Effect of crystallite size on structural and luminescent properties of nanostructured Eu3+:KGdF4 synthesised by co-precipitation method

White and red emitting LaF 3 nanocrystals doped with Eu 2+ and Eu 3+ ions: Spectroscopic and magnetic studies

“…The presence of Eu 2þ in the samples studied is related to the reducing properties of glycerine used in the synthesis. The reduction of Eu 3þ to Eu 2þ has been also observed in KGdF 4 :Eu 3þ obtained by precipitation from solution heated in argon atmosphere in carbon boats [36].…”

Reverse precipitation synthesis and characterization of CeO2 nanopowder

“…3. As can be seen, crystallite size decreases from 13.4 to 11 nm with increasing the calcination temperature to 300 • C. This decrease results most probably from broadening of diffraction peaks due to destabilization of the low-temperature cubic phases, rather than from actual shrinking of crystallites [26]. By increasing the temperature more than 300 • C, crystallite size increases.…”

Eu-=SUP=-3+-=/SUP=- как люминесцентный зонд для исследования структуры R-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=--материалов (R --- Y, Eu и Gd)

“…Образец 21 является рентгеноаморф-ным. В образце 19 при отжиге образовалось веще- [5,9]. Благодаря высокой энергии возбуждения в спектре наблюдались полосы, соответствующие пере-ходам с высокоэнергетических 5 D 3 -термов в области спектра от 400 до 460 nm.…”