Preparation Of Rare Earth Doped Fluoride Nanomaterials

In recent years, with the continuous development of material chemistry, rare earth doped micro/nano material with its unique physical and chemical properties in the solid state laser, light display and solar cells has be focused. Rare earth fluoride has made great progress due to its low phonon energy, high light transmittance and good stability. Introduce trivalent lanthanide ions into rare earth fluoride, material will show excellent luminescent and magnetic properties. The size and morphology of nano materials has a great influence on its properties. In order to study the size effect of morphology, researchers spent great efforts to study rare earth fluoride micro/nano materials. Especially the binary and ternary gadolinium fluoride, biomedical fields such as multimode imaging has huge potential application because of its multimode imaging enormous application has become a hot research topic at present. Therefore, fluoride micro/nano materials of gadolinium in-depth study has great practical significance. This paper mainly introduced the Ln3+doped fluoride magneto-optical and size effect of properties, experiment contents mainly include the following:This article used calcium fluoride as substrate, Er3+ as activator, Yb3+ as sensitizer, by controlling the amount of oleic acid and synthesis of a series of morphology of CaF;:Yb3+/Er3+ nanoparticles. And used the X-ray diffractometer and scanning electron microscopy to characterize its performance. When oleic acid is enough, the morphology of nanoparticles will be square.Then only use Er3+ as activator, Yb3+ as sensitizer, by adjust the amount of oleic acid to synthesis small size ErF3:Yb3+. With the change of the oleic acid dosage, ErF3: Yb3+ will appear different degree of assembly.By controlling the ratio of rare earth ions to synthesized cubic and hexagonal phase of NaLnF4 (Ln=Gd3+/Yb3+/Er3+), temperature and the ratio of rare earth ions will affect its phase.