3results about How to "No microcracks" patented technology

The utility model relates to the technical field of low-voltage switches, and particularly discloses a direct-current contactor shell and a direct-current contactor, the direct-current contactor shell comprises a transparent glass shell, the transparent glass shell is provided with an internal cavity capable of accommodating a moving contact system, the transparent glass shell is provided with a mounting hole, and the transparent glass shell is provided with a binding post arranged in the mounting hole in a penetrating manner; kovar sealing sleeves for sealing are arranged between the mounting holes and the binding posts; the kovar sealing sleeve is sleeved on the outer side wall of the binding post, and the inner side surface of the kovar sealing sleeve is attached to the outer side wall of the binding post; the outer side face of the Kovar sealing sleeve is attached to the inner wall of the mounting hole. The high-temperature-resistant and high-pressure-resistant cable is convenient to produce and has good gas tightness and excellent high-temperature-resistant performance, meanwhile, hydrogen can be used as protective gas, and the arc blocking performance can be improved conveniently.

The invention discloses corrosion aluminum powder and a preparation method and application thereof, and the preparation method comprises the following steps: S1, carrying out plasma passivation treatment on aluminum powder to obtain surface modified aluminum powder with an amorphous aluminum oxide layer; and S2, carrying out surface micro-corrosion on the surface modified aluminum powder, and then drying and grading to obtain the corroded aluminum powder. The method comprises the following steps: forming an amorphous aluminum oxide layer on the surface of aluminum powder; and then micro-corrosion is carried out on the amorphous aluminum oxide layer, a rich pore structure is formed on the amorphous aluminum oxide layer, and after corrosion is completed, the amorphous aluminum oxide layer can be automatically formed on the corrosion surface again. The surface of the obtained corrosion aluminum powder is completely wrapped by the amorphous aluminum oxide layer, so that the leakage current can be greatly reduced, and the electrochemical stability of the anode foil is greatly improved; the porous carbon has certain roughness and rich pore structures, and the specific surface area and the specific volume are greatly increased; the micro-corrosion has no negative influence on the mechanical strength of the aluminum powder, and ensures that no micro-crack appears on the surface of the anode foil.

This invention relates to a one-step method for synthesizing flake-like Ba3(VO4)2. The method includes the following steps: mixing an alkali source, a vanadium source, a barium source, and water, and stirring the mixture. The alkali source accounts for 5-20 wt% of the water mass. After the stirring reaction, solid-liquid separation is performed to obtain flake-like Ba3(VO4)2 and a filtrate. The method provided by this invention eliminates the need for high-temperature calcination and precise pH control, enabling the direct and efficient synthesis of highly crystalline and uniformly morphologically uniform flake-like Ba3(VO4)2 under mild conditions. This significantly reduces production costs and process complexity, and the production process is more economical and cleaner.