5results about How to "Improve cracking performance" patented technology

The utility model belongs to the technical field of building engineering, specifically discloses a heavy nonferrous metal smelting engineering existing pool anticorrosive and anti -infiltration structure. The reinforced concrete bottom plate and lateral wall of structure are closed into pool, the surface of reinforced concrete bottom plate is equipped with waterproof coating, geotextile I, high density polyethylene geomembrane, geotextile II, fine stone concrete layer, epoxy glass steel isolation layer and anticorrosive surface layer in proper order, the surface of reinforced concrete lateral wall is equipped with waterproof coating, geotextile I, high density polyethylene geomembrane, geotextile II, polymer cement mortar layer, epoxy glass steel isolation layer and anticorrosive surface layer in proper order, the layer of aforementioned same name of reinforced concrete bottom plate and lateral wall surface, geotextile and geomembrane correspond to head -tail link, and fine stone concrete layer and polymer cement mortar layer correspond to head -tail link. The utility model has the characteristics of simple structure, convenient construction, good anticorrosive and anti -infiltration performance and low cost.

The invention provides lithium manganese iron phosphate composite positive electrode slurry and a preparation method thereof, a lithium manganese iron phosphate composite positive plate and a lithium ion battery, and belongs to the technical field of battery materials. The lithium iron phosphate composite positive electrode slurry is mainly prepared from an active substance, a conductive agent, a binder, a dispersant and a solvent, wherein the active substance is formed by doping a small proportion of ternary material into lithium manganese iron phosphate, so that the effect of doping large and small particles can be achieved, the agglomeration of the lithium manganese iron phosphate is avoided, and the problems that the homogenate is easy to gel and the solid content is low are solved; the binder is compounded by two PVDF binders with different molecular weights, so that the problems of poor cohesiveness of single low-molecular-weight PVDF and poor gel resistance of single high-molecular-weight PVDF can be improved, the viscosity rebound of the positive electrode slurry is avoided, and the problems of poor stripping force of the pole piece and coating cracking of the pole piece can be effectively improved; the dispersing agent with specific groups and structures is adopted, so that the problems of slurry gel and pole piece cracking can be improved, and the flexibility of the pole piece is further improved.

The invention discloses an alkali-active red mud-based nanosphere modified fiber and a preparation method and application thereof, non-agglomerated spherical nanoparticles grow on the surface of the modified fiber, and the modified fiber is prepared from the following raw materials: red mud, slag, fly ash, an alkali activator and fiber in a mass ratio of (70-100): (10-30): (10-30): (40-60): (26-30). The red mud is activated by utilizing an exciting agent, the PVA fiber is soaked after the mineral admixture is doped, the alkali-active red mud-based nanospheres grow on the surface of the PVA fiber, and the nanospheres are rich in Ca, Al, Si and other elements, so that the nanospheres can be used for regulating and controlling the interface performance of the high-ductility concrete fiber-matrix; according to the method, the fibers do not need to be coated with multiple layers of materials, the interface performance of the fibers and the matrix can be regulated and controlled, the fibers cannot be damaged, a new thought is provided for resource utilization of the red mud, and the method has the advantages of being low in carbon emission, low in production cost, wide in raw material range, simple in preparation method and the like.

A plastic package cable assembly comprises a plastic package body, a connector and a cable, the connector is provided with an insulating shell and a contact piece installed in the insulating shell, the contact piece is electrically connected with the cable, an annular groove is formed in the periphery of the tail of the insulating shell in the circumferential direction, one end of the plastic package body is combined and clamped into the annular groove in a plastic package mode and wraps the tail of the insulating shell, and the other end of the plastic package body is connected with the cable. And the other end of the plastic package body is fixedly connected with the cable plastic package. The connector tail sleeve and the glue pouring structure are replaced by the plastic package body, one end of the plastic package body is clamped into the annular groove in an injection molding mode, the other end of the plastic package body is connected with the cable in a plastic package mode, the binding force is high, the sealing effect is achieved, and the sealing performance stability is high.

The application discloses a method for preparing rare earth doped quartz glass by composite acid catalyzed sol-gel, comprising the following steps: mixing tetraethyl orthosilicate, ethanol and deionized water, and adding HCl and HF to make the tetraethyl orthosilicate hydrolyze and polycondensate to form an initial silicon-oxygen network; adding an aluminum salt precursor and a rare earth salt precursor into the obtained system to obtain a doped silica sol, making the doped silica sol gelate and performing aging treatment; performing stage drying on the obtained whole wet gel to obtain a whole dry gel; performing stage heat treatment on the whole dry gel to obtain a porous precursor which maintains a whole form; and directly placing the porous precursor under low-pressure high-temperature conditions for densification treatment without performing powderization, grinding, powder pressing or re-molding to obtain transparent rare earth doped quartz glass. The application does not need powderization and secondary melting, and is suitable for preparation of rare earth doped quartz glass and optical fiber preform materials.