梯度-接受剂-兴奋剂打破了无 (K,Na) NbO陶的压电交易
Lei Yan1, Yang Yao2, Zhipeng Wang3
1College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China.
Advanced materials (Deerfield Beach, Fla.)
|December 13, 2025
概括
一个新的梯度兴奋剂策略克服了铁电陶的权衡. 这种方法提高了 (K,Na) NbO3陶的压电系数 (d33) 和机械质量系数 (Qm),实现了创纪录的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 陶工程 陶工程
背景情况:
- 在铁电陶中同时实现高压电系数 (d33) 和机械质量系数 (Qm) 是一个挑战.
- 传统的捐赠者或接受者兴奋剂策略导致了权衡,牺牲了一项财产以换取另一项财产.
- 软 (K,Na) NbO3 (KNN) 陶通常具有较高的d33,但较低的Qm.
研究的目的:
- 开发一种新的兴奋剂策略,以克服KNN陶中d33-Qm的权衡.
- 通过渐变受体兴奋剂实现同时高d33和Qm.
- 调查负责增强性质的结构机制.
主要方法:
- 2+受体离子的渐变化为柔软的KNN陶.
- 多尺度结构分析 (例如,XRD,SEM,TEM - - *特定的技术没有详细的摘要*).
- 测量压电系数 (d33) 和机械质量系数 (Qm).
主要成果:
- 在KNN陶中实现了d33 = 350 pC/N和Qm = 340的创纪录组合.
- 在基于KNN的系统中,首次报告的d33和Qm的共同升高超过300.
- 与传统兴奋剂相比,Qm的改善是四倍,而d33的减少仅为10%.
结论:
- 渐变受容器兴奋剂有效地打破了KNN陶中的d33-Qm权衡.
- 梯度结构为高d33创造了一个柔软的内部,为增强Qm创造了一个硬化的表面层.
- 这一战略为通过空间物业定制设计高性能铁电陶提供了一个新的范式.
更多相关视频
07:44Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
Published on: April 27, 2016
10.0K
10:40A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
8.6K
相关概念视频
01:11P-N junction
1.1K
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
1.1K
01:16Biasing of P-N Junction
1.7K
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
1.7K