Coating processes – Solid particles or fibers applied – Interior or hollow article coating
Patent
1976-09-29
1978-04-04
Gwinnell, Harry J.
Coating processes
Solid particles or fibers applied
Interior or hollow article coating
138145, 138146, 165105, 165133, 427202, 427204, 427205, 427230, 427235, 427376A, 428 36, B05D 722, B05D 136, B05D 302
Patent
active
040828638
ABSTRACT:
A method of forming a porous capillary layer of a metal oxide ceramic material onto a metal oxide ceramic substrate, which comprises covering the surface of the substrate with an aqueous slurry of a powdered mixture comprising the metal oxide of the ceramic substrate, silica and an alkali metal or alkaline-earth metal oxide, the powder mixture having a maximum particle size of about 44 microns, removing excess of slurry, depositing onto the wet surface a layer of granular ceramic material having a particle size of about 250 to about 500 microns, the granular ceramic material being applied in excess relative to the powder of the aqueous slurry to insure that a porous capillary structure will be obtained and causing the slurry to be drawn up between the particles so as to absorb substantially all the slurry, and firing the coated surface at a temperature to effect bonding of the ceramic layer, the powdered constituents of the mixture being proportioned to provide liquid phases at about 200.degree.-300.degree. C above firing temperature. This method finds a particular application in the fabrication of ceramic heat pipes that are made entirely of good dielectric materials and have good heat transfer characteristics with respect to the materials employed.
REFERENCES:
patent: 2149133 (1939-02-01), Cohn
patent: 2337691 (1943-12-01), Stettinius et al.
patent: 2350348 (1944-06-01), Gaugler
patent: 2668783 (1954-02-01), Migley
patent: 3278324 (1966-10-01), Nelson
patent: 3399078 (1968-08-01), Bang
patent: 3476584 (1969-11-01), Randklev et al.
patent: 3539387 (1970-11-01), Kelly et al.
patent: 3560236 (1971-02-01), Orth
patent: 3939295 (1976-02-01), Robertson et al.
patent: 3975165 (1976-08-01), Elbert et al.
Dancy Edna A.
VanSant James H.
Beck Shrive P.
Gwinnell Harry J.
Hydro-Quebec
LandOfFree
Fabrication of ceramic heat pipes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fabrication of ceramic heat pipes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fabrication of ceramic heat pipes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-724582