Peakfit在M型铁氧体FT-IR谱分峰拟合及化学组成分析中的应用

Application of Peakfit in FT-IR Spectrum Fitting and Chemical Composition Analysis of M-type Ferrite

采用二次化学共沉淀方法制备M型铁氧体BaFe_(12)O_(19)。采用X射线衍射(XRD)和傅立叶变换红外光谱(FT-IR)对制备产物进行物相组成分析,采用Peakfit软件对制备产物的低频区FT-IR谱进行分峰拟合。XRD分析结果表明:800~1200℃范围内制备的产物为BaFe_(12)O_(19),未见其他晶态杂相。分峰拟合结果表明:800~400cm^(-1)范围内除BaFe_(12)O_(19)吸收峰,还存在Fe_(2)O_(3)和BaO吸收峰,说明中间产物BaO和Fe_(2)O_(3)未反应完全,以非晶态形式存在于BaFe_(12)O_(19)中;升高焙烧温度,BaO和Fe_(2)O_(3)会进一步反应生成BaFe_(12)O_(19),温度升至1200℃时反应仍未进行完全;Peakfit软件适用于铁氧体FT-IR谱分峰拟合及辅助铁氧体化学组成分析。

The M-type ferrite BaFe_(12)O_(19) was prepared by the secondary chemical co-precipitation method.X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FT-IR)were used to analyze the phase composition of the prepared product,and Peakfit software was used to perform peak fitting of the low-frequency FT-IR spectrum of the prepared product.The XRD analysis results showed that the product prepared in the range of 800~1200℃was BaFe_(12)O_(19),and no other crystalline phases were found.The peak fitting results showed that in addition to the absorption peak of BaFe_(12)O_(19),there were absorption peaks of Fe_(2)O_(3) and BaO in the range of 800~400cm^(-1),indicating that the intermediate products BaO and Fe_(2)O_(3) had not reacted completely,and existed in BaFe_(12)O_(19) in amorphous form;When the calcination temperature was increased,BaO and Fe_(2)O_(3) Would further react to form BaFe_(12)O_(19),and the reaction was not yet complete at 1200°C;Peakfit software is suitable for ferrite FT-IR spectrum peak fitting and auxiliary ferrite chemical composition analysis.