期刊
ADVANCES IN APPLIED CERAMICS
卷 115, 期 2, 页码 66-71出版社
TAYLOR & FRANCIS LTD
DOI: 10.1179/1743676115Y.0000000040
关键词
Porous ceramic; Lead zirconate titanate; Acoustic properties; Piezoelectric properties
资金
- Slovenian Research Agency [P2-0105, PR-04362]
We studied the effect of porosity and pore morphology on the functional properties of Pb(Zr0.53Ti0.47)O-3 (PZT) ceramics for application in high frequency ultrasound transducers. By sintering a powder mixture of PZT and polymethylmetacrylate spherical particles (1.5 and 10 mu m) at 1080 degrees C, we prepared ceramics with similar to 30% porosity with interconnected micrometer sized pores and with predominantly similar to 8 mu m spherical pores. The acoustic impedance was similar to 15 MRa for both samples, which was lower than for the dense PZT. The attenuation coefficient alpha (at 2.25 MHz) was higher for ceramics with similar to 8 mu m pores (0.96 dB mu m(-1) MHz(-1)), in comparison to the ceramic with smaller pores (0.56 dB mu m(-1) MHz(-1)). The high alpha value enables the miniaturisation of the transducer, which is crucial for medical imaging probes. The dielectric and piezoelectric coefficients, polarisation, and strain response decreased with increased porosity and decreased pore/grain size. We suggest a possible role of pore/grain size on the switching behaviour.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据