Chapter 10. Interface (Cell, Gel, Surface) and Biocompatibility in Gel Processing

Sol-gel processing of La2Zr2O7 (LZO) buffer layers on biaxially textured Ni–1.7% Fe–3% W alloy substrates using a continuous reel-to-reel dip-coating unit has been studied. The epitaxial LZO films obtained have a strong cube texture and uniform microstructure. The effects of increasing the annealing speed on the texture, microstructure, and carbon content retained in the film were studied. On top of the LZO films, epitaxial layers of yttria-stabilized zirconia and Ceria (CeO2) were deposited using rf sputtering, and YBa2Cu3Ox (YBCO) films were then deposited using pulsed laser deposition. Critical current densities (Jc) of 1.9 MA/cm2 at 77 K and self-field and 0.34 MA/cm2at 77 K and 0.5 T have been obtained on these films. These values are comparable to those obtained on YBCO films deposited on all-vacuum deposited buffer layers and the highest ever obtained using solution seed layers.

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Effect of acetylacetone on the preparation of PZT materials in sol–gel processing

Materials Science and Engineering B ◽

10.1016/s0921-5107(02)00384-7 ◽

2002 ◽

Vol 96 (3) ◽

pp. 307-312 ◽

Cited By ~ 27

Author(s):

Luqian Weng ◽

Xujin Bao ◽

Kwesi Sagoe-Crentsil

Keyword(s):

Sol Gel ◽

Gel Processing

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Diamond Machinable Sol-Gel Silica Based Hybrid Coatings for High Precision Optical Molds

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.438.65 ◽

2010 ◽

Vol 438 ◽

pp. 65-72 ◽

Cited By ~ 6

Author(s):

Andreas Mehner ◽

Ju An Dong ◽

Timo Hoja ◽

Torsten Prenzel ◽

Yildirim Mutlugünes ◽

...

Keyword(s):

Injection Molding ◽

High Precision ◽

Sol Gel ◽

Processing Parameters ◽

Hybrid Coatings ◽

Optical Elements ◽

Optical Components ◽

New Approach ◽

Free Silica ◽

Gel Processing

The demand for high precision optical elements as micro lens arrays for displays increases continually. Economic mass production of such optical elements is done by replication with high precision optical molds. A new approach for manufacturing such molds was realized by diamond machinable and wear resistant sol-gel coatings. Crack free silica based hybrid coatings from base catalyzed sols from tetraethylorthosilicate (TEOS: Si(OC2H5)4) and methyltriethoxysilane (MTES: Si(CH3)(OC2H5)3) precursors were deposited onto pre-machined steel molds by spin coating process followed by a heat treatment at temperatures up to 800°C. Crack-free multilayer coatings with a total thickness of up to 18 µm were achieved. Micro-machining of these coatings was accomplished by high precision fly cutting with diamond tools. Molds with micro-structured coatings were successfully tested for injection molding of PMMA optical components. The wear resistance of the coatings was successfully tested by injection molding of 1000 PMMA lenses. Hardness and elastic modulus of the coatings were measured by nano indentation. The chemical composition was measured by X-ray photo electron spectroscopy (XPS) as a function of the sol-gel processing parameters.

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An investigation into the factors affecting the sol-gel processing of PZT thin layers

[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics ◽

10.1109/isaf.1990.200346 ◽

2002 ◽

Cited By ~ 1

Author(s):

C.D.E. Lakeman ◽

J.-F. Campion ◽

C.T.A. Suchicital ◽

D.A. Payne

Keyword(s):

Sol Gel ◽

Thin Layers ◽

Factors Affecting ◽

Gel Processing

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Metallkomplexe in Anorganischen Matrices, 5 [1] / Metal Complexes in Inorganic Matrices, 5 [1]

Zeitschrift für Naturforschung B ◽

10.1515/znb-1991-0614 ◽

1991 ◽

Vol 46 (6) ◽

pp. 783-788 ◽

Cited By ~ 6

Author(s):

Christian Egger ◽

Ulrich Schubert

Keyword(s):

Acetic Acid ◽

Metal Complexes ◽

Phenylacetic Acid ◽

Sol Gel ◽

Rhodium Complex ◽

Gel Processing ◽

Inorganic Matrices

A heterogenized rhodium complex, prepared by sol-gel processing of Rh(CO)Cl[PPh2CH2CH2Si(OEt)3]2 and Si(OEt)4, is shown to catalyze the conversion of the silanes H4-nSiPh„ (n = 1 - 3) or (HMe2Si)2O to (poly)siloxanes by air or water. Using THF as a solvent, the silanoles Ph3SiOH or Ph2Si(OH)2 are obtained instead. The reaction of phenylacetic acid or acetic acid with HSiPh3 to give silyl esters is catalyzed by the same compound.

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