【摘要】 用共沉淀法制备了铒离子掺杂的二氧化锆纳米材料,并对它的结构、颗粒的大小和声子能量进行了表征。用980nm激光二极管和F 4500荧光光谱仪仪测量了两种样品的上转换发射光谱,观察到强的绿色发射和弱的红色发射并对这种发射现象的原因进行了分析。更多还原

【Abstract】 Zirconia has attracted very much the attention of technologists and scientists due to its combined electrical, chemical, optical, and mechanical characteristics. Zirconia has prominent characteristics such as chemical stability, high mechanical strength, high resistance to corrosion, heat resistance, electric insulation, high refractive index, etc, which makes this material suitable for optical application. Trivalent erbium ions doped Zirconia nanocrystalline was prepared by Sol-Gel methods. Xray diffraction analysis was used to determine the crystal structure. The grain size calculated to be about 10 nanometers by Sherrier’s method is in agreement with that of TEM. Raman spectra showed that the phonon energy of the host was low In comparison with other oxide materials. Under a 980nm laser diode excitation, the samples presente a strong green emission as well as a weak red emission. By comparison, the intensity of 2H11/2→4I15/2 emission increased and that of 4S3/2→4I15/2 emission decreased because of surface efficiency in the nanocrystalline.更多还原