2results about How to "Change internal structure" patented technology

This invention relates to the field of microwave absorbing materials technology, specifically to an iron-cobalt alloy carbon magnetoelectric composite microwave absorbing material, its preparation method, and its applications. The specific preparation method includes the following steps: using potassium ferricyanide as the carbon and nitrogen source, a co-precipitation reaction is carried out with a Co source and sodium citrate in a solvent system to prepare a Prussian blue analog; then, under a protective atmosphere, the Prussian blue analog is pyrolyzed at 400–600℃, causing Co nanoparticles to be loaded onto the surface of a carbon-nitrogen matrix, resulting in the iron-cobalt alloy carbon magnetoelectric composite microwave absorbing material. This invention mainly uses the C≡N groups in the metal coordination bonds as the carbon and nitrogen sources, and Co nanoparticles as magnetic particles. By controlling the pyrolysis temperature, the microstructure and internal structure of the product are altered, thereby controlling the electromagnetic parameters of the material and obtaining an absorbing material with good impedance matching and attenuation performance.

The utility model relates to bearing processing technical field, concretely is a kind of positioning tool for bearing processing, it includes: disc body, including three-jaw chuck, the surface of three-jaw chuck is provided with locating dog; positioning mechanism, including locating knob, the surface of three-jaw chuck is rotatably connected in locating knob.The utility model is connected through locating knob and worm, rotates locating knob and drives worm rotation, to drive worm gear to rotate on the surface of fixed shaft, then through the connection of worm gear and connecting threaded rod, the action position of adjusting block can be adjusted by connecting threaded rod, through the connection of adjusting block and hinge lever, the movable block can be moved to the side away from adjusting block by hinge lever with the movement of adjusting block, then through the connection of movable block and locating dog, the radial positioning of bearing can be carried out, to change the internal structure of positioning mechanism in this way, reach the effect of improving the service life of three-jaw chuck.