Preparing method of lead-free piezoelectric ceramics for low temperature sintering with excellent electric field induced strain property

摘要

The present invention relates to a method for manufacturing low-temperature sintered lead-free piezoelectric ceramics having excellent field-organic deformation characteristics, and more particularly, to a low-temperature sintered lead-free piezoelectric ceramic composition having excellent field-organic deformation characteristics represented by the following general formula (1). [Formula 1] (1-x) Bi _0.5 (Na _(1-y) K _y ) TiO ₃ -x Illite In Formula 1, x is a real number of 0.01 ≤ x ≤ 0.05, y is a real number of 0.15 ≤ y ≤ 0.25. The low temperature sintered lead-free piezoelectric ceramics manufacturing method having excellent field organic deformation characteristics according to the present invention provides a bismuth (Bi) -based piezoelectric ceramic material, unlike conventional lead-based PZT ceramic materials that are harmful to a human body and cause environmental pollution. Therefore, by producing an unleaded piezoelectric ceramic by mixing illite with a bismuth (Bi) -based BNKT-based ceramic material, it is possible to provide piezoelectric ceramics having high electric field organic strain even at low temperatures.