Sol-Gel Synthesis of Lead Titanate Fibres for Use in the Fabrication of Piezoceramic-Polymer Composites

1990 ◽  
Vol 180 ◽  
Author(s):  
H. Janusson ◽  
C.E. Millar ◽  
S.J. Milne
Keyword(s):  
Polymer Composites ◽  
Lead Titanate ◽  
Lead Acetate ◽  
Strong Influence ◽  
Sol Gel ◽  
Titanium Isopropoxide ◽  
Polymeric Gels ◽  
Sol Gel Synthesis

ABSTRACTLead titanate fibres for use in piezoceramic-polymer composites have been prepared by extrusion of polymeric gels. The gels are formed from solutions of lead acetate, titanium isopropoxide and 2-methoxyethanol. The concentration of the solution, and amount of water and acid added, proved to have a strong influence on the suitability of the gel for extrusion purposes. The drying and firing conditions have been altered to obtain dense, fully crystalline PbTiO3 fibres of 100 μm diameter.

Nmr Spectroscopic Investigations of Pbtio3 Sol-Gel Processing

1990 ◽  
Vol 180 ◽  
Author(s):  
S.D. Ramamurthi ◽  
D.A. Payne
Keyword(s):  
Lead Titanate ◽  
Lead Acetate ◽  
Sol Gel ◽  
Titanium Isopropoxide ◽  
Alkoxy Group ◽  
Mass Spectrometric ◽  
Titanium Complex ◽  
Spectroscopic Investigations ◽  
Gel Processing ◽  
Mass Spectrometric Techniques

ABSTRACTLead titanate gels were prepared by sol-gel processing from lead acetate and titanium isopropoxide in methoxyethanol. In the present study, 1H, and 13C FTNMR spectroscopic and mass spectrometric techniques were used to identify the structures of lead and titanium precursors formed by refluxing lead acetate and titanium isopropoxide in methoxyethanol, respectively. Lead acetate was found to be partially alkoxylated, whereas, the titanium precursor was identified as a dimer with complete alkoxy group exchange. Similar procedures were applied to identify the lead titanium complex formed from lead and titanium precursors.

Sol-Gel Processing of PbTiO3 Fibers

1990 ◽  
Vol 180 ◽  
Author(s):  
S.I. Aoki ◽  
S. C. Choi ◽  
D.A. Payne ◽  
H. Yanagida
Keyword(s):  
Lead Titanate ◽  
Lead Acetate ◽  
Chelating Agents ◽  
Elevated Temperatures ◽  
Sol Gel ◽  
Titanium Isopropoxide ◽  
Pyroelectric Effect ◽  
Hydrolysis And Condensation ◽  
Ceramic Microstructure ◽  
Gel Processing

ABSTRACTLead titanate fibers were formed from lead acetate and titanium isopropoxide by sol-gel methods. Additions of acids and chelating agents were used to influence hydrolysis and condensation reactions. A variety of solvents were examined, and the effect of conditioning treatments at elevated temperatures were investigated. Data are reported for the rheological behavior of viscous sols, fiber drawing ability, pyrolysis and crystallization of gels and fibers. Features of the ceramic microstructure are reported. A pyroelectric effect was measured for PbTiO3 fibers.

scholarly journals 1D TiO2 Nanostructures Prepared from Seeds Presenting Tailored TiO2 Crystalline Phases and Their Photocatalytic Activity for Escherichia coli in Water

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Julieta Cabrera ◽  
Dwight Acosta ◽  
Alcides López ◽  
Roberto J. Candal ◽  
Claudia Marchi ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Photocatalytic Activity ◽  
Bactericidal Activity ◽  
Sol Gel ◽  
Titanium Isopropoxide ◽  
E Coli ◽  
1D Nanostructures ◽  
Sol Gel Synthesis ◽  
Hydrolysis Of ◽  
Tio2 Nanostructures

TiO2 nanotubes were synthesized by alkaline hydrothermal treatment of TiO2 nanoparticles with a controlled proportion of anatase and rutile. Tailoring of TiO2 phases was achieved by adjusting the pH and type of acid used in the hydrolysis of titanium isopropoxide (first step in the sol-gel synthesis). The anatase proportion in the precursor nanoparticles was in the 3–100% range. Tube-like nanostructures were obtained with an anatase percentage of 18 or higher while flake-like shapes were obtained when rutile was dominant in the seed. After annealing at 400°C for 2 h, a fraction of nanotubes was conserved in all the samples but, depending on the anatase/rutile ratio in the starting material, spherical and rod-shaped structures were also observed. The photocatalytic activity of 1D nanostructures was evaluated by measuring the deactivation of E. coli in stirred water in the dark and under UV-A/B irradiation. Results show that in addition to the bactericidal activity of TiO2 under UV-A illumination, under dark conditions, the decrease in bacteria viability is ascribed to mechanical stress due to stirring.

scholarly journals Sol–gel synthesis and characterization of lead titanate films

2015 ◽  
Vol 1 (1) ◽  
pp. 1075323
Author(s):  
Vijendra A. Chaudhari ◽  
Govind K. Bichile
Keyword(s):  
Lead Titanate ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Sol Gel Synthesis

scholarly journals PEMBUATAN LAPISAN TIPIS DAN SERBUK TIMBAL TITANAT DENGAN METODA SOL GEL

2015 ◽  
Vol 1 (1) ◽  
pp. 31
Author(s):  
Rahmayeni ◽  
Emriadi ◽  
Eli Susanti ◽  
Delfi Silvia
Keyword(s):  
Thin Layer ◽  
Glass Substrate ◽  
Lead Titanate ◽  
Lead Acetate ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sol Gel Process ◽  
Infra Red ◽  
Scanning Electron

 ABSTRACT Thin layer and powder of lead titanate had been prepared using lead acetate and tetraethylorthotitanate as precursor by sol gel process. The thin layer of composite was obtain through layering the composite on glass substrate. Both thin layer and powder were calcined between 100-700°C and were characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), UV and Fourier Transform Infra Red (FTIR). The diffraction pattern show that the structure of composite on glass substrate is amorf at 500°C and could not identified at 700°C while the powder is crystalline at 500 and 700°C. FTIR spectra shown the Ti-O peak at 1407 cm-1, the Pb-O and Pb-O-Ti peaks at 718 and 600 cm-1, respectively. 

Comparison of Titanium Precursors in the Sol-Gel Synthesis of Pb0.5Ba0.5TiO3 Powders and Thin Films

2003 ◽  
Vol 784 ◽  
Author(s):  
Stacey W. Boland ◽  
Sossina M. Haile
Keyword(s):  
Thin Films ◽  
Pyrolysis Temperature ◽  
Sol Gel ◽  
Lead Nitrate ◽  
Chelating Agent ◽  
Precursor Chemistry ◽  
Titanium Isopropoxide ◽  
Ferroelectric Material ◽  
Titanium Butoxide ◽  
Sol Gel Synthesis

ABSTRACTTwo sol-gel processes for producing Pb1-xBaxTiO3 (PBT), a ferroelectric material of interest for sensor and actuator applications, are investigated. Each system incorporates lead nitrate and barium acetate as metal sources and ethylene glycol as a solvent. Diethanolamine is used as a chelating agent for titanium isopropoxide or titanium butoxide. Precursor chemistry was systematically varied and the resulting sols and powders were studied using TGA/DSC, FTIR, and XRD. Thin films were prepared using both precursor sources by spin coating onto single crystal (100) MgO. Spin speed and pyrolysis temperature were optimized to produce oriented thin films with thicknesses of up to approximately 500nm. Sols incorporating titanium isopropoxide and a large excess of diethanolamine were particularly stable against hydrolysis.

Sol-Gel Synthesis of SiO2-TiO2 Film as Antireflection Coating on Silicon for Photovoltaic Application

2009 ◽  
Vol 609 ◽  
pp. 221-224 ◽  
Author(s):  
S. Kermadi ◽  
N. Agoudjil ◽  
Samira Sali ◽  
R. Tala-Ighil ◽  
M. Boumaour
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
Titanium Isopropoxide ◽  
Dip Coating ◽  
Antireflection Coating ◽  
Silicon Wafers ◽  
Monocrystalline Silicon ◽  
Optical Parameters ◽  
Sol Gel Process ◽  
Sol Gel Synthesis

Application of thin films of SiO2 and TiO2 using the sol-gel process were utilized as antireflection coating on monocrystalline silicon wafers. The aim of this study is to validate this process as a procedure to prepare antireflective films for monocrystalline silicon by dip-coating. The coating was carried out by dip-coating process using tetraethoxysilane (TEOS) as precursor for SiO2 and titanium isopropoxide (TIPT) as precursor for TiO2. In order to study the influence of the thickness on the reflectance and the optical parameters, several coatings with different thickness were deposited onto silicon wafers. The refractive index and the thickness were adjusted by controlling the number of dipping. The refractive index increases from 2.10 up to 2.22 by increasing the film thickness from 36 to 137 nm. It was found that the sample coated with two layers exhibits a lower reflection (1.86 % at λ = 602 nm). This result was improved by a single sub-layer of SiO2 (36.75 nm) to reach 1.08 % at λ = 674 nm). Furthermore, the low values of the extinction coefficient (k) (approach to Zero at λ = 632.8 nm) indicate that TiO2 and SiO2 films deposited by sol-gel method can be used as ARC for Si solar cells.

scholarly journals Novel Sol-Gel Synthesis of Spherical Lead Titanate Submicrometer Powders

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 484
Author(s):  
Radhouane Bel-Hadj-Tahar ◽  
Mohamed Abboud ◽  
Mohd. Shkir ◽  
Abdullah Alhanash ◽  
Ali Eisa M. Anqi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Lead Titanate ◽  
Sol Gel ◽  
Particle Morphology ◽  
Submicron Particles ◽  
X Ray Diffraction ◽  
Synthetic Process ◽  
Transmission Electron ◽  
Autogenous Pressure ◽  
Sol Gel Synthesis

In this study, a novel and simple synthetic sol-gel procedure was established to directly prepare spherical lead titanate powders without prior synthesis/usage of spherical templates such as TiO2 particles. Isotropic submicron particles with a mean diameter of 1–4 μm were prepared in this way. This synthetic process takes advantage of acetone as a stabilizing ligand and autogenous pressure generated in the autoclave during the reaction. The influence of various experimental factors (nature of the ligand, thermal treatment mode, and post-calcining temperature) as well as the formation mechanism were studied. Scanning electron microscopy and transmission electron microscopy were used to explore the particle morphology. The crystalline phases were explored and identified by X-ray diffraction analysis.

A facile sol–gel synthesis of impurity-free nanocrystalline titania

2014 ◽  
Vol 16 (22) ◽  
pp. 10614-10619 ◽  
Author(s):  
Alexandr V. Vinogradov ◽  
Al'ena V. Ermakova ◽  
Mikhail F. Butman ◽  
Evamarie Hey-Hawkins ◽  
Vladimir V. Vinogradov
Keyword(s):  
Low Temperature ◽  
Aqueous Medium ◽  
Sol Gel ◽  
Titanium Isopropoxide ◽  
Nanocrystalline Titania ◽  
Hydrolysis Products ◽  
Ultrasonic Assisted ◽  
Sol Gel Synthesis

A low-temperature ultrasonic-assisted method is used to prepare nanocrystalline TiO2 sol–gel materials from hydrolysis products of titanium isopropoxide in aqueous medium with no addition of modifying agents.

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