	US 12,256,640 B2
	Lead-free piezo composites and methods of making thereof
Soma Guhathakurta, Bangalore (IN); and Jesus Alfonso Caraveo Frescas, Thuwal (SA)
Assigned to SABIC Global Technologies B.V., Bergen Op Zoom (NL)
Appl. No. 17/593,968
Filed by SABIC Global Technologies B.V., Bergen op Zoom (NL)
PCT Filed Mar. 31, 2020, PCT No. PCT/IB2020/053052 § 371(c)(1), (2) Date Sep. 29, 2021, PCT Pub. No. WO2020/202006, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 201911013259 (IN), filed on Apr. 2, 2019.
Prior Publication US 2022/0181543 A1, Jun. 9, 2022
Int. Cl. H10N 30/092 (2023.01); C08J 3/21 (2006.01); C08J 5/18 (2006.01); C08K 3/22 (2006.01); H10N 30/045 (2023.01); H10N 30/85 (2023.01)

CPC H10N 30/092 (2023.02) [C08J 3/212 (2013.01); C08J 5/18 (2013.01); C08K 3/22 (2013.01); H10N 30/045 (2023.02); H10N 30/852 (2023.02); C08J 2327/16 (2013.01); C08K 2003/2237 (2013.01); C08K 2201/001 (2013.01); C08K 2201/005 (2013.01)]

13 Claims

1. A method of producing a lead-free piezoelectric composite, the method comprising:

(a) adding lead-free piezoelectric particles having an average particle size of 200 nm to 1000 nm in a solution comprising a PVDF terpolymer and a solvent having a boiling point ≥80° C. at 0.1 MPa and a solubility in water of ≥0.1 g/g to form a dispersion or suspension;

(b) forming a polymeric matrix having the lead-free piezoelectric particles dispersed therein; and

(c) subjecting the polymeric matrix having the lead-free piezoelectric particles dispersed therein to an electric polarization treatment.