Influence of Structural Phase Transitions on the Mechanical Behavior of Lead-Free Potassium Sodium Niobate Piezoceramics

结构相变对无铅铌酸钾钠压电陶瓷力学行为的影响

• 批准号: 392442956
• 负责人: Professor Dr.-Ing. Jürgen Rödel
• 金额: --
• 依托单位: National Natural Science Foundation of China
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/392442956?language=en
• 关键词: Influence; Structural; Phase; Transitions; Mechanical

A growing critical environmental issue exists related to the increasing use of toxic lead-based piezoelectric ceramics for various sensor and actuator applications. There have been substantial scientific and industrial efforts towards the development of lead-free alternatives, which have led to the identification of various potential material systems. Polycrystalline (KxNa1- x)NbO3 (KNN) remains one of the most promising candidates, with a high Curie point, stable electromechanical response over a wide usable temperature range, high acoustic vibration velocities, and low density. Despite the numerous advancements in tailoring the electromechanical properties, there has been very little work on understanding the mechanical response, in particular the fracture behavior, which is crucial for reliable commercial implementation. During operation piezoelectric ceramics are often exposed to high operating temperatures and large compressive stress, used to reduce cracking. Therefore, the aim of this project is to use combined and complementary experimental techniques and expertise in Germany and China to characterize the temperature-dependent mechanical properties and in situ stress-dependent crystal structure of KNN with various advanced novel measurement techniques.

越来越多的关键环境问题与对各种传感器和执行器应用的有毒铅压电陶瓷的使用日益增加有关。为了开发无铅替代方案，已经实现了大量的科学和工业努力，这导致了各种潜在材料系统的识别。多晶（KXNA1-X）NBO3（KNN）仍然是最有前途的候选者之一，具有较高的居里点，在宽的可用温度范围内稳定的机电响应，高声振动速度和低密度。尽管定制机电特性方面取得了许多进步，但在理解机械反应，特别是断裂行为方面的工作很少，这对于可靠的商业实施至关重要。在操作过程中，压电陶瓷通常会暴露于高工作温度和较大的压力应力，用于减少开裂。因此，该项目的目的是使用各种先进的新颖的测量技术，使用德国和中国的组合和互补实验技术和专业知识来表征KNN的温度依赖性机械性能和原位应力依赖性晶体结构。

项目成果

Deformation and bending strength of high performance lead‐free piezoceramics

高性能无铅压电陶瓷的变形和弯曲强度

• DOI: 10.1111/jace.18311
• 发表时间: 2022
• 期刊: Journal of the American Ceramic Society
• 影响因子: 3.9
• 作者: Lalitha KV;Isaia D;Gong W;Rödel J
• 通讯作者: Rödel J

Alkali volatilization of (Li,Na,K)NbO3-based piezoceramics and large-field electrical and mechanical properties

(Li,Na,K)NbO3基压电陶瓷的碱挥发及大场电学性能

• DOI: 10.2109/jcersj2.20201
• 发表时间: 2021
• 期刊: Journal of the Ceramic Society of Japan
• 影响因子: 1.1
• 作者: Nishiyama H;Martin A;Hatano K;Kishimoto S;Sasaki N;Webber KG;Kakimoto K
• 通讯作者: Kakimoto K

High temperature piezoelectric response of polycrystalline Li-doped (K,Na)NbO3 ceramics under compressive stress

• DOI: 10.1063/1.5134554
• 发表时间: 2020-03
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: Alexander Martin;N. Khansur;U. Eckstein;K. Riess;K. Kakimoto;K. Webber

Stress-modulated optimization of polymorphic phase transition in Li-doped (K,Na)NbO3

• DOI: 10.1063/5.0016072
• 发表时间: 2020-07
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: N. Khansur;Alexander Martin;K. Riess;H. Nishiyama;Keiichi Hatano;Ke Wang;Jingfeng Li;K. Kakimoto-K.-Kak

Electric-field-induced strain of (Li,Na,K)NbO3-based multilayered piezoceramics under electromechanical loading

• DOI: 10.1063/5.0029615
• 发表时间: 2020-12
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: H. Nishiyama;Alexander Martin;Keiichi Hatano;Sumiaki Kishimoto;Nobuhiro Sasaki;N. Khansur;K. Webber;K. Kakimoto