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.

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.

ChemInform Abstract: Preparation of Undoped Lead Titanate Ceramics via Sol-Gel Processing.

ChemInform ◽  
2010 ◽  
Vol 30 (19) ◽  
pp. no-no
Author(s):  
Sunuk Kim ◽  
Myong-cheol Jun ◽  
Soon-cheol Hwang
Keyword(s):  
Lead Titanate ◽  
Sol Gel ◽  
Titanate Ceramics ◽  
Gel Processing

Surface Morphology of Anatase TiO2 Thin Film by Sol-Gel Method

2006 ◽  
Vol 517 ◽  
pp. 135-140 ◽  
Author(s):  
N. Al-Jufairi
Keyword(s):  
Sol Gel ◽  
Titanium Isopropoxide ◽  
Optical Microscope ◽  
Processing Route ◽  
Coating Process ◽  
Coating Films ◽  
Anatase Structure ◽  
Interferometric Technique ◽  
Structure Phase ◽  
Gel Processing

Sol-gel processing route has been used for the production of thin films from titanium isopropoxide (TIP). The surface properties and statistics results have been characterized by AFM; the coating process has been examined using SEM and optical microscope. The structure phase of TiO2 has been analyzed by XRD; the composition of TiO2 has been estimated through EDS; the thickness of film has been measured by polarized microscope in an interferometric technique. The coating films are always crystallined in the anatase structure with circular particles in nanometer size.

Crystallization Behavior in Precursor-Modified Sol-Gel Lead

1992 ◽  
Vol 284 ◽  
Author(s):  
Titanate Powders ◽  
Wei-Heng Shie ◽  
Qing Lu ◽  
Wan Y. Shih
Keyword(s):  
Crystallite Size ◽  
Crystallization Behavior ◽  
Sol Gel ◽  
Weight Percent ◽  
Titanium Isopropoxide ◽  
Structural Units ◽  
X Ray ◽  
Nucleation Sites ◽  
Gel Processing ◽  
Gel Network

ABSTRACTThe molecular structure of precursors in sol-gel processing of PbTiO3 is modified via β-diketone substitution for the isopropyl groups of titanium isopropoxide. Crystallite size and crystallization behavior are studied using x-ray diffractometry and differential thermal analysis. The crystallite size decreases with increasing amount of β-diketone substitution. Whereas the weight percent of crystalline phase first decreases and then increases with increasing β-diketone substitution. Our results indicate that the β-diketone substitution reduces the size of the structural units in the gel network resulting in smaller crystallite size and more nucleation sites in the powders produced.

Sol-Gel Processing and Structure Development of Lead Titanate Particles

1994 ◽  
Vol 346 ◽  
Author(s):  
John S. Wright ◽  
Lorraine Falter Francis
Keyword(s):  
Lead Titanate ◽  
Isopropyl Alcohol ◽  
Perovskite Phase ◽  
Sol Gel ◽  
Amorphous Structure ◽  
Spherical Particles ◽  
Internal Surfaces ◽  
Reflectance Ftir ◽  
Gel Processing ◽  
Gel Network

ABSTRACTSpherical particles of lead titanate, PbTiO3, (PT) were prepared from partially hydrolyzed alkoxide solutions modified with benzoic acid. Modified and aged alkoxide solutions were added dropwise to isopropyl alcohol, forming particles (0.2 to 1.0 μm in diameter). FTIR spectroscopy results demonstrate chelation of the PT alkoxide which prevented the formation of an extended gel network. Diffuse reflectance FTIR (DRIFT) spectra indicate the benzoate ligands are present until 450°C; TGA results show significant weight loss at 450°C. PT particles crystallize into the perovskite phase at =450°C, as determined by DTA and XRD. The relatively low crystallization temperature may be due to the effect of benzoate ligands on amorphous structure and presence of internal surfaces.

Ferroelectric thin films of calcium modified lead titanate by sol-gel processing

1994 ◽  
Vol 13 (24) ◽  
pp. 1804-1805 ◽  
Author(s):  
R. Sirera ◽  
M. L. Calzada ◽  
F. Carmona ◽  
B. Jim�nez
Keyword(s):  
Thin Films ◽  
Lead Titanate ◽  
Sol Gel ◽  
Ferroelectric Thin Films ◽  
Gel Processing

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. 

scholarly journals Sol-gel processing and physic-chemical characterization of La and Ce doped lead titanate ceramics

2013 ◽  
Vol 5 ◽  
pp. 04036
Author(s):  
Y. Guaaybess ◽  
M. Maanan ◽  
R. Adhiri ◽  
M. Moussetad ◽  
A. El Mesbahi ◽  
...  
Keyword(s):  
Lead Titanate ◽  
Sol Gel ◽  
Chemical Characterization ◽  
Titanate Ceramics ◽  
Gel Processing
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