Patent ID: 8877085

Claim:
A piezoelectric and/or pyroelectric composite solid material, called hybrid material, comprising: a solid dielectric matrix ( 11 ), an inorganic filler distributed in the solid dielectric matrix ( 11 ), said inorganic filler being composed of a material selected from the group formed of piezoelectric materials, pyroelectric materials, and piezoelectric and pyroelectric materials, said inorganic filler comprising solid nanoparticles, called filiform nanoparticles ( 12 ), having: a length extending in a main direction of elongation of the filiform nanoparticles ( 12 ), two dimensions, called orthogonal dimensions, extending in two transverse directions which are mutually orthogonal and orthogonal to said main direction of elongation of the filiform nanoparticles ( 12 ), said orthogonal dimensions being smaller than 500 nm, said length extending in a main direction of elongation being larger than said orthogonal dimensions, and two ratios, called aspect ratios, between said length and each of the two orthogonal dimensions, said aspect ratios being greater than 10, wherein, said filiform nanoparticles ( 12 ) are distributed in the volume of the solid dielectric matrix ( 11 ) in an amount by volume of less than 50%, and the main directions of elongation of the filiform nanoparticles ( 12 ) of the inorganic filler distributed in the dielectric matrix ( 11 ) have a substantially isotropic distribution in the solid dielectric matrix ( 11 ).