A functionally graded piezoelectric material created by an internal temperature gradient

被引：20

作者：

Yamada, K ^{[1
]}

Yamazaki, D ^{[1
]}

Nakamura, K ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Elect & Commun Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 2001年 / 40卷 / 1AB期

关键词：

piezoelectric material; ultrasound transducer; broadband; high resolution; ultrasonic imaging; piezoelectrically graded material; equivalent network analysis;

D O I：

10.1143/JJAP.40.L49

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ultrasound transducers will have a broadband frequency characteristic if relevant piezoelectric parameters can be graded in the thickness direction of the plate. As is well known, piezoelectric properties will gradually fade away if the material temperature approaches the Curie point. From this viewpoint, we present in this letter a functionally graded piezoelectric material for broadband ultrasound transducers created by forming a temperature variation across a piezoelectric ceramic plate that has a relatively low Curie temperature. The distribution of the piezoelectric constant is estimated using an equivalent network model specially derived by the authors for plates with a graded piezoelectric constant.

引用

页码：L49 / L52

页数：4