Patent ID: 11486055

Abstract:
A relaxor-PT based piezoelectric crystal is disclosed, comprising the general formula of (Pb1-1.5xMx){[(MI,MII)1-z(MI′,MII′)z]1-yTiy}O3, wherein: M is a rare earth cation; MI is selected from the group consisting of Mg2+, Zn2+, Yb3+, Sc3+, and In3+; MII is Nb5+; MI′ is selected from the group consisting of Mg2+, Zn2+, Yb3+, Sc3+, In3+, and Zr4; MII′ is Nb5+ or Zr4+; 0<x≤0.05; 0.02<y<0.7; and 0≤z≤1, provided that if either MI′ or MII′ is Zr4+, both MI′ and MII′ are Zr4+. A method for forming the relaxor-PT based piezoelectric crystal is disclosed, comprising pre-synthesizing precursor materials by calcining mixed oxides, mixing the precursor materials with single oxides and calcining to form a feeding material, and growing the relaxor-PT based piezoelectric crystal having the general formula of (Pb1-1.5xMx){[(MI,MII)1-z(MI′,MII′)z]1-yTiy}O3 from the feeding material by a Bridgman method.