Improved growth of large lead zinc niobate titanate piezoelectric single crystals for medical ultrasonic transducers

被引：150

作者：

Kobayashi, T

Shimanuki, S

Saitoh, S

Yamashita, Y

机构：

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1997年 / 36卷 / 9B期

关键词：

single crystal; flux growth; perovskite; lead zinc niobate; lead titanate; relaxor; dielectric constant; Curie temperature; electromechanical coupling factor; ultrasonic transducer; inclusion;

D O I：

10.1143/JJAP.36.6035

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Large piezoelectric single crystals of the Pb[(Zn1/3Nb2/3)(0.91)Ti-0.09]O-3 (PZN-PT) binary system have been successfully obtained using a conventional flux method and a suitable ratio of PZN-PT: PbO flux. The largest crystal had dimensions of 43x42x40 mm and weighed 415g. In order to improve growth behavior and reduce the number of nuclei, the temperature gradient program of the crucible was optimized; that is, the bottom of the crucible was made cooler (>50 degrees C) than the top during cooling. A charged composition of 45 mol% PZN-PT and 55 mol% PbO showed good growth results. A large bar-mode electromechanical coupling factor, k(33)', (84%) for phased array ultrasonic transducers was obtained. This confirms that large PZN-PT single crystals for phased-array ultrasonic transducers can be grown using a flux method.

引用

页码：6035 / 6038

页数：4

共 6 条

[1]

BOKOV VA, 1961, FIZ TVERD TELA, V3, P613

[2] DIELECTRIC AND PIEZOELECTRIC PROPERTIES OF 0.91PB(ZN1/3NB2/3)O3-0.09PBTIO3 SINGLE-CRYSTALS [J].