Nd掺杂BiFeO_3粉体的水热法制备及性能研究

Preparation of Nd Doped Bifeo_3 Powders by Hydrothermal Method and Performance Research

文章分别用分析纯的Fe(NO3)3·9H2O、Bi(NO3)3·5H2O和Nd(NO3)3·6H2O作为铁源、铋源和钕源,利用水热法在KOH浓度为8M,200℃温度下反应24h制备的Nd掺杂Bi1-xNdxFeO3(x=0.00、0.050、0.075、0.100)粉体。XRD研究表明在Nd的掺杂比例达到10%时仍然能够获得钙钛矿结构BiFeO3,但出现Bi2Fe4O9杂相。SEM结果表明,随着Nd掺杂浓度的升高,铁酸铋粉体的尺寸变小。红外光谱研究表明BiFeO3具有钙钛矿结构,Nd掺杂导致了晶格畸变。紫外-可见光吸收图谱表明BiFeO3在550-650nm波长范围内存在一个较宽的吸收带。随着掺杂浓度的增加,BiFeO3的禁带宽度减小。

In this paper, we reports the effect of Nd doping on structural, morphological and optical propertiesof Nd doped Bi1-xNdxFeO3（x = 0.00, 0.050, 0.075, 0.050） powders synthesized by hydrothermal method. XRDresearch shows that when 10% of Nd doped will still be able to obtain BiFeO3 perovskite structure, but appear Bi2Fe4O9 phase. The SEM results show that with the increase of Nd doped concentration, the size of BiFeO3 powdersbecome smaller. FTRI studies have shown that BiFeO3 with perovskite structure, Nd doping led lattice distortion.Ultraviolet-visible absorption spectrum showed that BiFeO3 in 550-650 nm wavelength range there is a wide absorp-tion band. The corresponding energy band gap of the samples decreases with the increase of Nd-doping concentra-tion.