Patent ID: 8715575

Claim:
A free standing film that is substantially lead-free, wherein the free standing film is produced from a lead-free piezoelectric material selected from the group consisting of solid solutions comprising one or more of (Bi 0.5 K 0.5 )TiO 3 , (Bi 0.5 Na 0.5 )TiO 3 , Ba(Zr x Ti 1-x )O 3 , BaTiO 3 , (Bi 1/2 K 1/2 )TiO 3 , (Bi 1/2 Na 1/2 )TiO 3 , Ba(Zr x Ti 1-x )O 3 , Bi(Zn 1/2 Ti 1/2 )O 3 , (Na x K 1-x )NbO 3 , BiScO 3 —PbTiO 3 BaTiO 3 —(Bi 1/2 K 1/2 )TiO 3 , (Bi 1/2 Na 1/2 )TiO 3 —(Bi 1/2 K 1/2 )TiO 3 , (Bi 1/2 Na 1/2 )TiO 3 —BaTiO 3 , (Bi 1/2 Na 1/2 )TiO 3 —Ba(Zr x Ti 1-x )O 3 and (Bi 1/2 Na 1/2 )TiO 3 —BaTiO 3 —(Bi 1/2 K 1/2 )TiO 3 .