PIEZOELECTRIC CERAMIC MATERIAL Russian patent published in 2012 - IPC C04B35/493 H01L41/187 

FIELD: chemistry.

SUBSTANCE: invention relates to piezoelectric ceramic materials based on lead zirconate-titanate and can be used in high-voltage actuators of laser adaptive systems, vibration dampers, object precision positioning devices (microlithography, tunnel focused-beam microscopes), as well as in fuel-distribution systems of petrol and diesel engines. The piezoelectric ceramic material based on lead zirconate-titanate contains lead, titanium, zirconium, niobium, barium, strontium, magnesium and zinc oxides, with the following ratio of components in wt %: PbO 60.33-67.02, TiO₂ 10.22-10.48, ZrO₂ 15.75-17.43, Nb₂O₅ 4.62-4.82, BaO 0.35-2.23, SrO 0.64-4.03, MgO 0.51-0.54, ZnO 0.38-0.39. The material is produced using conventional ceramic technology through double calcination of mixtures with intermediate grinding of the synthesised product.

EFFECT: achieving high values of relative permittivity of polarised samples, inverse piezoelectric modulus, electromechanical coupling factor of the planar oscillation mode and Curie point.

2 ex, 2 tbl