digestion system is adopted, so that the manganese element in the copper concentrate is completely dissolved, and the interference of a complex matrix on manganese determination is effectively solved; by combining the high sensitivity and multi-element analysis capability of the inductively coupled plasma emission spectrometer, a linear standard curve of a manganese element characteristic spectral line and concentration is established, and the accuracy and precision of quantitative analysis are remarkably improved.

The invention discloses a perovskite cathode material and a preparation method and application thereof, the general chemical formula of the material is La < 1.2 > Sr < 0.8 > Ni < 0.5 > Cu < x > Fe < 0.5-x > O < 4 + delta > (x = 0.2, 0.3, 0.4), and the material has an R-P perovskite structure of an I4 / mmm space group. The preparation method adopts a sol-gel method, takes nitrate as a raw material, and is prepared by chelating, gelatinizing, drying and calcining at 850 DEG C. The performance of the material is optimal when x is equal to 0.4, the electronic conductivity of the material at the temperature of 400 DEG C reaches 117Scm <-1 >, and the area specific resistance ASR in humid air at the temperature of 650 DEG C is 0.251 ohm cm. According to the invention, Fe and Cu are co-doped at a B site, and a series of materials of La < 1.2 > Sr < 0.8 > Ni < 0.5 > Cu < x > Fe < 0.5-x > O < 4 + delta > (x = 0.2, 0.3, 0.4) are designed and prepared, so that the conductivity and the catalytic activity of the materials are synchronously improved, and the requirements of PCFC cathodes are met.

The invention relates to a nano rare earth garnet-based material and a preparation method thereof. The invention relates to a nano rare earth garnet-based material. The chemical formula of the nano rare earth garnet-based material is Y3Al2Ga3O12. The preparation method solves the problem that in the prior art, a pure-phase Y3Al2Ga3O12 nano rare earth garnet-based material cannot be temporarily subjected to hydro-thermal synthesis. According to the preparation method, a simple hydrothermal method is adopted, nitrate is taken as a main material, and the preparation of the pure-phase Y3Al2Ga3O12 nano rare earth garnet-based material is realized by adjusting conditions and parameters such as the pH value, the reaction time and the reaction temperature of a system.

The invention discloses a method for inducing superconducting-insulator phase change of two-dimensional Mo2C through doping of rare earth elements. The method comprises the following steps: 1, weighing Mo2C powder and nitrate hydrate containing the rare earth elements in a glove box protected by inert atmosphere; 2, putting Mo2C powder and nitrate hydrate containing rare earth elements into a polytetrafluoroethylene lining of a hydrothermal reaction kettle, and adding deionized water to form a mixed solution; 3, sealing and then carrying out hydrothermal reaction; and 4, separating the reaction product, and carrying out washing and vacuum drying to obtain the rare earth element doped Mo2C material. A hydrothermal synthesis method is adopted, rare earth elements uniformly enter Mo2C crystal lattices in an atomic scale through in-situ ion exchange and doping in the hydrothermal reaction process, the Mo2C material uniformly doped with the rare earth elements is prepared, phase change of the Mo2C material from a superconductor to an insulator is achieved, operation is easy, conditions are mild, and cost is low.

The cubic boron nitride sintered body comprises 40% by volume or more and 80% by volume or less of cubic boron nitride particles and 20% by volume or more and 60% by volume or less of a binder phase, wherein the average particle size d of the cubic boron nitride particles is 0.1 μm or more and 3 μm or less, and the binder phase is at least one element selected from a second group consisting of a simple substance of one element selected from a first group consisting of Group 4 elements, Group 5 elements, Group 6 elements, and aluminum in the periodic table, an alloy consisting of two or more elements selected from the first group, and an intermetallic compound consisting of two or more elements selected from the first group, or at least one element selected from the first group and at least one element selected from a third group consisting of nitrogen, carbon, boron, and oxygen. and at least one selected from a fourth group consisting of a first compound consisting of a first compound represented by formula (I) and a solid solution derived from said first compound, wherein a coefficient of variation Z of the area ratio of said cubic boron nitride particles in a cross section of said cubic boron nitride sintered body is 0.25 or less, and said coefficient of variation Z is obtained by providing a total of 260 square unit areas, each of which has a side length twice the average grain size d of said cubic boron nitride particles, in an image obtained by binarizing a backscattered electron image obtained by imaging a cross section of said cubic boron nitride sintered body at 5000 times magnification using a scanning electron microscope, calculating a standard deviation of the area ratio of said cubic boron nitride particles in each of said unit areas and an average of said area ratios, and dividing said standard deviation by said average.

The invention discloses a method for testing metal impurities in a negative electrode material, which comprises the following steps of: weighing a negative electrode material sample, and putting the negative electrode material sample into a digestion tank; adding a digestion solution into the digestion tank, and carrying out pre-digestion; carrying out microwave digestion on the pre-digested sample, and fixing the volume; detecting the constant-volume sample to obtain the content of metal impurities; wherein the digestion solution is nitric acid, hydrochloric acid and perchloric acid. The test method can accurately and efficiently test the content of the metal impurities in the negative electrode material, can solve the problem that the current negative electrode material is difficult to digest, greatly reduces the influence of the digestion process on the test result, and improves the accuracy of the method.

This invention provides a grinding and flotation separation method for silicate minerals. The method includes: grinding a mixture containing silicate minerals, nitrite, and a solvent using grinding media to induce a redox reaction during grinding, resulting in a slurry; and performing flotation separation on the slurry to obtain a concentrate and tailings; wherein at least one of the silicate minerals and the grinding media contains iron, and the iron is primarily Fe2+ or Fe3+. 2+ and Fe 3+ The slurry contains one or more of the following forms: the solid matter includes mineral particles and Fe3O4, and at least some of the mineral particles are coated with an H2SiO3 layer. Compared with the traditional "grinding + flotation separation" method, the method provided in this application can improve the separation efficiency and recovery rate of various metal elements and silicate products in silicate minerals.

The invention relates to the technical field of rock ore testing, in particular to a chemical analysis method for nitratine ore components and application of the chemical analysis method. The method comprises the following steps: preparing a test solution by oscillating and filtering at room temperature; determining the content of nitrate radicals; determining the content of sodium ions; and calculating the content of sodium nitrate: calculating the content of sodium nitrate according to ion coordination. The method solves the problems that in the prior art, a nitratine ore chemical analysis method is tedious in operation, and standardized detection cannot be achieved, can provide a feasible method with a unified standard for nitratine ore detection, and can serve geological prospecting.

The invention relates to the technical field of radioactive waste solidification treatment, and provides a method for controlling ruthenium oxide (RuO2) precipitate morphology in a high-level liquid waste glass solidification process, and the method comprises the following steps: S1, mixing glass raw materials, heating and melting, cooling, and crushing to prepare 1-2 mm basic glass particles; s2, a nitrate reagent is dissolved in nitric acid, simulated high-level radioactive waste liquid with the nitric acid concentration being 1-8 mol / L is prepared, and dried simulated high-level radioactive waste is obtained after evaporation drying; s3, mixing the basic glass with the dried simulated high-level radioactive waste, heating and melting, and cooling to obtain a glass solidified body sample. The RuO2 morphology control is realized by regulating and simulating the concentration of nitric acid in the high-level liquid waste: in the step S2, when the concentration of the nitric acid is 1-3 mol / L, short rod-shaped and granular RuO2 crystals are mainly separated out from a solidified body; and when the concentration of the nitric acid is 3-8 mol / L, forming a long needle-shaped RuO2 crystal. In addition, the simulated high-level radioactive waste which is dried by distillation is calcined at 650-850 DEG C, so that more granular RuO2 crystals can be obtained or needle-shaped RuO2 can be converted into particles.

The invention discloses a granulation device containing crystal water nitrate. The granulation device comprises a conveyor belt mechanism, a liquid distributor, a powdery distributor, a melting furnace, a pulverizer, a scraper mechanism and a vibrating screen. According to the device, powdery nitrate is firstly laid on the conveying belt, then molten nitrate liquid drops are intermittently dropwise added, and the metal conveying belt is combined, so that efficient cooling granulation is achieved. A closed-loop recovery system is constructed through the vibrating screen and the cyclone dust collector, and the material utilization rate is increased. The device is compact in structure and stable in operation, is particularly suitable for granulation requirements of low-melting-point nitrate containing crystal water, and has good energy-saving property and environmental protection property.

The application relates to a preparation method of an anisotropic ten-faced nickel-manganese-neodymium ferrite wave-absorbing material and application thereof, and belongs to the technical field of wave-absorbing materials. The method solves the problem that the existing ferrite has a relatively thick matching thickness when absorbing low-frequency electromagnetic waves. The method comprises the following steps: adding magnetic particles into a nickel-manganese-neodymium ferrite-containing nitrate aqueous solution and uniformly mixing, adding citric acid, and adjusting the PH value to obtain a mixed solution; the mixed solution is vacuum dried after heating, and then is heated, ground, high-temperature calcined and ground to obtain the anisotropic ten-faced nickel-manganese-neodymium ferrite wave-absorbing material. The anisotropic ten-faced nickel-manganese-neodymium ferrite wave-absorbing material prepared by the method has a ten-faced crystal structure and multiple crystal structures, has excellent anisotropy, generates high magnetic loss, is beneficial to widening the effective absorption bandwidth of the material under a thinner matching thickness, realizes the lightness of the material, the process has the effect of enhancing the magnetic loss of the material, the method is simple, raw materials are rich in sources, and is suitable for the preparation of most low-frequency wave-absorbing materials.