81 results about "Degree of order" patented technology

The invention discloses a preparation method for porous graphitized hard carbon for a high-rate sodium ion battery cathode. The preparation method mainly comprises the following steps: at first, performing interlinking reaction on sodium alginate and a cation of a polyvalent transition metal with a catalytic graphitization effect; then preparing a nanometal / carbon composite material by use of a carbonization catalytic graphitization method; finally removing nanometal catalyst particles by use of an acid washing process to obtain a graphitized hard carbon cathode material of a relatively ordered nano-mesoporous structure. According to the preparation method, uniform nanopores are introduced into the hard carbon by use of interlinking and acid washing methods, and the degree of order of a graphene layer of mesoporous surface carbon is improved by use of an in-situ catalytic graphitization method, so that the prepared porous graphitized hard carbon material is endowed with good pore channels, high electrical conductivity and high-capacity and high-rate sodium storage property and is more favorable for rapid introduction / removal of sodium ions and electrons.

The invention aims at providing a short-process efficient cold-rolling preparation method of a high-silicon steel thin strip. The preparation method is characterized in that the high-silicon steel thin strip is prepared by using a rapid solidification method, and the thickness of the high-silicon steel thin strip is reduced by using a cold rolling method, the surface quality is improved, and the high-frequency magnetic performance is improved; due to rapid solidification, the plasticity of high-silicon steel can be improved, and the thin strip with certain plasticity is obtained and can be wound into a coil; then, cold rolling is carried out, so that the degree of order of the high-silicon steel is further lowered, the plasticity of the high-silicon steel is improved, and a high-silicon steel thin strip coil is obtained; the thin strip obtained through rapid solidification has the advantages that the crystal grain size is obviously reduced, the degree of order is obviously lowered, and the microhardness change is not great, so that next-step cold rolling is facilitated; during cold rolling, the rolling reduction of first-time rolling is controlled, and then, the plasticity is further improved, so that the thin strip with the thinnest thickness of 0.02mm can be obtained. According to the preparation method, the production efficiency of the prepared high-silicon steel thin strip is high, and the product quality of the prepared high-silicon steel thin strip is good, so that the method can be widely implemented industrially and accordingly has a broad application prospect.

The invention relates to a synthetic method of organic functional mesoporous silicon oxide. The method comprises the steps of coupling an organic functional group to ordered mesoporous silicon oxide through a copolymerization method in one step in an acidic condition to obtain the organic functional mesoporous silicon oxide, the functional degree of which is far greater than the grafting rate of a conventional copolymerization method, by taking triethoxy silane and tri alkoxy organic silane coupling agents as a silicon source and a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) as a surfactant. In a reaction process, by controlling the proportion of adding amount of the organic silane coupling agent and triethoxy silane, the functional degree of the mesoporous silicon oxide and the degree of order of ducts can be regulated.

The invention discloses a preparation method of an L10-FePt granular film, relating to a method for preparing an L10-FePt granular film with high degree of order by preannealing in a magnetic field, which has the advantages of lowering the ordering temperature of a FePt granular film, promoting the growth of tissues of the L10-FePt granular film (001) and improving the magnetic property and comprises the following steps of: firstly, preparing a FeAg nano film on a substrate at room temperature by using a DC magnetic control sputtering method; secondly, placing the FeAg nano film prepared in the first step into the magnetic field and carrying out vacuum annealing to obtain an annealed FeAg nano film; and thirdly, depositing the annealed FeAg nano film obtained in the second step at room temperature by DC magnetic control sputtering to form a Pt layer, and then carrying out vacuum annealing without any magnetic field to obtain the L10-FePt / Ag film. With the method provided by the invention, the high-performance L10-FePt / Ag film with high degree of order, small crystallite size and small magnetic mutual effects among crystalline grains can be formed on any substrate.