Compositions: coating or plastic – Coating or plastic compositions – Heavy metal compound containing
Patent
1993-07-28
1995-04-18
Stoll, Robert L.
Compositions: coating or plastic
Coating or plastic compositions
Heavy metal compound containing
252309, 2523131, 501 12, C09K 300, B01J 1300
Patent
active
054074797
ABSTRACT:
.beta.-Al.sub.2 TiO.sub.5 protective coatings have been developed for both dense and porous ceramics such as SiC and Si.sub.3 N.sub.4 using a chemical solution processing method involving the hydrolysis and condensation of aluminum tri-sec butoxide and titanium butoxide. The solution viscosities, pH values, H.sub.2 O/alkoxide molar ratios, and dip coating withdrawal rates required for crack-free .beta.-Al.sub.2 TiO.sub.5 are 1.0 to 6.2 cP, pH 1-4.5, molar ratio 1.5-10, and withdrawal rate of 2.2-8.0 cm/min, respectively. Conversion of the amorphous coating to crystalline .beta.-Al.sub.2 TiO.sub.5 is achieved by a succession of calcination below 450.degree. C. and a final heat-treatment at 1300.degree. C. for ten hours with controlled heating and cooling rates.
REFERENCES:
patent: 5047174 (1991-09-01), Sherif
Okamura et al., "Preparation and Sintering of Monosized A12O3-TiO2 Composite Powder", J. Am. Ceram. Soc., 69(2) C-22-C-24 (1986).
Prasadarao et al., "Enhanced Densification By Seeding of Sol-Gel Derived Aluminum-Titanate", J. Am Ceram. Soc., 75(6) 1529-33 (1992).
Derwent Abstract AN 77-76968Y/43 (corresponding to J52-111285).
Brown Nancy R.
Brown, Jr. Jesse J.
Sun Tawei
Metzmaier Daniel S.
Stoll Robert L.
The Center for Innovative Technology
Virginia Polytechnic Institute & State University
LandOfFree
Sol-gel .beta.-aluminum titanate thin film coating does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sol-gel .beta.-aluminum titanate thin film coating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sol-gel .beta.-aluminum titanate thin film coating will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-64344