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采用静电纺丝技术制备了聚乙烯吡咯烷酮(polyvinylpyrrolidone,PVP)/[Y(NO3)3+Al(NO3)3]复合纳米纤维,将复合纤维进行焙烧,得到了钇铝石榴石(yttrium aluminium garnet,YAG)纳米纤维。用X射线衍射、扫描电子显微镜、热重-差热分析、Fourier变换红外光谱对PVP/[Y(NO3)3+Al(NO3)3]和YAG纤维样品进行了分析。结果表明:PVP/[Y(NO3)3+Al(NO3)3]复合纳米纤维为非晶态,经900℃焙烧10h后,获得了单相石榴石型的YAG立方晶系纳米纤维,空间群为Ia3d。所制备的PVP/[Y(NO3)3+Al(NO3)3]复合纤维表面光滑,平均直径约175nm;YAG纳米纤维平均直径约75nm,长度大于100μm。复合纤维在温度高于550℃时,质量保持恒定,总质量损失率为90.4%。初步讨论了YAG纳米纤维的形成机理。
The polyvinylpyrrolidone (PVP) / [Y (NO3) 3 + Al (NO3) 3] composite nanofibers were prepared by electrospinning technique and the composite fibers were calcined to obtain yttrium aluminum garnet (Yttrium aluminum garnet, YAG) nanofibers. The PVP / [Y (NO3) 3 + Al (NO3) 3] and YAG fiber samples were analyzed by X-ray diffraction, scanning electron microscopy, TG-DTA and Fourier transform infrared spectroscopy. The results showed that the PVP / [Y (NO3) 3 + Al (NO3) 3] composite nanofibers were amorphous. After calcined at 900 ℃ for 10h, single phase garnet YAG cubic nanofibers were obtained. For Ia3d. The prepared PVP / [Y (NO3) 3 + Al (NO3) 3] composite fibers have a smooth surface with an average diameter of about 175 nm; the YAG nanofibers have an average diameter of about 75 nm and a length of more than 100 μm. When the temperature of composite fiber is higher than 550 ℃, the quality is kept constant, the total mass loss rate is 90.4%. The formation mechanism of YAG nanofibers was discussed preliminarily.