9 results about "Thermal decomposition method" patented technology

This invention discloses a rare-earth permanent magnet powder with a TbCu7 structure and its preparation method. The TbCu7 structured rare-earth permanent magnet powder has an Sm... 1‑a Zr a Fe 9‑y‑z‑r Co y Ti z D r M x The preparation method involves using ultrasonic spray thermal decomposition or chemical co-precipitation to prepare spherical composite oxides from soluble metal salts, followed by reduction treatment at a certain temperature, and finally, high-temperature heating to control the introduction of nitrogen or carbon elements into the unit cell. The resulting magnetic powder is predominantly composed of the SmFe9 phase, effectively controlling the Th2Zn content. 17 Sm2Fe 17 The generation of impurity phases is controlled by the process optimization of this invention, resulting in magnetic powder with controllable morphology and particle size, while reducing rare earth loss, which has significant industrial value.

The application provides a chain pyrolysis device with transverse flexible wires and a pyrolysis method, relates to the technical field of pyrolysis, and comprises a closed shell, a chain transmission mechanism, a flexible reaction net, a plurality of flexible scrapers and a baffle; the chain transmission mechanism comprises a pair of parallel horizontally placed flat annular plate chains and driving and supporting components thereof, is divided into a reaction zone, a separation zone and a driving zone; the flexible reaction net comprises a plurality of pairs of fin rods which are arranged at intervals on the two plate chains and a plurality of parallel flexible wires which are connected to the fin rods on the two sides respectively; one end of the flexible scraper is fixed to the inner surface of the closed shell above the separation zone and the other end can contact the flexible reaction net. The application can directly and efficiently pyrolyze large-size strip-shaped organic waste, so as to solve the technical problems that the existing pyrolysis device is prone to softening, caking and blocking of raw materials, serious coking and slagging and high pretreatment cost when processing strip-shaped organic waste.

The application relates to the technical field of magnetic particle imaging, and more particularly to an iron oxide nanoparticle and application of the iron oxide nanoparticle in magnetic particle imaging. The nanoparticle is an octahedral superparamagnetic ferroferric oxide nanoparticle, the nanoparticle is synthesized by adding a surfactant and controlling a reaction rate through a high-temperature thermal decomposition method, the surfactant includes oleic acid and oleylamine, the octahedral superparamagnetic ferroferric oxide nanoparticle is coated with an amphiphilic polymer, the amphiphilic polymer includes polymaleic anhydride-1-octadecenoic acid and polystyrene maleic anhydride copolymer, and the outer layer of the amphiphilic polymer includes biological membranes such as macrophage membranes, red blood cell membranes, neutrophil membranes and tumor cell membranes according to biological application requirements. The surface of the octahedral magnetic particle is a crystal face, the crystal face has low spin disorder and low anisotropy, so that the octahedral magnetic particle has the advantages of low coercivity and high initial magnetic susceptibility, and thus becomes a high-sensitivity magnetic particle imaging tracer.

The application relates to a preparation method of a composite hydrogen-induced color change film and relates to a preparation method of a color change film. In order to solve the problems of high cost and complex process of existing magnetron sputtering, plasma vapor deposition and other methods and equipment, sol and ZnO sol are prepared by adopting a sol-gel method; mixed sol is uniformly attached to the surface of a glass substrate by adopting a pulling and dipping method; and a composite hydrogen-induced color change film is prepared by adopting a thermal decomposition method and loading a catalyst. The application explores the optimal addition amount of ZnO and the optimal heat treatment temperature, and improves the response rate of the composite film to hydrogen. A catalyst loading method based on the thermal decomposition method is provided. The composite film has a fast response rate to hydrogen, good reversibility, obvious color difference before and after color change, can rapidly and accurately detect hydrogen leakage in the environment, and has a wide prospect in the field of hydrogen leakage detection. The application belongs to the technical field of hydrogen leakage detection.

The present application relates to a kind of crystalline cobalt antimonate coating titanium electrode and its preparation method.The electrode active coating component is crystalline CoSb2O6, and Co and Sb element are uniformly distributed in active coating.The electrode is without noble metal such as Ru and Ir, and cost is far lower than classic TiO2-RuO2 coating titanium electrode.The electrode can achieve good chlorine evolution activity under low chloride ion concentration, and chlorine evolution activity is slightly lower than TiO2-RuO2 electrode, and service life is superior to TiO2-RuO2 electrode.In the field of on-site electrochemical treatment of wastewater, it has wide application prospect.The present application also provides the preparation method of cobalt antimonate coating titanium electrode, precursor solution is prepared by ethylene glycol-citric acid sol-gel method, electrode is coated by dip-coating plating film method, and finally electrode is prepared by thermal decomposition method.The present application is simple in process, low in cost, and suitable for large-scale production.

The application discloses a preparation method of nanocrystal@conductive polymer superlattice, and single-dispersed oleic acid-coated metal oxide nanocrystals are obtained through a thermal decomposition method; a polymerizable ligand exchange strategy is adopted to obtain oleic acid / polymerizable ligand co-coated colloidal nanocrystals; then solvent evaporation-induced assembly is carried out to obtain double-ligand co-coated nanocrystal superlattice; finally, an in-situ oxidation polymerization strategy is adopted to obtain nanocrystal@conductive polymer superlattice. The method has certain universality, and the doping level and type of the nanocrystal@conductive polymer superlattice can be controlled by changing the content and type of polymerizable monomers. Based on the characteristics of the nanocrystal@conductive polymer superlattice material, such as three-dimensional cross-linked polymer conductive network structure and highly ordered and densely packed active center, the application has wide application prospects in the fields of electrochemical energy storage and electrocatalysis.

The application discloses a kind of loaded manganese doped ceria nanoscale enzyme's Pachyman hydrogel and its preparation method and application, it is related to biomedical technical field.The preparation method is first prepared by high-temperature thermal decomposition method fat-soluble manganese doped ceria nanoscale enzyme, then it is surface-modified using distearoyl phosphatidyl ethanolamine to obtain water-soluble nanoscale enzyme;Polyvinyl alcohol solution is mixed uniformly with Pachyman powder, water-soluble nanoscale enzyme, borax solution is added to crosslink and form hydrogel, after freeze-room temperature processing alternately, it is obtained.The energy storage modulus of the prepared hydrogel is 120-350 Pa at pH 6.5-7.2, 37 ℃, and the adhesion is greater than or equal to 8.5 kPa.The hydrogel prepared by the application has good biocompatibility, can efficiently remove active oxygen, relieve intestinal oxidative stress, and has suitable adhesion and degradation characteristics, can be administered by enema, and be used for preparing drugs for treating irritable bowel syndrome.

A thermal decomposition apparatus includes a heating zone, a cooling zone, a first conveying mechanism and a second conveying mechanism. The heating zone has a first space, a first inlet and a first outlet. The first inlet and the first outlet are located at two opposite sides of the first space. The cooling zone has a second space, a second inlet and a second outlet. The second inlet is selectively in space communication connection with the first outlet of the heating zone. The first conveying mechanism is at least partially disposed in the first space. The second conveying mechanism includes a carrier disposed in the second space. The carrier has an inclined surface. A position of the inclined surface located close to the second inlet is higher than a position of the inclined surface located close to the second outlet along a gravity direction.

The application discloses a method for detecting rhodamine B by using solvent-induced fluorescence enhancement. The method synthesizes up-conversion nanoparticles NaYF4:20%Yb,2%Er@NaYF4:30%Nd (UCNPs) with small particle size, uniform size and good water solubility by a thermal decomposition method, and the up-conversion nanoparticles can emit 541 nm fluorescence under the excitation of 808 nm light and the fluorescence is absorbed by rhodamine B. A simple, stable, rapid and high-sensitivity method for detecting rhodamine B based on fluorescence enhancement of the up-conversion nanoparticles is established by changing the medium environment of the UCNPs by using a mixed solvent of N,N dimethylformamide and water. The method is simple in operation, high in selectivity and fast in response speed, and is successfully applied to tomato sauce actual samples.