Curie temperature and high temperature behavior of Pb(Zr,Ti)O3/Pb(Zr,Ti)O3 sol-gel composites

被引：9

作者：

Fujimoto, Shota ^{[1
]}

Namihira, Takao ^{[2
]}

Iwata, Kazuki ^{[3
]}

Kobayashi, Makiko ^{[1
]}

机构：

[1] Kumamoto Univ, Grad Sch Sci & Technol, Kumamoto 8608555, Japan

[2] Kumamoto Univ, Inst Pulsed Power Sci, Kumamoto 8608555, Japan

[3] Kumamoto Univ, Dept Engn, Kumamoto 8608555, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2015年 / 54卷 / 07期

关键词：

ULTRASONIC TRANSDUCERS; FILMS; STRESS; SHIFT;

D O I：

10.7567/JJAP.54.07HB04

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The Curie temperature of Pb(Zr,Ti)O-3/Pb(Zr,Ti)O-3 (PZT/PZT) sol-gel composites was investigated empirically in order to determine the maximum operation temperature of PZT/PZT ultrasonic transducers. A PZT/PZT film was fabricated on a stainless steel substrate and the piezoelectric constant d(33) and ultrasonic response were measured after 1 h heating at a specified temperature in a furnace in order to investigate the Curie temperature indirectly. It was found that the Curie temperature of PZT/PZT was between 770 and 870 K. Second, real-time monitoring of the capacitance at various temperatures was attempted in order to measure the Curie temperature directly. A PZT/PZT film was fabricated on a stainless steel substrate and the sample was placed in a furnace and then heated from RT to 870 K. Peaks in the capacitance appeared around 670 and 820 K; thus, it was concluded that a Curie temperature shift of PZT/PZT occurred around 820 K, which was 250K higher than that of PZT powder made from the bulk material. The high-temperature ultrasonic performance was also monitored and clear reflected echoes were clearly observed at similar to 724 K. (C) 2015 The Japan Society of Applied Physics

引用

页数：8

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