Abstract
Monodispersive Y 2O 3:Tb 3+ spherical phosphor was synthesized by homogenous precipitation process. By using X-ray diffractometer, thermogravimetric analysis (TGA), transmission and scanning electron microscopes, and inductively coupled plasma (ICP)-optical emission spectrometry (OES), the precipitation behaviors were analyzed. The results indicated that the kinetics of the hydrolysis reaction of Y 3+ and Tb 3+ was a zero-order reaction, controlled by the decomposition of urea with an activation energy of 131 kJ/mol. Besides, the effect of urea concentration, reaction temperature, and aging time for the control of the precipitate size were also investigated. The dopant Tb 3+ in the solution did not significantly influence the precipitation of the yttrium component. After 800 °C calcination, the Y 2O 3:Tb 3+ powder showed nano-crystalline characteristics and emitted strong green light by a UV excitation light source.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
