Patent Number: 8,796,908

Title: Piezoelectric body, ultrasound transducer, medical ultrasound diagnostic system, and nondestructive ultrasound test system

Abstract: Disclosed is a piezoelectric body having both broad band property and improved piezoelectricity, which can be suitably used for a sensor, an actuator, an ultrasound transducer and the like. The piezoelectric body is featured in that (a) it comprises a laminate structure which is represented by the following general formula, General formula G.sub.2MX.sub.4 wherein G represents an organic onium, M represents an element of Group IV or a transition metal, and X represents Cl, Br or I, the organic onium G and an inorganic phase MX.sub.4 being alternately superposed on each other in the form of layers; or in that (b) it comprises a composite of a graphene structure and a perovskite structure, the graphene structure being composed of aggregate particles with an average particle size of not more than 200 nm.

Inventors: Okuba; Tsuyoshi (Tokyo, JP)

Assignee: Konica Minolta Medical & Graphic, Inc.

International Classification: H01L 41/18 (20060101)

Expiration Date: 8/05/12018