Sol-Gel Deposition Processes of Thin Ceramic Films

There is increasing interest in composites containing zirconia because of their high strength, fracture toughness, and its great influence on the chemical durability in glass. For the zirconia-silica system, monolithic glasses, fibers and coatings have been obtained. There is currently a great interest in designing zirconia-toughened alumina including exploration of the processing methods and the toughening mechanism.The possibility of forming nanocrystal composites by a phase separation method has been investigated in three systems: zirconia-alumina, zirconia-silica and zirconia-titania using HREM. The morphological observations initially suggest that the formation of nanocrystal composites by a phase separation method is possible in the zirconia-alumina and zirconia-silica systems, but impossible in the zirconia-titania system. The separation-produced grain size in silica-zirconia system is around 5 nm and is more uniform than that in the alumina-zirconia system in which the sizes of the small polyhedron grains are around 10 nm. In the titania-zirconia system, there is no obvious separation as was observed in die alumina-zirconia and silica-zirconia system.

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Erratum to “Preparation and properties of ZnO-based ceramic films for low-voltage varistors by novel sol–gel process”

Materials Science and Engineering B ◽

10.1016/s0921-5107(02)00144-7 ◽

2002 ◽

Vol 96 (1) ◽

pp. 69

Author(s):

Huang Yanqiu ◽

Liu Meidong ◽

Zeng Yike ◽

Li Churong ◽

Xia Donglin ◽

...

Keyword(s):

Low Voltage ◽

Sol Gel ◽

Ceramic Films ◽

Sol Gel Process

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Integration of Porous Silicon with Sol-Gel Derived Ceramic Films

MRS Proceedings ◽

10.1557/proc-768-g3.7 ◽

2003 ◽

Vol 768 ◽

Cited By ~ 2

Author(s):

S. Stolyarova ◽

B. Malic ◽

S. Javoric ◽

A. El-Bahar ◽

M. Kosec ◽

...

Keyword(s):

Porous Silicon ◽

Protective Coatings ◽

Sol Gel ◽

Silicon Layer ◽

Precursor Solution ◽

Solution Concentration ◽

Porous Silicon Layer ◽

Buffer Layers ◽

Adhesive Interaction ◽

Ceramic Films

AbstractDirect integration of sol-gel derived ceramic films with porous silicon, without buffer layers, has been demonstrated. The effects of ceramic type, solvent type, solution concentration, as well as, porous silicon layer thickness, porosity and preparation conditions, on the quality and microstructure of sol-gel films/porous silicon integrated systems have been studied. The following ceramic compositions have been applied to porous silicon as protective coatings: PZT (PbZr0.3Ti0.7O3), PLZT (Pb0.925La0.055Zr0.3Ti0.7O3), ZrO2, TiO2, with 2-methoxyethanol and 2-ethoxyethanol solvents, 0.5 and 0.1 M precursor solution concentrations. The LSCO (La0.5Sr0.5CO.3) water based sol-gels have been deposited for electroconductive purposes.The best compositions for integration, giving transparent, mirror-like, uniform ceramic films with fine morphology and strong adhesion, were found to be the TiO2 and ZrO2 as well as, the diluted (0.1 M) PZT (PbZr0.3Ti0.7O3) sol-gel precursors. Conductive LSCO sol-gel derived films showed improved wetting and stronger adhesive interaction with porous silicon, as compared to polished silicon wafers.

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Characterization and tribological investigation of sol–gel ceramic films on Ti–6Al–4V

Wear ◽

10.1016/j.wear.2005.05.006 ◽

2006 ◽

Vol 260 (4-5) ◽

pp. 379-386 ◽

Cited By ~ 24

Author(s):

Wenguang Zhang ◽

Chengtao Wang ◽

Weimin Liu

Keyword(s):

Sol Gel ◽

Ceramic Films

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Tribological investigations of sol-gel ceramic films

Science in China Series B Chemistry ◽

10.1360/02yb9012 ◽

2002 ◽

Vol 45 (1) ◽

pp. 84 ◽

Cited By ~ 2

Author(s):

Wenguang ZHANG

Keyword(s):

Sol Gel ◽

Ceramic Films

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Macroporous and nanosized ceramic films prepared by modified sol-gel method with PMMA microsphere templates

Journal of the European Ceramic Society ◽

10.1016/s0955-2219(03)00518-1 ◽

2004 ◽

Vol 24 (6) ◽

pp. 1961-1967 ◽

Cited By ~ 28

Author(s):

Kazuhiro Sasahara ◽

Takeo Hyodo ◽

Yasuhiro Shimizu ◽

Makoto Egashira

Keyword(s):

Sol Gel ◽

Gel Method ◽

Sol Gel Method ◽

Ceramic Films ◽

Pmma Microsphere

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

MRS Proceedings ◽

10.1557/proc-541-647 ◽

1998 ◽

Vol 541 ◽

Cited By ~ 1

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.

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Sol-Gel Deposition of Electronic Ceramic Films.

MRS Proceedings ◽

10.1557/proc-180-453 ◽

1990 ◽

Vol 180 ◽

Cited By ~ 1

Author(s):

J.M. Bell ◽

B. Ben-Nissan ◽

M. Anast ◽

B.O. West ◽

L. Spiccia ◽

...

Keyword(s):

Sol Gel ◽

Barium Copper Oxide ◽

Ceramic Coatings ◽

Dip Coating ◽

Barium Copper ◽

Ceramic Films ◽

Coating Method ◽

Yttrium Barium ◽

Processing Defects ◽

Dip Coating Method

ABSTRACTWe describe a dip-coating method of depositing thin electronic ceramic coatings on various substrates from sol-gel solutions. The solutions we use are alkoxide-based, although the specific formulations depend on the system being deposited. We are working with two electronic ceramic systems: barium titanate on glass, and alumina, and yttrium barium copper oxide on alumina. We discuss methods used to reduce and remove processing defects such as crazing, cracking and pin-holing. We are also studying the effects of varying the processing conditions (dipping, hydrolysis and firing) on the electronic properties of the films. Initial results on BaTiO3 indicate that it is better to deposit thin films (∼0.1 – 0.2μm) and build up the coating thickness by repeated dipping.

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