32 results about "Cerium acetylacetonate" patented technology

The invention provides a method for preparing a water-soluble ceria nano-crystal, belonging to the nano material technical field. The prior CeO2 nano particles include oil-soluble CeO2 nano particles without surface finishing. A back flow hydrolization method is adopted in the invention. The method of the invention comprises the following steps that: 1. the water-soluble nano particles dispersed in a solution are synthesized; and the back flow hydrolization method is adopted, wherein the cerium source is acetylacetone cerium, and the solvent and the surface finishing agent are 2-pyrrolidone; technical parameters are as follows: the temperature of the back flow hydrolization is between 225 and 240 DEG C, and the time of the back flow is between 60 and 120min; 2. the water-soluble nano particles are separated from the solution; the solution containing the water-soluble nano particles is cooled down to the room temperature and undergoes the steps of deposition by methanol, centrifugal separation, washing by acetone and drying; technical parameters are as follows: the use level of the methanol is between 200 and 300ml, the use level of the acetone is between 50 and 80ml, and the solution is dried by N2 flow for 4h or at a temperature of between 50 and 60 DEG C for 5 to 10h. The water-soluble ceria nano particles finally obtained are ball-shaped and the average particle diameter of which is approximately 5 to 10nm.

A method for producing the buffer layer of a conductor coated with high temperature superconducting coating by means of macromolecule assisted deposition, which comprises: a. preparing waterless: weigh rare-earth acetate, or rare-earth propoxide, or rare-earth acetylacetonate, or zirconium propoxide, or zirconium n-butoxide and cerium acetylacetonate at an ionic ratio of rare-earth or zirconium: cerium as x:1-x (0.01<=x<=0.5), dissolve the compound in an organic solvent to form a waterless; b. preparing colloid: add polyvinyl butyral, or polyethylene glycol, or polyvinyl pyrrolidone, or polyvinyl alcohol, or polyoxyethylene to the waterless solution to form colloid; c. coating the colloid and drying: coat the colloid on a substrate and then dry the substrate; d. sintering: load the substrate into a sintering oven, heat up to 850-1150 DEG C at 5-100DEG C/min, hold for 0.25-2h, and drop the temperature at 1-2 DEG C/min to room temperature. The method is characterized in simple process, easy operation control, low cost, and free of environment pollution; the single-layer cerium oxide buffer layer obtained can be in critical thickness of 150-200nm.

The invention discloses a microporous ceramic, which is characterized by comprising the following raw materials in parts by weight: 50-75 parts of dimethyl sulfoxide, 3-5 parts of copper oxide, 15-45 parts of trichloromethane, 1.8-7.9 parts of silicon oxide, 15-20 parts of cerium acetyl acetonate, 32-44 parts of polycarbosilane, 45-61 parts of porcelain stone, 25-47 parts of magnesite, 3-4.8 parts of wollastonite, 5-18 parts of allophone, 11-15 parts of dimethylaniline, 5-11 parts of hafnium acetylacetonate, 26-49 parts of cresol, 10-19 parts of ferric acetylacetonate, and 5-9 parts of antimony oxide. The microporous ceramic has the beneficial effects that the obtained ceramic belongs to the microporous field, is suitable for a carrier of a catalyst, an adsorbing separation material and the like, and is wide in application prospects; and a foaming agent, a pore production agent and the like are not required, so that the distribution unevenness of pores caused by insufficient mixing of raw materials can be avoided. The microporous ceramic is relatively simple in technology, the cost is lowered to a certain extent, and the application potential can be promoted.

The invention discloses a preparation method of hydrogenated nitrile butadiene rubber and belongs to the technical field of rubber. The preparation method comprises: adding ortho-silicic acid into ferrous nitrate, magnesium nitrate, urea and cerium acetylacetonate, adjusting pH with ammonia water to obtain mixture, drying and calcining the mixture, introducing high-purity hydrogen, mixing with hydrochloric acid for soaking, adding hydrogen peroxide and nitrile butadiene rubber, filtering after ultraviolet irradiation and hydrogenation, and cooling and drying residue to obtain the hydrogenated nitrile butadiene rubber. Embodiments prove that the process of the invention is simple, production cost is lowered, reaction conditions during preparation are mild, the preparation process is safe and reliable, catalysts are simple to separate and recycle, catalytic activity is improved, the prepared hydrogenated nitrile butadiene rubber has good thermal stability and thermal aging performance and high applicable value and is widely applicable to the fields such as oilfield and automobile industry.

The invention discloses binary material (Zr,Ce)O2 nanodots, and a preparation method and application thereof, belonging to the technical field of high-temperature superconducting materials. The preparation method comprises the following steps: dissolving zirconium acetylacetone and cerium acetylacetone in a zirconium-to-cerium mol ratio of (1-x):x into propanoic acid to obtain a precursor liquid; spreading the precursor liquid onto a monocrystal substrate to obtain a precursor film; in a protective gas atmosphere, sintering the precursor film at 950-1200 DEG C for 10-500 minutes to obtain discontinuous Ce-doped ZrO2 nanodots of which the heights are 5-60nm, the diameters are 20-150nm and the grain density is 10-100/mu m. A low-fluorine MOD (metal-organic deposition) technique is used for preparing a YBCO (yttrium barium copper oxide) film on a transition layer substrate coated with nanodots to enhance the superconductivity of the YBCO film under the action of an external magnetic field. The shape, number and distribution of the nanodots disclosed by the invention can be effectively controlled in a simple way.

The invention discloses a biomass fuel having a high fuel value, and a preparation method thereof. The biomass fuel comprises, by weight, 40-50 parts of straws, 56-64 parts of Diaphragma juglandis, 11-19 parts of nanometer zinc oxide, 5-12 parts of peroxidase and 8-16 parts of cerium acetylacetonate. The preparation method comprises the following steps: crushing the straws and Diaphragma juglandis, adding water, carrying out heating treatment, adding the peroxidase, sealing and stirring the heated mixture and the peroxidase, mixing obtained mixture with the nanometer zinc oxide and cerium acetylacetonate, cooling the obtained mixture to -5-0 DEG C, carrying out pressurizing heat insulation, heating the obtained mixture to 50-55 DEG C according to a rate of 5 DEG C/ 0.5 h, carrying out vacuum pumping during the heat insulation period every 1 h for 10 min, and cooling the mixture to room temperature in order to obtain the biomass fuel. The biomass fuel has the advantages of low water content, high lignin content, high fuel value, long burning time, no smoke or smell in the burning process, cleanness, environmental protection, high forming rate, small size, large specific gravity, high binding capacity of all raw materials, no dust pollution, large density, and wide application range, and can be used in industrial and agricultural production, power generation, heating supply warming, burning boilers, cooking and so on.

The invention discloses a preparation method of an yttrium barium copper oxide (YBCO) coating conductor. The method comprises the following steps of: firstly mixing and dissolving yttrium acetate (CH3COO)3, barium acetate Ba (CH3COO)2 and cupric acetate Cu(CH3COO)2 according to the molar rate of Y to Ba to Cu=1.2-1.5 to 2 to 3 into water solution with 10-30 mol percent of trifluoroacetic acid; uniformly stirring the mixture, and drying solvent in vacuum to prepare gel; adding methanol into the mixture for uniformly stirring, and drying the solvent to prepare the gel; subsequently, adding proper amount of methanol and terpinol to prepare a solution of which the total concentration of three metal ions of Y, Ba and Cu is 1.5-3.0mol/L; uniformly stirring the mixture and adding 5-10 percent of acetylacetone having the total ion mol concentration of three metals to prepare a precursor; coating the precursor on a substrate; performing thermal-treatment on the coated film at the low temperature of 300-500 DEG C and decomposing trifluoroacetic acid salt; and finally performing high-temperature thermal treatment at the temperature of 750-850 DEG C and an annealing process at the temperature of 450-550 DEG C to form YBCO superconduction composite film containing nanometer yttrium oxide and nanometer cerium acid barium. The critical current density of the YBCO film prepared by the method reaches 5MA/cm2 (77K, 0T).

The invention discloses a medium-low-temperature denitration catalyst with mesoporous cerium oxide as a carrier and a preparation method. According to the denitration catalyst, the mesoporous cerium oxide is utilized as the carrier, WO3 is utilized as an aid, MnOX is utilized an active ingredient, the mass fraction of the W is 5 to 8%, and the mass fraction of the Mn is 5 to 11%; the catalyst is marked as MnOX-WO3/CeO2-S-C, wherein the S is equal to a surface active agent, and the C represents organic cerate of cerium acetylacetonate hydrate, cerium isopropoxide, 2-cerium ethylhexoic acid andthe like. According to the medium-low-temperature denitration catalyst disclosed by the invention, the ordered mesoporous aluminum oxide carrier prepared by a solvent-free method has the advantages ofgood ordered mesopores, larger specific surface area, controllable structure, easiness in operation, large-scale production and good application prospect; furthermore, the compound catalyst preparedfrom dipping has a good nitric oxide purifying rate and excellent sulfur resistance in a 100 to 350 DEG C temperature range.

The invention discloses low-consumption high-strength glass ceramic which is characterized by comprising, by weight, 21-82 parts of sericite, 4-16 parts of acetylacetone cerium, 5-28 parts of polyethylene glycol monomethyl ether metacrylic acid ester, 10.5-32.5 parts of manganese dioxide, 13-37.9 parts of hydrophobic modified nanoscale silicon oxide, 1-8 parts of polyacrylate, 11-30 parts of pyrophyllite, 5-21 parts of hydroxyapatite, 1-20 parts of polycarbosilane and 17-54 parts of spinel. By means of the low-consumption high-strength glass ceramic, the utilization rate of solid waste is improved, environment pollution caused by the solid waste is lowered, resource consumption is reduced, and the strength of the glass ceramic is improved; the environment pollution problem is solved, waste is turned to wealth, and environment protection benefits and economic benefits are both achieved.

The invention discloses a microporous ceramic used for processing sewage. The microporous ceramic comprises the following raw materials in parts by weight: 30-42 parts of dimethyl sulfoxide, 5-10 parts of magnesium oxide, 10-18 parts of trichloromethane, 5-10 parts of iron oxide, 11-15 parts of cerium acetylacetonate, 1-4 parts of antimony oxide, 10-22 parts of silicon nitride, 2-5 parts of barium carbonate, 3-10 parts of magnesite, 5-8 parts of dimethylaniline, 20-30 parts of porcelain stone, 1-8 parts of quartz powder, 2-5 parts of allophone, 5-10 parts of aluminum acetylacetonate, 1.5-2.5 parts of polycarbosilane, 2-5 parts of cresol, and 3-5 parts of wollastonite. The microporous ceramic selects a plurality of raw materials with reasonable ratio, the size of the aperture can be controlled in a small scope, the finally produced microporous ceramic has stable and efficient filtering capability. The raw material configuration can uniformly distribute heat during a ceramic sintering process, so that the aperture distribution on the ceramic is more uniform, and the filtering capability stability can be guaranteed.