摘要
Silica host matrix containing neodymium which is potentially important for the formation of nanocrystalline metal oxides was prepared by solgel method, using tetra-ethoxysilane and Nd(NO3)3 as precursor materials.The prepared samples were changed from amorphous to nanocrystallites phase at sintered temperature 550 °C(4 h), 750 °C(8 h) and 950 °C(12 h).The thermally treated sample microstructures were investigated using X-ray diffraction(XRD), Fourier transformation infrared spectroscopy(FTIR), and scanning electron mi-croscopy(SEM).While a further increase of the temperature at 750 °C and annealing time(8 h) resulted in the formation of cubic and hexagonal Nd2O3 nanocrystallites.At constant sintering temperature 950 °C for 12 h, the samples showed sharper and intense peaks.The sizes of Nd2O3 nanocrystallites were characterized by XRD with average size ~46 nm.
Silica host matrix containing neodymium which is potentially important for the formation of nanocrystalline metal oxides was prepared by solgel method, using tetra-ethoxysilane and Nd(NO3)3 as precursor materials.The prepared samples were changed from amorphous to nanocrystallites phase at sintered temperature 550 °C(4 h), 750 °C(8 h) and 950 °C(12 h).The thermally treated sample microstructures were investigated using X-ray diffraction(XRD), Fourier transformation infrared spectroscopy(FTIR), and scanning electron mi-croscopy(SEM).While a further increase of the temperature at 750 °C and annealing time(8 h) resulted in the formation of cubic and hexagonal Nd2O3 nanocrystallites.At constant sintering temperature 950 °C for 12 h, the samples showed sharper and intense peaks.The sizes of Nd2O3 nanocrystallites were characterized by XRD with average size ~46 nm.