Rods of silver (Ag)-dysprosium (Dy3+) co-doped in silica xerogels were synthesized via sol–gel method. The doped matrices, as a function of Dy3+ions concentration, were characterized using ultraviolet-visible and near-infrared (UV–VIS-NIR) and photoluminescence (PL) spectroscopy. The ...
X-ray diffraction/ time-temperature-transformation diagramSol-Gel prepared PZT films of composition Pb1.05 (Zr0.53Ti0.47)O3 were isothermally annealed at different temperatures between 400°C and 700°C for various times and the phases formed were determined by X-ray diffraction. The sequence of ...
Rods of silver (Ag)-dysprosium (Dy3+) co-doped in silica xerogels were synthesized via sol–gel method. The doped matrices, as a function of Dy3+ ions concentration, were characterized using ultraviolet-visible and near-infrared (UV–VIS-NIR) and photoluminescence (PL) spectroscopy. The forma...
to devise an economically viable and rapid sol–gel method to make silica gel from sodium silicate (Na2SiO3) in large quantities [12] and Kistler [13] described the first synthesis of a highly porous silica (SiO2) form, which he dubbed “aerogel”, by supercritically drying the gel obtained...
Fig. 8.Microscopic analysis of AgNbO3powder by sol-gel method compared with traditional method (solid phase) [94]: (a) XRD; (b) TEM; (c) EDS. The sol-gel method has the following advantages: (1) Since the raw materials are dispersed in the solvent, the uniformity at the molecular ...
catalysts, which is a promising method to prepare new TiO 2 catalysts. 2 Experimental 2.1 Preparation of the Br–N–TiO 2 catalysts The flow diagram for preparation of Br–N–TiO 2 catalysts is shown in Fig. 1. All the chemicals used in the experi- ments are analytical grades, bought...
LETTrlar Citrate sol-gel method for the preparation of p / p " -alumina H Choy,J Yoo,Y Han,... 被引量: 1发表: 1993年 Low Temperature Synthesis of Ultrafine α-Al2O3 Powder by a Simple Aqueous Sol-gel Process. Powder preparationAqueous Sol–gel processUltrafine α-AlO was synthesized...
Ferroelectric thin films, which are Pb(Mgl/3Nb2/3)03 (PMN) and Pb(Mgl/3Nb2/3)03 - PbTiO3 (PMN-PT) in the perovskite phase, were obtained by the sol-gel method with metal alkoxides. The films had highly preferred orientation on substrates whose interplanar spacings are close to that ...
zirconia-calcium sulfate phase diagramsol–gel zirconiaRietveld of zirconia-calcium sulfate nanomaterialsX-ray diffraction of zirconia-calcium sulfate nanomaterialsMixtures of ZrO 2 -CaSO 4 in different molar ratio were prepared by the sol–gel method. The precursors were anhydrous calcium sulfate (CaSO...
Firstly Co–Zn ferrite nanopowder is synthesized using the sol–gel method with a composition of CoxZn(0.90-x)Al0.10Fe2O4 as presented in Fig. 1a. The x values are chosen as 0.20, 0.40 and 0.60 for Co20, Co40 and Co60 respectively. The necessary amount of Cobalt nitrate, Zinc nitrate...