Patent ID: 7467448

Claim:
A method of manufacturing a piezoelectric ceramic, comprising the steps of: mixing and melting Li 2 O and B 2 O 3 in a ratio of 1:2; flat-quenching the mixture to make amorphous Li 2 B 4 O 7 ; depositing gold on both surfaces of the amorphous Li 2 B 4 O 7 by a sputtering process, the gold used as an electrode; applying the amorphous Li 2 B 4 O 7 with an electric field of a range from 0.1 V/mm to 10 V/mm at a frequency of 1 to 50 Hz; and heating the amorphous Li 2 B 4 O 7 within an electric furnace of above 450° C., to crystallize the amorphous Li 2 B 4 O 7 .