Sol-Gel Synthesis of BaTiO3 Based Films for Photonic Applications

1999 ◽  
Vol 606 ◽  
Author(s):  
V. Fuflyigin ◽  
H. Jiang ◽  
F. Wang ◽  
P. Yip ◽  
P. Vakhutinsky ◽  
...  
Keyword(s):  
Optical Communication ◽  
Lead Oxide ◽  
Relative Phase ◽  
Sol Gel ◽  
Optical Quality ◽  
Relative Phase Shift ◽  
Gel Technique ◽  
Sol Gel Synthesis ◽  
Maximum Field ◽  
Alkoxide Precursors

AbstractHigh quality barium titanate films were grown on (001)LaAlO3 and r-Al2O3 in a wide thickness range of 0.5-10 µtm by sol-gel technique. Significant improvement of the films' crystallinity and optical quality was observed if acetate precursors are used vs. alkoxide precursors, and in the presence of lead oxide. The material is transparent at 350-2000 nm, indicating the possibility of its application in light controlling devices at wavelengths used in optical communication: 1300 and 1500 nm. Maximum field induced relative phase shift of 0.22 radian was measured in the film with composition of Ba0.9Pb0.1TiO3 under a field strength of 3.106 V/cm.

Thio sol–gel synthesis of titanium disulfide thin films and nanoparticles using titanium(IV) alkoxide precursors

2007 ◽  
Vol 68 (7) ◽  
pp. 1428-1435 ◽  
Author(s):  
Alexandru L. Let ◽  
David E. Mainwaring ◽  
Colin J. Rix ◽  
Pandiyan Murugaraj
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Titanium Disulfide ◽  
Sol Gel Synthesis ◽  
Alkoxide Precursors

Sol-Gel Synthesis of YBa2Cu3O7-& Using Yttrium, Barium and Copper Polyether Alkoxide Precursors

1992 ◽  
Vol 271 ◽  
Author(s):  
Catherine J. Page ◽  
Carol S. Houk ◽  
Gary A. Burgoine
Keyword(s):  
Ligand Exchange ◽  
Sol Gel ◽  
Homogeneous Solution ◽  
Homogeneous Solutions ◽  
X Ray Scattering ◽  
Excellent Starting Point ◽  
Starting Point ◽  
Yttrium Barium ◽  
Sol Gel Synthesis ◽  
Alkoxide Precursors

ABSTRACTHomogeneous solutions of yttrium, barium and copper 2-(2-methoxy)-ethoxyethoxides in 2-(2-methoxy)ethoxyethanol of appropriate lY:2Ba:3Cu stoichiometry have been prepared and used in sol-gel synthesis of YBa2Cu3O7-δ. To our knowledge, this is the first report of the preparation of a homogeneous solution of yttrium, barium and copper homoleptic alkoxides dissolved only in the parent alcohol. These solutions provide an excellent starting point for sol-gel synthesis of YBa2Cu3O7-° since the metals are mixed on the molecular scale, and because the solutions are stable with no possibility of ligand exchange to give insoluble products. Hydrolysis and careful heat treatment of gels produced from these solutions yield nearly pure tetragonal YBa2Cu3O7-δ at temperatures as low as 725°C. The preparation of these solutions and their characterization by small-angle x-ray scattering measurements and TEM are reported, as well as preliminary data pertaining to their use in the sol-gel synthesis of YBa2Cu3O7-δ.

Facile synthesis of highly thermally stable nanoporous γ-aluminas from aluminum alkoxide precursors

RSC Advances ◽  
2015 ◽  
Vol 5 (61) ◽  
pp. 49493-49499 ◽  
Author(s):  
Gholamhossein Mohammadnezhad ◽  
Oluseun Akintola ◽  
Winfried Plass ◽  
Felix H. Schacher ◽  
Frank Steiniger ◽  
...  
Keyword(s):  
Triblock Copolymer ◽  
Sol Gel ◽  
Thermally Stable ◽  
Single Source ◽  
Facile Synthesis ◽  
Single Source Precursors ◽  
Aluminum Alkoxide ◽  
Sol Gel Synthesis ◽  
Alkoxide Precursors

The effects of aluminum alkoxide single source precursors on the sol–gel synthesis of highly thermally stable nanostructured alumina by nonionic triblock copolymer P123 were investigated.

scholarly journals Influence of some sol-gel synthesis parameters of mesoporous TiO2 on photocatalytic degradation of pollutants

2016 ◽  
Vol 22 (1) ◽  
pp. 65-73
Author(s):  
Aleksandar Golubovic ◽  
Ivana Veljkovic ◽  
Maja Scepanovic ◽  
Mirjana Grujic-Brojcin ◽  
Natasa Tomic ◽  
...  
Keyword(s):  
Anatase Phase ◽  
Sol Gel ◽  
Tetrabutyl Titanate ◽  
Textile Dye ◽  
Reactive Orange 16 ◽  
Higher Temperature ◽  
Tio2 Nanopowders ◽  
Gel Technique ◽  
Reactive Orange ◽  
Sol Gel Synthesis

The titanium dioxide (TiO2) nanopowders were produced by sol-gel technique from tetrabutyl titanate as a precursor by varying some parameters of the sol-gel synthesis like the temperature (500 and 550 ?C) and the duration of the calcination (1.5, 2, and 2.5 h). X-ray powder diffraction (XRPD) results have shown that all synthesized nanopowders are dominantly in anatase phase, with the presence of a small amount of rutile in samples calcined at 550 ?C. According to the results obtained by Williamson-Hall method, the anatase crystallite size was increased with the duration of the calcination (from 24 to 29 nm in samples calcined at lower, and from 30 to 35 nm in samples calcined at higher temperature). The analysis of the shift and linewidth of the most intensive anatase Eg Raman mode confirmed the XRPD results. The analysis of pore structure from nitrogen sorption experimental data described all samples as mesoporous, with mean pore diameters in the range of 5-8 nm. Nanopowder properties have been related to the photocatalytic activity, tested in degradation of the textile dye (C.I. Reactive Orange 16), carbofuran and phenol.

Study of Phosphocalcic Glasses SiO2-CaO-P2O5 System with and without Silver. I. Synthesis of glasses and characterization by WD-XRF and XRD

2017 ◽  
Vol 68 (5) ◽  
pp. 944-948 ◽  
Author(s):  
Daniela Avram ◽  
Nicolae Angelescu ◽  
Dan Nicolae Ungureanu ◽  
Ionica Ionita ◽  
Anca Gheboianu ◽  
...  
Keyword(s):  
Glass Transition ◽  
De Novo ◽  
Sol Gel ◽  
Thin Layers ◽  
De Novo Synthesis ◽  
Modern Methods ◽  
Gel Technique ◽  
Sol Gel Synthesis ◽  
Great Step ◽  
P2o5 System

Synthesis glasses biocompatible made a great step forward in the last few decades, moving from traditional methods of supercooling melts and casting them to the modern, using the action of neutrons, mechanical and deposition in thin layers by different techniques, glass transition or sol-gel technique. In this paper it is presented sol-gel synthesis of two glasses silicofosfocalcic composition of SiO2-CaO-P2O5 system with and without silver ions.The investigation of chemical elemental composition of researched glasses, as well as the de novo synthesis of hydroxyapatite, post dip, was done by using modern methods used for this purpose.

scholarly journals Optimisation of a sol–gel synthesis route for the preparation of MgF2 particles for a large scale coating process

2015 ◽  
Vol 44 (45) ◽  
pp. 19501-19508 ◽  
Author(s):  
K. Scheurell ◽  
J. Noack ◽  
R. König ◽  
J. Hegmann ◽  
R. Jahn ◽  
...  
Keyword(s):  
Large Scale ◽  
Sol Gel ◽  
Coating Process ◽  
Antireflective Coatings ◽  
Glass Substrates ◽  
Synthesis Route ◽  
Gel Technique ◽  
Sol Gel Synthesis

Preparation of transparent and low viscous MgF2 sols via sol–gel technique which can be applied for antireflective coatings on glass substrates is described.

scholarly journals Influence of the Microwaves on the Sol-Gel Syntheses and on the Properties of the Resulting Oxide Nanostructures

2020 ◽  
Author(s):  
Luminita Predoana ◽  
Dániel Attila Karajz ◽  
Vincent Otieno Odhiambo ◽  
Irina Stanciu ◽  
Imre M. Szilágyi ◽  
...  
Keyword(s):  
Sol Gel ◽  
Oxide Nanoparticles ◽  
Processing Temperature ◽  
Microwave Assisted ◽  
Oxide Nanostructures ◽  
Gel Technique ◽  
Gel Preparation ◽  
Sol Gel Synthesis ◽  
And Control ◽  
Preparation Techniques

Among the chemical methods in the liquid phase, the sol–gel technique is a versatile and efficient method for pure or doped metal oxide films or powders preparation, showing some advantages over other preparation techniques (high homogeneity, the possibility to introducing dopants in large amount, low processing temperature and control over the stoichiometry). Combining the sol–gel (SG)method with the effect of ultrasounds(US) or microwaves (MW) leads to improving the sol–gel procedure. The microwave-assisted sol–gel method is most frequently used for obtaining nanocrystalline, monodispersed oxide nanoparticles, or to transform amorphous gels into well-crystallized nanopowders. Less studied is the influence of the microwaves on the sol–gel reactions in solutions. The benefit of using microwave-assisted sol–gel preparation highly depends on the reagents used and on the composition of the studied systems. In the present chapter, results on the influence of the microwaves on the chemical reactions that take place during the sol–gel synthesis and on the properties of the resulted samples are discussed.

Incorporation of Polyaniline Into a Silica Gel Via the Sol-Gel Technique

1990 ◽  
Vol 180 ◽  
Author(s):  
F. Nishida ◽  
B. Dunn ◽  
E.T. Knobbe ◽  
P.D. Fuqua ◽  
R.B. Kaner ◽  
...  
Keyword(s):  
Silica Gel ◽  
Conjugated Polymer ◽  
Sol Gel ◽  
Optical Quality ◽  
Emeraldine Base ◽  
Polar Solvents ◽  
Base Form ◽  
Sol Gel Process ◽  
Gel Technique ◽  
Good Optical Quality

ABSTRACTThe sol-gel process has been used to incorporate a conjugated polymer, polyaniline, in silica gel. The emeraldine base form of the polymer is partially solubility in aprotic polar solvents which are compatible with the sol. The effect of sol environment on the emeraldine base form of polyaniline was investigated. The soluble emeraldine base form is maintained at pH ≥ 2.4 enabling good optical quality gels to be synthesized. The type of alkoxysilane and the water ratio used in preparing the sol influence the solubility of the emeraldine base.

Thio sol–gel synthesis of titanium disulfide thin films and powders using titanium alkoxide precursors

2008 ◽  
Vol 354 (15-16) ◽  
pp. 1801-1807 ◽  
Author(s):  
Alexandru L. Let ◽  
David E. Mainwaring ◽  
Colin Rix ◽  
Pandiyan Murugaraj
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Titanium Alkoxide ◽  
Titanium Disulfide ◽  
Sol Gel Synthesis ◽  
Alkoxide Precursors
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