Structural and spectroscopic properties of Yb3+-doped MgAl2O4 nanocrystalline spinel

2014 ◽  
Vol 43 (21) ◽  
pp. 7752-7759 ◽  
Author(s):  
Rafal J. Wiglusz ◽  
Georges Boulon ◽  
Yannick Guyot ◽  
Malgorzata Guzik ◽  
Dariusz Hreniak ◽  
...  
Keyword(s):  
Sol Gel ◽  
Spectroscopic Properties ◽  
Spectroscopic Measurements ◽  
Gel Method ◽  
Sol Gel Method

Pechini's sol–gel method was successfully applied to obtain an Yb3+-doped MgAl2O4 spinel nanopowder. The regularity between the observed structural and spectroscopic measurements was described in detail.

scholarly journals Ferroelectric Behavior and Spectroscopic Properties of La-Modified Lead Titanate Nanoparticles Prepared by a Sol-Gel Method

2019 ◽  
Author(s):  
Massaud Mostafa ◽  
Ziyad Alrowaili ◽  
Gehad Rahwan ◽  
Melad Gerges
Keyword(s):  
Dielectric Properties ◽  
Lead Titanate ◽  
Sol Gel ◽  
Spectroscopic Properties ◽  
Secondary Phases ◽  
Dielectric Characteristics ◽  
Gel Method ◽  
Sol Gel Method ◽  
Time Periods ◽  
Perovskite Type

Perovskite type (Pb1-1.5x Lax0.5x)TiO3 (PLT) ceramics with x = 0.21, 0.22, 0.23, 0.24, 0.25 were prepared by the sol-gel method. Their structural, optical, and dielectric properties were investigated. The crystallite compounds were obtained by calcinating the mixture of PbCO3, TiO2, and La2O3 at 1000ºC for different time periods. After 4 h annealing, PLT23 sample, no secondary phases have been observed in the XRD spectrum of the PLT sample with 23% La content (PLT23). This sample appears to be notably distinguished in its structural, optical, and dielectric characteristics compared with other samples.

scholarly journals Triple molybdate scheelite-type upconversion phosphor NaCaLa(MoO4)3:Er3+/Yb3+: structural and spectroscopic properties

2016 ◽  
Vol 45 (39) ◽  
pp. 15541-15551 ◽  
Author(s):  
Chang Sung Lim ◽  
Aleksandr S. Aleksandrovsky ◽  
Maxim S. Molokeev ◽  
Aleksandr S. Oreshonkov ◽  
Denis A. Ikonnikov ◽  
...  
Keyword(s):  
Sol Gel ◽  
Spectroscopic Properties ◽  
Gel Method ◽  
Sol Gel Method ◽  
Triple Molybdate ◽  
Triple Molybdates

Triple molybdates NaCaLa(1−x−y)(MoO4)3:xEr3+,yYb3+were synthesized by the microwave sol–gel method.

Spectroscopic properties of erbium doped silica glasses obtained by sol-gel method

1998 ◽  
Vol 275-277 ◽  
pp. 420-423 ◽  
Author(s):  
W. Stręk ◽  
P.J. Dereń ◽  
K. Maruszewski ◽  
E. Pawlik ◽  
W. Wojcik ◽  
...  
Keyword(s):  
Sol Gel ◽  
Spectroscopic Properties ◽  
Gel Method ◽  
Sol Gel Method ◽  
Silica Glasses ◽  
Erbium Doped

scholarly journals Investigations of microstructural and impedance spectroscopic properties of Mg0.5Co0.5Fe1.6Al0.4O4 ferrite prepared using sol-gel method

2021 ◽  
Author(s):  
Touka Dabbebi ◽  
S. Hcini ◽  
B. Alzahrani ◽  
H. Rahmouni ◽  
A. Mallah ◽  
...  
Keyword(s):  
Small Polaron ◽  
Sol Gel ◽  
Interfacial Polarization ◽  
Spectroscopic Properties ◽  
Dielectric Constants ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Increasing Temperature

Abstract Polycrystalline Mg0.5Co0.5Fe1.6Al0.4O4 ferrite was prepared with sol-gel method. This sample was characterized by powder X-ray diffraction (XRD), Scanning electron microscopy, and impedance spectroscopy. X-ray diffraction analysis combined with the Rietveld refinement confirmed that the sample crystallizes in a single-phase cubic spinel structure with (SG: \(Fd\stackrel{-}{3}m\)). Electrical conductivity obeying the Jonscher power law indicates that the prepared material exhibits semiconductor behavior, and the conduction process follows the “non-overlapping small polaron tunnelling” model between neighbors’ sites. The behavior of dielectric constants such as permittivity and loss coefficient has been interpreted based on the Maxwell-Wagner's theory of interfacial polarization. The curves of imaginary parts of impedance (Z'') and modulus (M'') show a dielectric-relaxation phenomenon in the sample with activation energy near to that determined from the dc conductivity study. Nyquist plots (Z″ vs. Z') show a monotonic decrease in both grain resistance (Rg) and grain boundary resistance (Rgb) with increasing temperature such as Rgb > > Rg. This result confirms that the transport mechanism for Mg0.5Co0.5Fe1.6Al0.4O4 compound is governed by the grain boundaries effect.

Fabrication and spectroscopic properties of Yb3+-doped silica glasses using the sol-gel method

2012 ◽  
Vol 10 (8) ◽  
pp. 081601-81604 ◽  
Author(s):  
Shaojun Liu Shaojun Liu ◽  
Haiyuan Li Haiyuan Li ◽  
Yongxing Tang Yongxing Tang ◽  
Lili Hu Lili Hu
Keyword(s):  
Sol Gel ◽  
Spectroscopic Properties ◽  
Gel Method ◽  
Sol Gel Method ◽  
Silica Glasses

Synthesis and Photocatalytic Property of N-doped BiVO$lt;inf$gt;4$lt;/inf$gt; via Sol-Gel Method Using Corn Stem as Template

2014 ◽  
Vol 29 (8) ◽  
pp. 807
Author(s):  
WANG Min ◽  
NIU Chao ◽  
DONG Zhan-Jun ◽  
CHE Yin-Sheng ◽  
DONG Duo ◽  
...  
Keyword(s):  
Sol Gel ◽  
Photocatalytic Property ◽  
Gel Method ◽  
Sol Gel Method

Fe2O3 - TiO2 THIN FILMS PREPARED BY SOL-GEL METHOD

2011 ◽  
Vol 10 (2) ◽  
pp. 187-192 ◽  
Author(s):  
Ramona-Crina Suciu ◽  
Marcela Corina Rosu ◽  
Teofil Danut Silipas ◽  
Emil Indrea ◽  
Violeta Popescu ◽  
...  
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Gel Method ◽  
Sol Gel Method
Sign in / Sign up

Export Citation Format

Share Document