A novel co-precipitation synthesis of a new phosphor Lu2O3:Eu3+

Influence of precipitants on morphology and sinterability of Nd3+:Lu2O3 nanopowders by a wet chemical processing

“…1(f). It has been proved in our previous work [13] that the introduction of CO 3 2− is beneficial to obtain less agglomerated and uniformly dispersed powders. The release of CO 2 during the decomposition of the carbonate precursor at about 700 • C would prevent the crystalline particles from severe agglomeration with each other to some extent.…”

“…It was considered that particle size (less than 100 nm) and spherical particle shape were the two important requirements, which enabled close contact among powder particles during the sintering process, leading to fully densification of polycrystalline bulk specimen [6]. Various methods have been developed for the preparation of Lu 2 O 3 powders with satisfied microstructural features [7,8], such as combustion synthesis [9], molten salts route [10], solid state reaction [1,2], hydrothermal synthesis [11,12], and co-precipitation processing [13]. Zych et al [14,15] in the combustion process, severe agglomerations between adjacent particles could not be avoided, coupled by severe particle growth during annealing at higher temperatures.…”

Hydrothermal synthesis of fully crystalline Nd:Lu2O3 nanopowders under a low temperature

“…Basic lutetium carbonate precursor was synthesized by a modified precipitation (NH4OH to NH4HCO3 with 1:4 molar ratio) method based on our previous work [12,15,16]. As-prepared colloidal solution was divided into 3 parts, and the 10 M NaOH solution was used as the mineralizer to adjust the final pH values (pH 10, 12, 14, respectively).…”

“…It is obvious that a calcination processing after hydrothermal synthesis seems necessary to achieve the fully crystalline oxide products, which is a time and device consuming drawback. Lu 2 O 3 is a kind of attractive sesquioxide with cubic structure, which favors its applications as promising phosphors, host material for scintillators and laser gain media [8][9][10][11][12][13][14]. In this report, we have successfully synthesized fully crystalline Nd:Lu 2 O 3 phosphors by a facile hydrothermal approach without any catalysts, templates or subsequent thermal decomposition.…”

Hydrothermal route to Eu doped LuO(OH) and Lu2O3 nanorods

“…A conventional method to synthesize Lu 2 O 3 powders was the combustion method using urea ((NH 2 ) 2 CO) as a fuel [3]. Recently, Chen et al fabricated nanosized lutetia powders through a modified co-precipitation synthesis using the mixed NH 3 ·H 2 O and NH 4 HCO 3 as the precipitant [4]. Nano-crystalline Lu 2 O 3 :Eu powders from water-naphthalene emulsion were obtained by using polyvinyl alcohol (PVA) as a surfactant and urea as the precipitating agent [5].…”