32 results about "Cerium acetylacetonate" patented technology

The invention discloses low-carbon and high-cleanness fuel and a preparation method thereof. The fuel is prepared from raw materials in parts by weight as follows: 37-45 parts of methanol, 28-36 parts of diesel, 3-7 parts of tannin, 9-13 parts of cerium acetylacetonate and 2-4 parts of nano-zinc oxide. The preparation method comprises steps as follows: diesel, tannin and cerium acetylacetonate are mixed and are heated and stirred in a sealed manner, and a mixture A is obtained; methanol and nano-zinc oxide are mixed, heated and stirred, and a mixture B is prepared; the mixture A and the mixture B are mixed, heated and ultrasonically processed, and the fuel is prepared. The low-carbon and high-cleanness fuel has a good anticoagulant characteristic, and copper-strip corrosion index is 1. Due to the fact that an oil product contains sufficient oxygen, the fuel is burnt sufficiently, carbon deposition can be effectively reduced, a smoke intensity value is 0.3, purifying rate is 75%, and the fuel has better environmental-friendly performance. According to the low-carbon and high-cleanness fuel and the preparation method thereof, the basic raw materials are widely sourced, few raw materials are adopted, the production process is simple, operation is simple and convenient, production cost is low, and economic benefit and social benefit are remarkable.

Disclosed is a method for preparing a YBa2Cu3O7-x (YBCO) superconducting composite film, comprising mixing and dissolving ytterbium acetate <Y(CH3COO)3>, barium acetate <Ba(CH3COO)2>, and cupric acetate <Cu(CH3COO)2> into a water solution of trifluoroacetic acid according to a molar ratio of Y:Ba:Cu of 1.5:2:3; uniformly stirring, and evaporating the above solvent to dryness in vacuum to acquire a gel; adding methanol, uniformly stirring, and evaporating the resulting solvent to dryness to acquire a gel; adding methanol to prepare a precursor liquid in which the total concentration of the three types of metal ions of Y, Ba, and Cu is 1.5-3.0mol / L; coating the precursor liquid on a substrate; allowing the coated film to undergo a process of low-temperature heat treatment to decompose trifluoroacetate; allowing the coated film to undergo a process of high-temperature heat treatment to acquire a YBCO film having a tetragonal phase; coating a precursor liquid of cerium acetylacetonate on the YBCO film and carrying out a high-temperature heat treatment at a temperature ranged from 1000 DEG C to 1100 DEG C; and coating the precursor of Y, Ba, and Cu and the precursor of cerium acetylacetonate in turn repeatedly and carrying out corresponding heat treatment to acquire the YBCO superconducting film having a five-layer structure of YBCO / CeO2 / YBCO / CeO2 / YBCO with a thickness of 1.5 microns.

The invention relates to barium titanate ceramic with a wide curie temperature region and a preparation method thereof. The preparation method comprises the following steps: 1) dissolving one of cerium-2,4-pentanedionate hydrate, samarium nitrate hexahydrate and europium nitrate hexahydrate into glacial acetic acid together with barium acetate to obtain a barium-source solution; 2) dissolving tetrabutyl titanate into ethylene glycol monomethyl ether to obtain a titanium-source solution; 3) mixing the barium-source solution with the titanium-source solution, aging and drying obtained sol to obtain xerogel and then presintering, balling and drying to obtain barium titanate powder; 4) sequentially granulating, dry pressing and shaping, discharging sol and pressurelessly sintering the barium titanate to obtain barium titanate ceramic. The barium titanate ceramic disclosed by the invention has a wider curie temperature region, can meet design and use requirements of high-temperature ferroelectric devices and further has the advantage of good single phase.

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 preparation method of a magnesium and aluminum doped mesoporous hollow sphere ceria-based oxygen storage material and belongs to the technical field of oxygen storage material preparation. The method includes: weighing sodium silicate and water, dropwise adding hydrochloric acid solution, performing ultrasonic dispersion to obtain dispersion liquid, adding magnesium nitrate solution, aluminium nitrate solution, acetone and acetylacetone cerium, enabling the matters to be loaded to the surface of orthosilicic acid sediment under the action of ammonia water titration, performing calcination under nitrogen atmosphere after dehydration, washing with ethyl alcohol, sodium hydroxide solution and deionized water, and filtering to obtain filter residue prior to activation to prepare the magnesium and aluminum doped mesoporous hollow sphere ceria-based oxygen storage material. The preparation method has the advantages that the preparation steps are simple, specific surface area is increased effectively, and oxygen storage capacity is increased by 22-26%; the obtained produce is of a spatial stereostructure, and under the condition of over 1123K, sintering is avoided, and the oxygen storage capacity and the specific surface area are unchanged.