一种高结晶亚微米尺寸BiFeO₃的简便合成与表征

A Facile Synthesis and Characterization of Highly Crystalline Submicro-Sized BiFeO.

作者信息

Karoblis Dovydas, Griesiute Diana, Mazeika Kestutis, Baltrunas Dalis, Karpinsky Dmitry V, Lukowiak Anna, Gluchowski Pawel, Raudonis Rimantas, Katelnikovas Arturas, Zarkov Aleksej, Kareiva Aivaras

机构信息

Institute of Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania.

Center for Physical Sciences and Technology, LT-02300 Vilnius, Lithuania.

出版信息

Materials (Basel). 2020 Jul 7;13(13):3035. doi: 10.3390/ma13133035.

DOI:10.3390/ma13133035

PMID:32645940

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7372470/

Abstract

In this study, a highly crystalline bismuth ferrite (BFO) powder was synthesized using a novel, very simple, and cost-effective synthetic approach. It was demonstrated that the optimal annealing temperature for the preparation of highly-pure BFO is 650 °C. At lower or higher temperatures, the formation of neighboring crystal phases was observed. The thermal behavior of BFO precursor gel was investigated by thermogravimetric and differential scanning calorimetry (TG-DSC) measurements. X-ray diffraction (XRD) analysis and Mössbauer spectroscopy were employed for the investigation of structural properties. Scanning electron microscopy (SEM) was used to evaluate morphological features of the synthesized materials. The obtained powders were also characterized by magnetization measurements, which showed antiferromagnetic behavior of BFO powders.

摘要

在本研究中，采用一种新颖、非常简单且经济高效的合成方法合成了一种高结晶度的铋铁氧体（BFO）粉末。结果表明，制备高纯度BFO的最佳退火温度为650℃。在较低或较高温度下，观察到相邻晶相的形成。通过热重和差示扫描量热法（TG-DSC）测量研究了BFO前驱体凝胶的热行为。采用X射线衍射（XRD）分析和穆斯堡尔光谱研究结构性质。利用扫描电子显微镜（SEM）评估合成材料的形态特征。所得粉末还通过磁化测量进行了表征，结果表明BFO粉末具有反铁磁行为。