Al掺杂Sm_3Fe_5O_(12)的合成、结构及热致变色性能

Synthesis,Structure and Thermochromic Properties of Al-doped Sm_3Fe_5O_(12) Garnets

采用高温固相法合成了一系列热致变色材料Sm_3Fe_(5-x_Al_xO_(12)(x=0,0.1,0.3,0.5),通过粉末X射线衍射(XRD)、扫描电子显微镜(SEM)、红外光谱,X射线光电子能谱(XPS)和固体紫外光谱(UV)对产物进行了表征.结果表明,样品在Al掺杂量(x)为0~0.5范围内均能得到纯相,材料中的Fe—O键为主要发色基团,随着温度的升高,样品颜色由黄绿色逐渐变为棕红色,变色区间为室温到240℃.

A series of Sm3Fe5-xAlxO12（ x = 0,0. 1,0. 3,0. 5） samples was prepared via high-temperature solid state method and characterized by powder X-ray diffraction（ XRD）,scanning electron microscopy（ SEM）,Fourier transform infrared spectroscopy（ IR）,X-ray photoelectron spectroscopy（ XPS）,UV-Vis-NIR spectroscopy. The results showed that all the samples are pure phase and Fe—O bonds are the main chromatic groups. The colors of all the samples（ x = 0,0. 1,0. 3,0. 5） turned from yellowish-green at room temperature to reddish brown at higher temperature（ 240 ℃）.