Y（NO3）3 and NH3·H2O were used as a raw materials,and nano-Y2O3 powder was successfully synthesized by a precipitation method.Employing TEOS as a raw material,SiO2 powder was successfully prepared by a alkoxide-...Y（NO3）3 and NH3·H2O were used as a raw materials,and nano-Y2O3 powder was successfully synthesized by a precipitation method.Employing TEOS as a raw material,SiO2 powder was successfully prepared by a alkoxide-hydrolysis method,and a Y2O3/SiO2 composite powder was obtained by coating.The Y2O3,SiO2,and Y2O3/SiO2 powders were characterized using X-ray diffraction（XRD）,scanning electron microscopy（SEM）,and Fourier transform infrared spectrophotometer（FT-IR）;the Y2O3 and Y2O3/SiO2 powders were further examined by photoluminescence（PL） spectra.The results indicated that the Y2O3 powder had a body-centered cubic structure with an average size of 35 nm,while the SiO2 powder was amorphous,with an average size of 145 nm and a narrow size distribution.The PL spectra of the Y2O3 and Y2O3/SiO2 powders showed that their wavelength of emission spectra were 585 nm,while their wavelength of excitation spectra were in the range of 240-260 nm.The optical properties of the Y2O3/SiO2 powder were identical to the Y2O3 powder.展开更多
基金supported by the National Basic Research Program of China (No.2007CB613603)
文摘Y（NO3）3 and NH3·H2O were used as a raw materials,and nano-Y2O3 powder was successfully synthesized by a precipitation method.Employing TEOS as a raw material,SiO2 powder was successfully prepared by a alkoxide-hydrolysis method,and a Y2O3/SiO2 composite powder was obtained by coating.The Y2O3,SiO2,and Y2O3/SiO2 powders were characterized using X-ray diffraction（XRD）,scanning electron microscopy（SEM）,and Fourier transform infrared spectrophotometer（FT-IR）;the Y2O3 and Y2O3/SiO2 powders were further examined by photoluminescence（PL） spectra.The results indicated that the Y2O3 powder had a body-centered cubic structure with an average size of 35 nm,while the SiO2 powder was amorphous,with an average size of 145 nm and a narrow size distribution.The PL spectra of the Y2O3 and Y2O3/SiO2 powders showed that their wavelength of emission spectra were 585 nm,while their wavelength of excitation spectra were in the range of 240-260 nm.The optical properties of the Y2O3/SiO2 powder were identical to the Y2O3 powder.
