▎ 摘　　要

NOVELTY - A piezoelectric plate has a prepreg and a premixed compound which are superposed on each other. The thickness of prepreg is 0.4-0.6 mm. The premixed compound is brushed and hot pressed on the surface of the prepreg layer, and has thickness of 0.1-0.2 mm. The prepreg is carbon fiber prepreg of surface-sprayed alkylated graphene, and has size of 700-1000x 90-120 mm. The premixed compound is made of mixture containing polarized piezoelectric ceramic powder, epoxy resin and acetone in the mass ratio of 1:2-3:2-4. USE - Piezoelectric plate is used for piezoelectric power generation surface. ADVANTAGE - The piezoelectric plate has high strength and energy conversion efficiency, and excellent durability, electroconductivity and power generation effect, and controllable graphene content, and is manufactured efficiently by simple method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of piezoelectric plate. Epoxy resin is heated, melted and mixed with acetone to prepare glue. The obtained glue is added to glue tank of the film machine, and impregnated in carbon fiber to obtain carbon fiber prepreg. Alkylated graphene is added to an organic solvent, and ultrasonically processed to obtain liquid mixture. The resultant liquid mixture is then placed in a planetary ball mill and mixed to obtain homogeneous suspension. The obtained suspension is placed in a syringe of an electrostatic spray device, and injector nozzle is connected to positive pole of high voltage electric field. The carbon fiber prepreg as negative receiver of electrostatic spray device, is cut, and the syringe is pushed. The alkylated graphene is uniformly sprayed onto the surface of the carbon fiber prepreg, to obtain carbon fiber prepreg of surface-sprayed alkylated graphene. The polarized piezoelectric ceramic powder, epoxy resin and acetone are mixed and ultrasonically dispersed to obtain premixed compound. The carbon fiber prepreg of surface-sprayed alkylene is placed in a mold, and premixed rubber is applied. The resultant material is placed in a hot press, heated, pressurized, and cooled to obtain piezoelectric plate.