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3–3型与1–3型多孔锆钛酸铅陶瓷的结构和性能
作者:郭瑞 汪长安 杨安坤 
单位:清华大学材料科学与工程系 北京 100084 
关键词:多孔锆钛酸铅 1–3型多孔结构 压电系数 介电常数 
分类号:TQ174;O482.3
出版年,卷(期):页码:2011,39(11):68-74
DOI:
摘要:

以叔丁醇为溶剂和成孔模板,采用冷冻–干燥工艺制备1–3型多孔锆钛酸铅(lead zirconate titanate,PZT)陶瓷,采用凝胶注模工艺制备3–3型多孔PZT陶瓷,利用扫描电子显微镜和压汞仪对多孔陶瓷的形貌和孔径分布进行表征,利用阻抗分析仪测试多孔陶瓷的介电常数,利用Piezo–meter system测量仪测试样品的压电性能。结果表明:相比于3–3型多孔PZT陶瓷,在初始浆料固含量相同的条件下,1–3型多孔PZT陶瓷具有更高的气孔率;而气孔率相当时,1–3型多孔PZT陶瓷的压电系数比3–3型样品高出20%以上,介电常数高出1倍左右,且最低的声阻抗已达到2.1 × 107 (Pa?s)/m,明显低于3–3型样品并与生物组织和水的声阻抗值非常接近。

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3–3 type porous lead zirconate titanate (PZT) ceramics were prepared by a gel-casting method and 1–3 type porous PZT ceramics were prepared by a freeze casting process with tert-butyl alcohol (TBA) as solvent and template. The microstructure was determined by scanning electron microscope and the pore-size distributions were analyzed by a mercury intrusion method. The longitude piezoelectric coefficient (d33) was measured by a Piezo–Meter System and the permittivity (ε) was measured under constant (zero) stress using an impedance bridge. Compared to 3–3 type porous PZT ceramics, the 1–3 type samples had a higher porosity with the same initial solid loading of slurry. When the porosity was the same, the 1–3 type samples also had greater d33 and ε (the d33 value was 20% greater than that of the 3–3 type samples and the relative permittivity value was 100% greater than that of the 3–3 type samples). The acoustic impendence of 1–3 type samples, which reached 2.1 × 107 (Pa?s)/m that matched well with the water or human tissue, was lower than that of 3–3 type samples.

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基金项目:
创新研究群体科学基金项目信息功能陶瓷材料科学(50921061)资助项目
作者简介:
郭 瑞(1975—),女,博士研究生
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参考文献:

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