Synthesis and luminescence properties of Yb-doped Y2O3, Sc2O3 and Lu2O3 solid solutions nanopowders

IR-transparent MgO-Gd2O3 composite ceramics produced by self-propagating high-temperature synthesis and spark plasma sintering

“…The release of a large amount of gaseous products during the reaction prevents the collapse of these pores and hard agglomeration of the primary particles. For example, powders of rare earth element oxides [19][20][21] with a similar structure were obtained earlier.…”

“…In the overwhelming number of publications devoted to the preparation of composite MgO-RE 2 O 3 ceramics, the uniformity of the distribution of the components is achieved by the use of special methods for obtaining powders, such as flame spray pyrolysis [2] and Pechini method [9]. Previously, it was shown that the self-propagating high-temperature synthesis (SHS, combustion synthesis, and sol-gel combustion) method can be successfully applied to the synthesis of individual magnesium oxide [17,18] and rare earth element oxides [19][20][21], as well as mixed MgO-Y 2 O 3 oxides [4,10,11]. SHS is characterized by high productivity and rapidity and since the components in the precursors are mixed at a molecular level, this approach makes it possible to obtain composite nanopowders with uniform volume distribution of components.…”

Broadening emission band of Yb:LuScO3 transparent ceramics for ultrashort pulse laser

“…Among these methods, glycine-nitrate process (GNP) is a self-propagating combustion synthesis method 25 and can refine the powders and improve their sinterability, which is suitable for preparing transparent sesquioxide ceramics. [26][27][28] This work aimed to find the optimal composition for Lu 2 O 3 -Sc 2 O 3 solid solution ceramics, to achieve the highest transmittance and the broadest emission band. A series of Yb:(Lu x Sc 1-x ) 2 O 3 ceramics were fabricated via the vacuum sintering of well-dispersed nanopowders, which were preliminarily prepared through GNP.…”

Effect of starting materials and sintering temperature on microstructure and optical properties of Y2O3:Yb3+ 5 at% transparent ceramics

“…In order to increase sintering activity and reduce consolidation temperatures, nanopowders with high excess of surface energy are required. Typically, Y 2 O 3 :Yb 3+ nanopowders could be obtained by co-precipitation method [15] or hightemperature self-propagating synthesis [16,17]. High surface energy of nanopowders can lead to their morphological and phase metastability (agglomeration and formation of nonequilibrium phases).…”