PIEZOELECTRIC SINGLE CRYSTAL, ULTRASONIC PROBE AND ARRAYED ULTRASONIC PROBE

摘要

PURPOSE: To obtain a ultrasonic probe in narrow width, large electric and mechanical coupling coefficient, easily matchable with a transmitting and receiving circuit capable of enhancing the sensitivity by a method wherein piezoelectric elements are formed of a single crystal substantially represented by a specific formula. ;CONSTITUTION: Plural piezoelectric elements 1 comprising piezoelectric single crystal are separated from one another to be bonded onto a packing member 2, The piezoelectric elements 1 in strip type assuming the second wider surface as an ultrasonic wave transmitting and receiving surface in the arrow A direction to be formed of a single crystal substantially represented by a right-hand formula where M1, M2 respectively represent at least one metal selected from Zn, Ni and Mg as well as from Pt, Fe, Bi, Rh and Ir while x, y and z are specified respectively as 0.05≤x≤0.2, 0.0001≤y≤0.01, 0≤z≤0.1. Through these procedures, the strip type piezoelectric element in large electric and mechanical coupling coefficient can be obtained.;COPYRIGHT: (C)1995,JPO