Patent ID: 7387745
Filing Date: 2008-06-17
Classification: C04B,H01L

Abstract:
1. A piezoelectric ceramic material comprising lead zirconate titanate (PZT) having the formula Pb 2+ (Zr 4+ ,Ti 4+ )O 3 2− and the crystal structure of perovskite having the formula A 2+ B 4+ O 3 2− , characterized by substitution of partially valence compensating acceptor and donor ion pairs B 3+ y /B 5+ z for the formation of only partially valence compensated compositions of the system Pb wherein w=0.00 to 0.005, x=0.50 to 0.55, y<z, and z=0.00 to 0.05, wherein a coupled substitution of heterovalent acceptor and donor ions at Zr/Ti sites is present in the material and the B