Abstract: A water treatment device based on micro-nano bubble technology includes the micro-nano bubble generation device and the sewage tank, the sewage tank is also installed with water surface sewage collection mechanism and water surface sewage cleaning mechanism, the water surface sewage collection mechanism includes the pushing plate and the first transmission component, the pushing plate and the sewage tank are slidingly connected, and the pushing plate is also fixedly connected to the limit connecting rod, the water surface sewage cleaning mechanism includes the cleaning sieve plate and the sewage collecting box, and the cleaning sieve plate is vertically arranged inside the sewage tank, and the sewage tank is fixedly connected with the hinged table, the hinged table is connected with the first rotating shaft and the rear wall of the sewage tank is also equipped with the second transmission component.

Abstract: The present disclosure discloses a nano-lanthanum oxide reinforced tungsten-based composite material and a preparation method thereof. A pure tungsten powder and a nano-lanthanum oxide powder are mixed to obtain a mixed powder, and in the mixed powder, the nano-lanthanum oxide powder accounts for 0.5-2% of the mixed powder by mass percent; and then, 3D printing forming is conducted on the mixed powder to obtain a bulk material of the nano-lanthanum oxide reinforced tungsten-based composite material. The nano-lanthanum oxide reinforced tungsten-based composite material of the present disclosure has excellent mechanical properties.