Characterization of chemically bonded composite sol–gel based alumina coatings on steel substrates

2004 ◽  
Vol 176 (2) ◽  
pp. 243-252 ◽  
Author(s):  
H.M Hawthorne ◽  
A Neville ◽  
T Troczynski ◽  
X Hu ◽  
M Thammachart ◽  
...  
Keyword(s):  
Sol Gel ◽  
Alumina Coatings ◽  
Bonded Composite ◽  
Steel Substrates

Fabrication and Characterization of Lithium Tantalate / PZT Composite Thick Film Ultrasonic Transducers

1998 ◽  
Vol 541 ◽  
Author(s):  
Y. Chen ◽  
M. Sayer ◽  
L. Zou ◽  
C.-K. Jen
Keyword(s):  
Sol Gel ◽  
Lithium Tantalate ◽  
Ceramic Composites ◽  
Ultrasonic Transducers ◽  
Impedance Response ◽  
Ceramic Films ◽  
Sol Gel Process ◽  
Pulse Echo ◽  
Steel Substrates

AbstractLithium tantalate (LiTaO3)/PZT ceramic films with thickness above 50 µm have been deposited on stainless steel substrates using a modified sol-gel process. LT powders are dispersed in a PZT sol-gel matrix to form 0-3 ceramic/ceramic composites. The dielectric and impedance response of the LiTaO3/PZT films supported by the substrates has been studied. The pulse echo response of the films as ultrasonic transducers demonstrates a broadband frequency response. The transducers can operate at least up to a temperature of 368°C.

Preparation and Characterization of Pb(Zr,Ti)O3 films prepared by a modified sol-gel route

2012 ◽  
Vol 1449 ◽  
Author(s):  
Dan Jiang ◽  
Chen Zhao ◽  
Shundong Bu ◽  
Jinrong Cheng
Keyword(s):  
Stainless Steel ◽  
Film Thickness ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Single Layer ◽  
Deposition Process ◽  
Crystallite Orientation ◽  
Pzt Films ◽  
Steel Substrates

ABSTRACTPb(Zr0.53Ti0.47)O3 (PZT) films have been fabricated on stainless steel substrates by a Polyvinylpirrolidone (PVP) modified sol-gel route. The single layer of about 0.26 μm was achieved by using the PVP-modified PZT sol, and Crack-free PZT films with thickness of up to 2.37 μm were fabricated by repeating the deposition process. The variations in crystallite orientation, microstructure, dielectric and ferroelectric properties of PZT films were investigated as a function of film thickness. Our results indicate that PZT films prepared on stainless steel substrates maintain good dielectric and ferroelectric properties.

Characterization of New Ionically Conducting Peo-Based Networks by Diffusion, Elasticity Modulus and Ionic Conductivity Measurements

1992 ◽  
Vol 293 ◽  
Author(s):  
Herve Cheradame ◽  
F. Desbat ◽  
P. Mercier-Niddam ◽  
S. Boileau
Keyword(s):  
Diffusion Coefficient ◽  
Ionic Conductivity ◽  
Elasticity Modulus ◽  
Sol Gel ◽  
Cation Transport ◽  
Lithium Cation ◽  
Conductivity Measurements ◽  
Conducting Materials ◽  
Diffusion Studies

AbstractIonically conducting materials containing PEO were prepared from telechelic di(methyl-diethoxy-silane) PEO, synthesized by the hydrosilylation of telechelic diallyl-PEO with methyldiethoxysilane. The network is obtained by the usual sol-gel chemistry. Then, it is filled with LiClO4 by diffusion of the salt and further drying. A comparison is made with the same kind of materials crosslinked using urethane chemistry. Diffusion studies show that the diffusion coefficient of solvent is similar for both types of materials, whilst the ionic conductivity is higher for the networks crosslinked with siloxane bonds. An experiment of diffusion of LiClO4 without solvent showed that this salt has a diffusion coefficient of the order of 2.10-8 cm2.sec-1 at 34°C. The conductivity calculated from this determination is compatible with the mechanism of lithium cation transport by the diffusion of salt molecules. Elasticity modulus measurements show that the salt aggregates are essentially located within the crosslinks at low concentration, but also in the PEO chains for salt concentrations higher than 1 mol/l.

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