Structural and Spectroscopic Properties of LaOF:Eu3+Nanocrystals Prepared by the Sol–Gel Pechini Method

2011 ◽  
Vol 50 (17) ◽  
pp. 8112-8120 ◽  
Author(s):  
Tomasz Grzyb ◽  
Stefan Lis
Keyword(s):  
Pechini Method ◽  
Sol Gel ◽  
Spectroscopic Properties

Synthesis and spectroscopic properties of Yb3+ and Tb3+ co-doped GdBO3 materials showing down- and up-conversion luminescence

2015 ◽  
Vol 44 (9) ◽  
pp. 4063-4069 ◽  
Author(s):  
Tomasz Grzyb ◽  
Konrad Kubasiewicz ◽  
Agata Szczeszak ◽  
Stefan Lis
Keyword(s):  
Pechini Method ◽  
Sol Gel ◽  
Spectroscopic Properties ◽  
Dual Mode ◽  
Co Doped

Gadolinium orthoborates doped with Yb3+ and Tb3+ ions, showing dual-mode luminescence (down- and up-conversion), were synthesised by the sol–gel Pechini method and analysed.

Spectroscopic properties of Y1−xEuxBO3 and Y1−xTbxBO3 nanopowders obtained by the sol–gel Pechini method

2014 ◽  
Vol 155 ◽  
pp. 374-383 ◽  
Author(s):  
Agata Szczeszak ◽  
Konrad Kubasiewicz ◽  
Tomasz Grzyb ◽  
Stefan Lis
Keyword(s):  
Pechini Method ◽  
Sol Gel ◽  
Spectroscopic Properties

Development of temporal spectroscopic properties for Xerogel matrices doped with Rhodamine 6G dye

Open Physics ◽  
2006 ◽  
Vol 4 (3) ◽  
Author(s):  
Abbas Al-Wattar ◽  
Baha Chiad ◽  
Wesam Twej ◽  
Sarmed Al-Awadi
Keyword(s):  
Fluorescence Spectra ◽  
Rhodamine 6G ◽  
Sol Gel ◽  
Blue Shift ◽  
Spectroscopic Properties ◽  
Dye Molecules ◽  
Absorption And Fluorescence Spectra ◽  
Silica Network ◽  
Sol Gel Process ◽  
Two Parameters

AbstractThe solid host of a laser dye modifies its spectroscopic properties with respect to its liquid host. During the Sol-Gel process the dye molecules suffer from changing their environment. Two parameters affect this matter, the change in the concentration due to the evaporation of the solvent (drying) and the caging of dye molecules inside the pores or attachment to the silica network. Rhodamine 6G absorption and fluorescence spectra with different concentrations, during Sol-Gel time processing, have been studied. Both, absorption and fluorescence spectra of the dye in the solid host, for different concentrations, show a blue-shift relative to its liquid phase.

scholarly journals SiO2-SnO2:Er3+ Glass-Ceramic Monoliths

2018 ◽  
Author(s):  
Lam Thi Ngoc Tran ◽  
Damiano Massella ◽  
Lidia Zur ◽  
Alessandro Chiasera ◽  
Stefano Varas ◽  
...  
Keyword(s):  
Rare Earth ◽  
Optical Sensors ◽  
Tin Dioxide ◽  
Sol Gel ◽  
Glass Ceramics ◽  
Building Blocks ◽  
Spectroscopic Properties ◽  
Silica Matrix ◽  
Rare Earth Ions ◽  
Planar Waveguides

The development of efficient luminescent systems, such as microcavities, solid state lasers, integrated optical amplifiers, optical sensors is the main topic in glass photonics. The building blocks of these systems are glass-ceramics activated by rare earth ions because they exhibit specific morphologic, structural and spectroscopic properties. Among various materials that could be used as nanocrystals to be imbedded in silica matrix, tin dioxide presents some interesting peculiarities, e.g. the presence of tin dioxide nanocrystals allows increase in both solubility and emission of rare earth ions. Here, we focus our attention on Er3+ - doped silica – tin dioxide photonic glass-ceramics fabricated by sol-gel route. Although the SiO2-SnO2:Er3+ could be fabricated in different geometrical systems: thin films, monoliths and planar waveguides we herein limit ourselves to the monoliths. The effective role of tin dioxide as luminescence sensitizer for Er3+ ions is confirmed by spectroscopic measurements and detailed fabrication protocols are discussed.

Spectroscopic properties of LaGaO3:V,Nd3+ nanocrystals as a potential luminescent thermometer

2018 ◽  
Vol 20 (33) ◽  
pp. 21598-21606 ◽  
Author(s):  
K. Kniec ◽  
L. Marciniak
Keyword(s):  
Pechini Method ◽  
Spectroscopic Properties

In this work we present the spectroscopic properties of LaGaO3:V,Nd3+ nanocrystals, which have been successfully obtained by the Pechini method.

Pressure assisted sintering of Al2O3–Y2O3 glass microspheres: sintering conditions, grain size, and mechanical properties of sintered ceramics

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Anna Prnová ◽  
Jana Valúchová ◽  
Monika Michálková ◽  
Beáta Pecušová ◽  
Milan Parchovianský ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Hot Pressing ◽  
Pechini Method ◽  
Sol Gel ◽  
Applied Pressure ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Glass Microspheres ◽  
Amorphous Powders

Abstract Glass microspheres with yttria-alumina eutectic composition (76.8 mol % Al2O3 and 23.2 mol % Y2O3) were prepared by sol-gel Pechini method and flame synthesis with or without subsequent milling. Prepared amorphous powders were studied by X-ray powder diffraction (XRD), particle size analysis (PSA), scanning electron microscopy (SEM) and differential thermal analysis (DTA). Hot pressing (HP), rapid hot pressing (RHP) and spark plasma sintering (SPS) were used to sinter amorphous precursor powders at 1600 °C without holding time (0 min). The preparation process including milling step resulted in amorphous powders with narrower particle size distribution and smaller particle size. All applied pressure assisted sintering techniques resulted in dense bulk samples with fine grained microstructure consisting of irregular α-Al2O3 and Y3Al5O12 (YAG) grains. Milling was beneficial in terms of final microstructure refinement and mechanical properties of sintered materials. A material with the Vickers hardness of HV = (17.1 ± 0.3) GPa and indentation fracture resistance of (4.2 ± 0.2) MPa.m1/2 was prepared from the powder milled for 12 h.

scholarly journals Pr3+ doping at the A-site of La0.67Ba0.33MnO3 nanocrystalline material: assessment of the relationship between structural and physical properties and Bean–Rodbell model simulation of disorder effects

RSC Advances ◽  
2019 ◽  
Vol 9 (44) ◽  
pp. 25627-25637 ◽  
Author(s):  
Ma. Oumezzine ◽  
Herbet Bezerra Sales ◽  
Ahmed Selmi ◽  
E. K. Hlil
Keyword(s):  
Physical Properties ◽  
Carrier Concentration ◽  
Nanocrystalline Material ◽  
Model Simulation ◽  
Pechini Method ◽  
Sol Gel ◽  
Disorder Effects ◽  
Bulk Nanocrystalline ◽  
A Site ◽  
The Relationship

Bulk nanocrystalline samples of (La1−xPrx)0.67Ba0.33MnO3 (0.075 ≤ x ≤ 0.30) manganites with a fixed carrier concentration are prepared by the sol–gel based Pechini method.

The influence of Si4+ co-doping on the spectroscopic properties of β-NaCaPO4:Eu2+/Eu3+

2019 ◽  
Vol 43 (8) ◽  
pp. 3409-3418
Author(s):  
N. Górecka ◽  
K. Szczodrowski ◽  
A. Lazarowska ◽  
M. Grinberg
Keyword(s):  
Calcium Phosphate ◽  
Pechini Method ◽  
Spectroscopic Properties ◽  
Luminescent Materials ◽  
Co Doping ◽  
Sodium Calcium ◽  
Silicon Ions

A series of luminescent materials based on a sodium calcium phosphate matrix doped with europium and different concentrations of silicon ions was synthesized using the Pechini method.

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