| 摘要: |
| PZT95/5型铁电陶瓷的抗电击穿强度对材料的实际应用至关重要，实际应用中PZT95/5型铁电陶瓷较低的抗电击穿强度限制了它的应用；选择了PZT95/5型铁电陶瓷材料为研究对象，以提高材料的抗电击穿强度为目的，从材料的制备工艺、材料的微观结构的优化以及电击穿性能等方面，探索提高PZT95/5型铁电陶瓷抗电击穿强度的途径；采用了传统固相法、非均相沉淀法制备出了不同微观结构和性能的PZT95/5型铁电陶瓷；研究表明，采用非均相沉淀法制备了PZT95/5型铁电陶瓷，其介电、压电、铁电性能和抗电击穿性能都优于传统固相法所制备陶瓷的性能；根据弱点导致电击穿的理论，采用韦布尔分布表征和研究了所制备的PZT95/5型铁电陶瓷的电击穿性能。 |
| 关键词: PZT95/5型铁电陶瓷 非均相沉淀法 抗电击穿强度 韦布尔分布 |
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| Fabrication of Zr Rich PLZT Ferroelectric Ceramics by Heterogeneous Precipitation Method and Their Dielectric Breakdown Properties Research |
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YANG Hong1, DU Li1, ZHU Chao kuan1, ZHANG Yun hong1, WANG Jing jing2
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| Abstract: |
| The dielectric breakdown strength (Eb) of PZT95/5 type ferroelectric ceramics is very important to their actual applications, however, the low Eb of PZT95/5 type ceramics becomes a critical limitation in their actual applications. In order to improve Eb of PZT 95/5 type ferroelectric ceramics from the perspective of fabrication technology, microstructure of the materials, dielectric breakdown properties and so on, this paper selected PZT95/5 ferroelectric ceramics as research object and explored the methods for improving the dielectric breakdown strength of PZT95/5 type ferroelectric ceramics. We used traditional solid state synthesis method and heterogeneous precipitation method to prepare PZT95/5 type ferroelectric ceramics with different microstructures and properties. The research showed that the dielectric, piezoelectric and ferroelectric properties of ceramics fabricated by the heterogeneous precipitation method are more outstanding than that of the ceramics fabricated by the solid state synthesis method. According to the theory that weakness induced dielectric breakdown, we used Weibull distribution to deal with the data of Eb and compared the Eb of every kind of ceramic samples by different routes. |
| Key words: PZT95/5 type ferroelectric ceramics heterogeneous precipitation method dielectric breakdown strength Weibull distribution |
