Patent ID: 11968904
Assignee: CITY UNIVERSITY OF HONG KONG
Field: nan (nan)
Classification: CPC H | IPC H

Claim 9:
10. A method of fabricating the flexible piezoelectric composite of the claim 1, the method comprising:
providing a sol solution of piezoelectric element;
providing surface-modified piezoelectric element powders;
mixing the sol solution and the surface-modified piezoelectric element powders in a ratio such that a well-dispersed suspension of piezoelectric element mixture is obtained;
adding the well-dispersed suspension of piezoelectric element mixture dropwise to a porous organic template selected from wood, paper, textile, bamboo, or any organic template having a relatively permittivity of 500 to 7,000 and average pore size of about 10 to 300 μm until the porous organic template is substantially immersed into the suspension of piezoelectric element mixture;
drying the suspension such that the sol immersed into the pores of the organic template is converted into a gel;
sintering the dried organic template dispersed with the piezoelectric element to obtain a three-dimensional interconnected piezoelectric-ceramic framework;
providing and adding a solution of polyvinylidene fluoride on the three-dimensional interconnected piezoelectric-ceramic framework followed by drying to form a coating of polyvinylidene fluoride on the framework;
providing a solution of polydimethylsiloxane and adding thereof on the surface of the polyvinylidene fluoride-coated three-dimensional interconnected piezoelectric-ceramic framework until the three-dimensional interconnected piezoelectric-ceramic framework is fully infiltrated with the solution of polydimethylsiloxane;
curing the three-dimensional interconnected piezoelectric-ceramic framework fully infiltrated with the solution of polydimethylsiloxane to obtain a piezoelectric ceramic-polymer composite.