Patent ID: 7908722

Claim:
A method for preparation of a single crystal element, comprising the steps of: providing a single crystal element; said single crystal element being a piezoelectric crystal element with a cutting direction along zxt±45°; said single crystal element providing a PbZ y (Mg 1/2 Nb 2/3 ) 1-x-y Ti x O 3 ; wherein Y is defined as from 0 to 0.10, X is defined as 0.20 to 0.35, and Z is defined as at least one doped element selected from the group consisting of: Zr, Hf, Sn, In, Sc, Tm, Nb, Ta, Zn, Yb, Lu, Sb, Bi, Mn, Ga, Ce, Ni, W, Cu, Fe, K, Na, Li, and Ba; mechanically finishing said single crystal with cuttings along zxt±45°; coating electrodes on a pair of Z surfaces; poling said single crystal element to a first poled state in the direction along <011> cubic axis under a 500V/mm electrical field at room temperature and forming a poled single crystal element; and providing said poled single crystal element with an operable d 36 shear mode and having a d 36 value up to about 2600 pC/N at room temperature.