▎ 摘　　要

NOVELTY - The method involves putting ethyl cellulose, alumina nanoparticles (3) and alumina nanofibers (4) into absolute ethanol and heat and stir. A uniform slurry is obtained. The slurry is put into a fixed alumina ceramic model. The folding electrodes are placed and fixed at both ends. The alumina ceramic model filled with slurry is put into the muffle furnace. Anneal in an air atmosphere and cool to room temperature naturally to obtain the functional area of alumina-based hydroelectric generator. The functional area of alumina-based hydroelectric generator is taken out. Except for the top and bottom ends, a sealing layer (5) is applied around the functional area. USE - Preparation method of alumina-based hydroelectric generator functional area. ADVANTAGE - The structure is less restricted, which overcomes the limitation of evaporation and capillary force. The efficiency of charge collection is improved greatly. The reinforced concrete structure of nanofibers and nanoparticles makes the mechanical properties of the hydroelectric generator functional area excellent. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of preparation method of alumina-based hydroelectric generator functional area. Water inlet area (1) Folded electrode (2) Alumina nanoparticles (3) Alumina nanofiber (4) Sealing layer (5)