4results about How to "Stable and controllable performance" patented technology

The invention discloses a method for preparing a high-performance C17510 copper alloy strip, and belongs to the technical field of copper alloys. The method comprises the steps that raw materials are prepared according to the components and the mass percent of the C17510 copper alloy, and the prepared raw materials are added into a vacuum induction melting furnace in batches for vacuum induction melting; a two-stage cooling temperature control casting mold continuous casting technology is adopted, and the obtained melt is poured into a casting blank at the speed of 35-45 mm / min; the casting blank is heated to 900-930 DEG C, heat preservation is conducted for 8-20 h, then hot rolling is conducted, and a hot-rolled strip is obtained; and the hot-rolled strip is sequentially subjected to primary cold rolling, continuous solution treatment, secondary cold rolling and aging treatment. According to the method, high uniformity of alloy components is achieved, and the stability and uniformity of the mechanical property of the strip are remarkably improved.

The utility model discloses a production system for continuously preparing a multi-component aramid copolymer, which belongs to the technical field of multi-component aramid preparation devices and comprises a premixing kettle, a continuous reactor and a double-screw reactor which are sequentially connected, the double-screw reactor is connected with a neutralizing tank I through a pipeline I, and an outlet of the neutralizing tank I is sequentially connected with a washing machine and a drying machine; the double-screw reactor is connected with a neutralizing tank II through a pipeline II, an outlet of the neutralizing tank II is sequentially connected with a defoaming kettle, a filter and a spinning solution storage tank, a heat exchanger I is arranged on a pipeline between the premixing kettle and the continuous reactor, and a heat exchanger II is arranged on a pipeline between the continuous reactor and the double-screw reactor. The front end of the continuous reactor and the front end of the double-screw reactor are both connected with a terephthaloyl chloride supply pipeline, the premixing kettle is connected with an auxiliary pipeline and a monomer supply pipeline, the production system provides matched production equipment for continuous preparation of the multi-component aramid copolymer, and stable, continuous, efficient and large-scale production of the multi-component aramid copolymer is guaranteed.

The application discloses an SST solid-state transformer magnetic core and a preparation method thereof. The SST solid-state transformer magnetic core comprises an iron-based nanocrystalline strip substrate, and the front and back surfaces of the iron-based nanocrystalline strip substrate are provided with dense SiO2 insulation coating layers, and the thickness of the SiO2 insulation coating layers is 0.2-1.4 microns. The iron-based nanocrystalline magnetic core has low-frequency magnetic properties, and meanwhile, the full-frequency performance of the magnetic core after cutting can be stably controlled.

The application discloses a kind of catalysts for microwave-driven methanol-water reforming hydrogen production.The catalyst is composite catalyst obtained by CuO / ZnO composite oxide active component being supported on the surface of microwave absorption component, and the microwave absorption component is carbon nanotube or mixture of carbon nanotube and graphite;The mass of microwave absorption component accounts for 10-40wt.% of the mass of the entire catalyst;It is prepared by impregnation loading method.The application uses carbon with appropriate graphitization degree and specific surface area as carrier and as microwave absorption material at the same time, and loading copper-zinc oxide shows excellent wave-absorbing performance and methanol / water reforming reaction performance, and the preparation process is simple, when applied to microwave-driven methanol / water reforming hydrogen production, methanol can be converted to nearly 100% under the condition of using lower molar ratio of methanol / water raw material, and the H2 content in reforming gas product is about 70mol.%, and the CO content is less than 1mol.%.