Structural characteriztion of Nd-doped in silica host matrix prepared by net chemical process
来源期刊：JOURNAL OF RARE EARTHS2009年第1期
论文作者：Surender Duhan M.Singh Sunita Devi
Key words：rare earth oxide; silica; annealing/calcination; nanocrystallites;
Abstract: 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℃ (4 h), 750℃ (8 h) and 950 ℃ (12 h). The thermally treated sample microstructures were investigated using X-ray diffraction (XRD), Fourier transformation infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). While a further increase of the temperature at 750 ℃ and annealing time (8 h) resulted in the formation of cubic and hexagonal Nd2O3 nanocrystallites. At constant sintering temperature 950℃ for 12 h, the samples showed sharper and intense peaks. The sizes of Nd2O3 nanocrystallites were characterized by XRD with average size～46 nm.
Surender Duhan1，M.Singh3，Sunita Devi4
(1.Materials Science Lab, Department of Applied Physics ,Guru Jambheshwar University of Science&Technology,Hisar-12500l,India;
2. Materials Science Lab Department of Physics Govt S.S.S Sanghi (Rohtak-124001;
3.Department of Physics Amity School of Engineering and Technology Amity University Sec-125 Noida-20130(U.P;
4.Department of Chemistry Lajpat Rai College Sahibabad(Ghazaiabad)
Abstract: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℃ (4 h), 750℃ (8 h) and 950 ℃ (12 h). The thermally treated sample microstructures were investigated using X-ray diffraction (XRD), Fourier transformation infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). While a further increase of the temperature at 750 ℃ and annealing time (8 h) resulted in the formation of cubic and hexagonal Nd2O3 nanocrystallites. At constant sintering temperature 950℃ for 12 h, the samples showed sharper and intense peaks. The sizes of Nd2O3 nanocrystallites were characterized by XRD with average size～46 nm.
Key words:rare earth oxide; silica; annealing/calcination; nanocrystallites;
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