39results about How to "Precipitation stable" patented technology

A Ni-based alloy powder for processing or reparing the surface of iron and steel workpiece by spray and melting it contains C (0.4-1.2%), Si (3.5-5.0), B(2.5-4.5), Cr (13.0-20.0), Fe (0-17), V (0.5-1.8), Al (0.5-4.0), Ni and one of Nb, Ti, W, Mo and Cu. Its advantage is high antiwear property.

The invention relates to the technical field of precursors of lithium cobalt oxide serving as a positive electrode material of a lithium ion battery, and particularly relates to an aluminum cobalt carbonate/cobalt carbonate composite spherical precursor and a preparation method thereof. The nano basic aluminum cobalt carbonate/cobalt carbonate composite spherical precursor is composite material formed by taking spherical cobalt carbonate as a main body material and uniformly distributing nano basic aluminum cobalt carbonate crystal particles in a bulk phase of the main body material, the expression of the composite material is (1-x)[CoCO3].x [Co6Al2CO3(OH)16.4H2O], and x is greater than or equal to 0.001 and less than or equal to 0.04. The product obtained by the invention has better aluminum distribution uniformity, is applied to the preparation of lithium cobalt oxide (LCO), is easier to uniformly dope Al into LCO crystal lattices, and has excellent high-voltage cycle performance.

Provided is a recovery device and recovery method for recovering precious metals from waste liquid that contains precious metals using an electrolytic method. The disclosed recovery device and recovery method curbs the dispersion of precipitated particles and the amount of precipitate due to current anomalies, curbs short circuit failures due to anomalous deposition of precious metals resulting from electric-current constriction, and has even and stable deposition of precious metals. The precious metal recovery device is provided with a cylindrical expander cathode that is arranged along the inner circumference of a cylindrical metal container that forms an electrolytic cell and a cylindrical expander anode that is arranged along the exterior circumference of a pipe shaped anode. The upper part of the expander cathode is fixed to the upper shoulder of the metal container with a reverse L-shaped cross-section, the lower part of the expander cathode is fixed to the bottom of the metal container and both ends of the expander anode are fixed to the pipe shaped cathode with a C-shaped cross section.

The invention relates to the technical field of waste gas treatment, and particularly relates to a waste gas treatment agent prepared from the following raw materials in parts by weight: 20-40 parts of triisopropanolamine, 15-25 parts of polyethylene glycol, 3-9 parts of copper chloride, 5-15 parts of sodium hydroxide, and 10-20 parts of tannin. The waste gas treatment agent has high absorption and purification efficiency and relatively good solubilization effect, and can effectively remove SO2, NOx, CO2, CO, organic waste gas, heavy metals and other substances.

The invention belongs to the technical field of sewage treatment and particularly relates to a sewage treatment agent which is prepared from the following raw materials in parts by weight: 15-25 parts of polyferric chloride, 10-30 parts of starch acetate, 3-11 parts of tannin, 12-28 parts of rice straw, 5-20 parts of fly ash and 5-13 parts of lipase. With scientific and reasonable cooperation of the raw materials and under the synergistic effect of the components, the sewage treatment agent provided by the invention has a good flocculation effect, and realizes a remarkable effect of eliminating COD, soluble inorganic matters, organic pollutants, heavy metals and other harmful particulate matters in sewage; and the water quality completely reaches the discharge standard.

The invention relates to a method for synthesizing copper-based perovskite powder by a low-temperature solvent method. The method comprises the following steps: adding CsX and CuX into a polar organicmixed solution, and stirring for 4-6 hours at 40-70 DEG C, wherein the polar organic mixed solution is a mixed solution of N, N-dimethylformamide (DMF)and dimethyl sulfoxide (DMSO), the CsX is cesiumchloride, cesium bromide or cesium iodide, and the CuX is copper chloride, copper bromide or copper iodide. According to the synthesis process, constant-temperature growth on a hot plate is not needed, synthesis is directly conducted on a magnetic stirrer, the synthesis process has the advantages of being short in manufacturing period, low in cost, simple in growth step, environmentally friendlyand the like, and Cs3Cu2X5 powder with high crystallization quality is separated out within 5 hours.

The invention belongs to the technical field of metallurgy and particularly relates to rare earth superstrong steel and a preparation method thereof. According to the rare earth superstrong steel andthe preparation method thereof, a micro amount of rare earth element is added in maraging steel, the using amount of Ni is reduced, Co for use is eliminated, and cost is remarkably lowered. The tensile strength of the rare earth superstrong steel obtained due to the preparation method is not lower than 2000 MPa under the room temperature of (20 DEG C), the extending rate is not lower than 9%, hightensile strength and excellent toughness are achieved, and the problem that traditional maraging steel is high in strength, but low in plasticity is solved.

The invention discloses a method for measuring total chlorine in methanesulfonic acid. The method comprises the following steps: step 1, weighing a methanesulfonic acid sample of which the mass is 1-5 g, adding 5-20 ml of 10%-50% high-purity alkali solution, heating until crystal occurs, cooling, and then adding 5%-50% nitric acid to regulate the pH to be 1-4; step 2, adding 1-5 mL of 17g/L silver nitrate and 5-10 mL of 25% nitric acid solution, then adding 1-10 mL of 50%-100% polyalcohol as a dispersant, uniformly mixing silver chloride precipitate which is generated, standing for 10-40 minutes, and simultaneously preparing a blank solution; step 3, measuring the absorbancy of the sample solution and the blank solution; step 4, drawing a standard curve; and step 5, obtaining the content of the total chlorine in the sample solution according to the standard curve. The measurement method for measuring the total chlorine in the methanesulfonic acid provided by the invention has the advantages of being simple and easy to operate, good in reproducibility and high in recycle rate.

The invention discloses a fully synthetic metal working fluid formula for improving lubricity and a preparation method of the fully synthetic metal working fluid formula. The fully synthetic metal working fluid formula comprises the following components in percentage by weight, 0.1 to 1 percent of hyaluronic acid, 5 to 10 percent of trans-block polyether, 2 to 4 percent of isononanoic acid, 2 to 4percent of monoethanolamine, 4 to 6 percent of triethanolamine and the balance of water. According to the invention, hyaluronic acid is dissolved in water, can be adsorbed on the surface of metal ata high temperature during processing to form a uniform and firm matrix film, and can lock a large amount of moisture, and trans-block polyether in the moisture can be precipitated on the surface of the metal when being precipitated at the high temperature, so that an excellent cooling and lubricating effect is achieved.

The invention specifically relates to a treatment method and treatment system for a spent electroless nickel solution, belonging to the technical field of purification and treatment of spent electroless nickel solutions. According to the treatment method, the mother liquid of a spent electroless nickel solution is subjected to pretreatment so as to realize removal and sorted collection of a greatamount of nickel ions and phosphorus ions in the mother liquid of the spent electroless nickel solution, so the concentrations of nickel and phosphorus in the mother liquid of the spent electroless nickel solution are reduced; and then the mother liquid of the spent electroless nickel solution is mixed with cleaning wastewater produced in chemical nickel-plating so as to realize further removal and sorted collection of mixed waste liquid with low nickel ion and phosphorus ion concentrations, so the treatment load of a mixed waste liquid treatment device is reduced, and the stable operation ofthe whole treatment system is guaranteed.

The invention relates to high-niobium austenite heat-resistant steel having high tissue stability under 700 DEG C and a preparation method of the high-niobium austenite heat-resistant steel. The high-niobium austenite heat-resistant steel disclosed by the invention is reasonable in ingredient design, good in processing performance and high in cost performance ratio; under 700 DEG C, the tissue deposition phase in a long-term prescription is stable, and a sigma phase is not found, so that the situation that the alloy is subjected to embrittlement in the high-temperature service process caused by the sigma phase is avoided; and dispersion strengthening of secondary MX phase and Z phase is performed. The high-niobium austenite heat-resistant steel comprises the following components in percentage by mass of 18-22% of Cr, 17-22% of Ni, 1-2% of Nb, 0.01-0.08% of C, 0.01-0.15% of N, 0.1-1% of Co, Si, Mn, B and Zr of which the total quantity is greater than or equal to 0.4% and smaller than orequal to 1%, and the balance Fe. The preparation method comprises the following steps of performing melting to obtain alloy ingots; performing uniform annealing treatment on the alloy ingots; and performing solution treatment at 1200-1280 DEG C on the alloy ingots after uniform annealing for 20-120min.

The invention relates to an EuCl3-assisted growth method of a Cs3Cu2X5 perovskite single crystal. According to the method, CuX and CsX serve as raw materials, an organic mixed solution composed of methylformamide, dimethyl sulfoxide and methyl acetate serves as a crystal synthesis environment, EuCl3 is added at the temperature lower than 70 DEG C to assist growth, and high-quality Cs3Cu2X5 which is square in shape and remarkably improved in quantum efficiency is separated out. The Cs3Cu2X5 crystal grows on a hot plate at a constant temperature, has the characteristics of good crystal luminescence property, short manufacturing period, low cost, simple growth process, environmental friendliness and the like, and can be separated out within 24 hours.

The invention discloses a small sewage treatment sedimentation tank. The small sewage treatment sedimentation tank comprises a hull, a water inlet, a water outlet pipe and a support. The water inlet is communicated with a rectifier tank in one side in the hull. Flow baffles are fixedly installed in the hull. A set of sedimentation sloping plates are arranged below the hull. The bottom of the hullis provided with mud vents at equal intervals. The rectifier tank reduces the power of sewage entering the hull and reduces the sewage flowing rate so that the sedimentation is convenient. The at least two flow baffles can further reduce the water flow rate in the hull and stabilize the water. The set of sedimentation sloping plates accelerate the precipitation so that sludge floating is avoided.Through use of a slag discharge pipe and a slag blocking plate, the automatic floating slag removal is realized.

The invention discloses an anti-crystallization blanking coiling needle mechanism of ion wind static elimination of a lithium battery electrical core. The mechanism structurally comprises a shock insulator anti-collision plate, a double needle slot seat, a parallel port, a battery buckle seat, lithium battery tubes, a shell, a pole plate liquid column mechanism and a circuit board. The lithium battery tubes are cooperated with the pole plate liquid column mechanism, so that solid-liquid sealing isolation can be changed with transmission, each steel ball core centers and arcs a corresponding liquid column grooved drum in a sliding friction way, and the condition that a thick shell is expanded, deformed and cracked is eliminated; and a rubber tube grooved drum prevents a bottom electrolyte from shaking and puffing and further influencing a circuit, the steel ball displacement is adjusted and limited precisely, vertical displacement of a slide bar in the back side of a double pole plate can be adjusted autonomously according the magnitude of the electrode amount, it is ensured that the circuit in the lithium battery tubes is avoided from crystallization caused by precipitation of theelectrolyte, the possibility of explosion of casings of the lithium battery tubes is reduced, internal circulation of lithium ions is kept stable, the lithium ions are protected against precipitation,and a sound and stable circulation effect of the lithium ions and electrolyte is achieved.

The invention relates to an iron-based amorphous magnetically soft alloy for precision current detection and a preparation method thereof. The typical component of the iron-based amorphous soft magnetic alloy is FexNbyNizSinBm, wherein x=65-80 at%, y=5-8 at%, z=1-2 at%, n=8-15 at%, and m=4-10 at%. According to the iron-based amorphous soft magnetic alloy for precision current detection and the preparation method thereof, a formula is reasonable, a preparation process is simple, an interaction coupling effect between Fe and Nb, Ni, Si and B is good, the excellent soft magnetic performance is achieved, the Fe element serves as the main component, the cost of the material is greatly reduced, the magnetic performance is improved, Nb provides a nucleation site for precipitation of nanocrystals to hinder overgrowth of alpha-Fe (Si) nanocrystals, meanwhile, a crystallization temperature is increased, the thermal stability is improved, and an amorphous phase is stabilized; Ni improves the amorphous forming ability of the alloy and improves the saturation flux density; and Si can reduce an average grain size, broaden the temperature interval of alloy heat treatment and inhibit precipitation of secondary phases such as Fe-(B) to increase thermal stability, and the B element can play a role in stabilizing an amorphous phase and hindering further growth of grains.

The invention relates to a preparation method and application of a Fe < 3 + > precipitant in a manganese sulfate solution, and the preparation method comprises the following steps: firstly, adding amino o-xylylenediamine with the mass concentration of 30-35% into a sodium hydroxide solution with the mass concentration of 15-20% in a mass ratio of (1-1.5): (3-5) under a stirring condition, controlling the temperature to be 22-25 DEG C, and reacting for 2.5-3 hours to prepare a solution 1; introducing carbon disulfide gas into the solution 1 under the condition of 30-35 DEG C, stirring for 35-40 minutes, reducing the temperature to 10-12 DEG C, and naturally cooling and crystallizing; and finally, separating by adopting a centrifugal machine at the speed of 3000-3200r/min to obtain scaly white crystals, namely the Fe < 3 + > precipitant.