Ba1-3xLa2xTi1-3xBi4xO3固体溶液 (0.0 ≤ x ≤ 0.05) 的合成和结构演变
M I Valenzuela-Carrillo1, M Pérez-Labra1, F R Barrientos-Hernández1
1Academic Area of Earth Sciences and Materials. Autonomous University of Hidalgo State. Road Pachuca- Tulancingo Km 4.5 Mineral de la Reforma Zip Code 42184, Hidalgo Mexico.
Heliyon
|October 14, 2024
概括
这项研究用球磨法合成了La3+和Bi3+联合剂的酸铁 (BaTiO3). 在x=0.0025的最佳兴奋剂增强了四角性,而更高的度诱导了相变和二次相.
科学领域:
- 材料科学与工程 材料科学与工程
- 固态化学 固态化学
- 纳米材料是一种纳米材料.
背景情况:
- 酸 (BaTiO3) 是一种重要的铁电材料,在电容器和传感器中具有应用.
- 兴奋剂是一种常见的策略,用于调整BaTiO3.3的结构和电气特性.
- 了解与稀土和其他元素的联合兴奋剂的影响对于先进的材料设计至关重要.
研究的目的:
- 为了研究纯粹和La3+/Bi3+联合化BaTiO3.3的合成和结构演变.
- 分析不同La3+和Bi3+度对相结构和微观结构的影响.
- 为了确定用于增强铁电特性的最佳兴奋剂度.
主要方法:
- 通过球磨法进行合成,然后进行热处理.
- 使用X射线衍射 (XRD) 和瑞特维尔德精细化进行结构分析的表征.
- 高分辨率扫描电子显微镜与能量分散光谱 (HRSEM-EDS) 用于形态和元素分析.
主要成果:
- 对于x ≤ 0.006.6的兴奋剂度观察到的四角铁电相.
- 从四角形到立方形的相位转换发生在x = 0.01时,由于兴奋剂的增加.
- 在x = 0.0025时获得的最大四角性 (1.0087),超过了纯 BaTiO3 (1.0083).
- 在x = 0.05时形成的二次立方相 (BaBiO3),表明超出了可溶性极限.
- 在BaTiO3网格内,La3+和Bi3+的均分布得到了HRSEM-EDS的证实.
结论:
- 同时使用La3+和Bi3+有效地改变了BaTiO3.3的结构和特性.
- 控制的兴奋剂可以诱导相位过渡并增强四角性.
- 这项研究提供了关于联合剂BaTiO3.3的可溶性极限和结构性行为的见解.
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