Enhanced Piezoelectric Properties of Lead-free Ferroelectric Single Crystals with Engineered Domain Configurations

具有工程化畴结构的无铅铁电单晶的增强压电性能

• 批准号: 11555164
• 负责人: WADA Satoshi
• 金额: $ 8.9万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555164/
• 关键词: lead-free ferroelectric; single crystals; engineered domain configuration; piezoelectric property; domain engineering; crystallographic anisotropy; barium titanate; piezoelectric device; 非鉛系強誘電体単結晶; ニオブ酸カリウム

In this study, our objectives are (I) an introduction of the engineered domain configurations into lead free ferroelectric single crystals and (II) occurrence of enhanced piezoelectric property by the engineered domain configurations. For these objectives, barium titanate single crystals were chosen as a typical lead-free ferroelectrics, and the relationship between the engineered domain configurations and piezoelectric property was investigated in detail. As a result, the following four points were found through this study. (1) a concept of the engineered domain configurations is universal, and this concept cam be applied into all of ferroelectric crystals. (2) the engineered domain configurations have several kinds and depend on the crystal structures such as tetragonal, orthorhombic and rhombohedral phase and crystallographic orientations such as [100], [110] and [111]. (3) In orthorhonbic barium titanate single crystals oriented along [001] direction, it was found that its piezoelectric properties was slightly larger than those of PZT ceramics. (4) In barium titanate single crystals with the engineered domain configurations, it was found that the piezoelectric properties become to larger with decreasing domain sizes. However, for barium titanate, its temperature dependence of the piezoelectric properties was not good because its low Curie temperature of 130℃ and phase transition around 5℃. Therefore, as tile feroelectrics with orthorhombic structure at room temperature and higher Curie temperature over 200℃, potassium niobate was chosen in this study. Up to date, the unknown piezoelectric properties of potassium niobate single-domain crystals was cleared through this study. At present, we investigated the introduction of the engineered domain configurations into potassium niobate crystals, and it can be expected that the much higher piezoelectric properties will be observed in the potassium niobate single crystals with the engineered domain configurations.

在这项研究中，我们的目标是（I）工程域配置到无铅铁电单晶的引入和（II）发生增强的压电性能的工程域配置。为了实现这些目标，钛酸钡单晶被选为一个典型的无铅铁电体，和工程畴结构和压电性能之间的关系进行了详细的研究。因此，通过本研究发现以下四点。(1)工程畴结构的概念是通用的，并且这个概念可以应用于所有的铁电晶体。(2)设计的畴结构有几种，并取决于晶体结构，例如四方晶、斜方晶和菱形晶相，以及晶体学取向，例如[100]、[110]和[111]。(3)在沿着[001]方向取向的斜方晶系钛酸钡单晶中，发现其压电性能略大于PZT陶瓷。(4)在钛酸钡单晶的工程域配置，它被发现，压电性能变得更大，随着域尺寸减小。而钛酸钡的居里温度较低，仅为130℃，相变温度在5℃左右，其压电性能的温度依赖性不好。因此，本研究选择了室温下具有正交相结构，居里温度高于200℃的钛酸钾作为研究对象。本研究澄清了迄今为止尚不清楚的钛酸钾单畴晶体的压电性能。目前，我们研究了在钛酸钾晶体中引入工程畴结构，可以预期，在具有工程畴结构的钛酸钾单晶中将观察到更高的压电性能。

项目成果

Satoshi Wada et al.: "Enhanced Piezoelectric Property of Barium Titanate Single Crystals with Engineered Domain Configuration"Japanese Journal of Applied Physics. 38. 5505-5511 (1999)

Satoshi Wada 等人：“通过工程域配置增强钛酸钡单晶的压电性能”日本应用物理学杂志。

S. WADA, S.SUZUKI, T. SUZUKI, T. NOMA, S.-E. PARK, L.E. CROSS and T.R. SHROUT: "Enhanced Piezoelectric Property of Barium Titanate Single Crystals with Engineered Domain Configuration"Japanese Journal of Applied Physics. 38. 5505-5511 (1999)

S.和田、S.铃木、T.铃木、T.野间、S.-E。

M. OSADA, M. KAKIHANA, S. WADA, T. NOMA and WOO-SEOK CHO: "Low-temperature Domain Structures in BaTiO3 Bulk Crystal Studied by Micro-Roman Spectroscopy"Applied Physics Letters. 75[21]. 3393-3395 (1999)

M. OSADA、M. KAKIHANA、S. WADA、T. NOMA 和 WOO-SEOK CHO：“通过微罗马光谱研究的 BaTiO3 块状晶体的低温域结构”应用物理快报。

S. WADA and T. TSURUMI: "Domain Switching Properties of 92%PZN-8%PT Single Crystals as a Function of Crystallographic Orientations"Ferroelectrics. 261. 305-310 (2001)

S.%20WADA%20and%20T.%20TSURUMI:%20"域%20Switching%20Properties%20of%2092%PZN-8%PT%20Single%20Crystals%20as%20a%20Function%20of%20Crystallatory%20Orientations"铁电体。%

Satoshi WADA: "Piezoelectric Properties of KNbO3 Single Crystals with Various Crystallographic Orientation"the Proceedings of the 10th US-Japan Seminar on Dielectric and Piezoelectric Ceramics. 249-252 (2001)

和田聪：“不同晶体取向的KNbO3单晶的压电特性”第十届美日介电和压电陶瓷研讨会论文集。