Electric heating – Microwave heating – With diverse device
Patent
1993-03-25
1995-09-12
Leung, Philip H.
Electric heating
Microwave heating
With diverse device
219762, 219756, 264489, H05B 680
Patent
active
054498872
ABSTRACT:
Superior microwave transparent thermal insulations for high temperature microwave sintering operations were prepared. One embodiment of the thermal insulation comprises granules of boron nitride coated with a very thin layer of glassy carbon made by preparing a glassy carbon precursor and blending it with boron nitride powder to form a mixture. The blended mixture is granulated to form a grit which is dried and heated to form the granules of boron nitride coated with a glassy carbon. Alternatively, grains of glassy carbon are coated with boron nitride by blending a mixture of a slurry comprising boron nitride, boric acid binder, and methyl alcohol with glassy carbon grains to form a blended mixture. The blended mixture is dried to form grains of glassy carbon coated with boron nitride. In addition, a physical mixture of boron nitride powder and glassy carbon grains has also been shown to be an excellent thermal insulation material for microwave processing and sintering.
REFERENCES:
patent: 4559429 (1985-12-01), Holcombe
patent: 4565747 (1986-01-01), Nakae et al.
patent: 4743340 (1988-05-01), Wrenn et al.
patent: 4770930 (1988-09-01), Wrenn et al.
patent: 4810846 (1989-03-01), Holcome et al.
patent: 4880578 (1989-11-01), Holcombe et al.
patent: 4963709 (1990-10-01), Kimrey, Jr.
patent: 5072087 (1991-12-01), Apte et al.
patent: 5154779 (1992-10-01), Holcombe et al.
patent: 5164130 (1992-11-01), Holcombe et al.
patent: 5227600 (1993-07-01), Blake et al.
Cressie E. Holcombe, "New Microwave Coupler Material", American Ceramic Society Bullentin, vol. 62, No. 12, p. 1388 (Dec. 1983).
Dr. Rainer Duben, "Glassy Carbon--A Material For Use In Analytical Chemisty", Sigri Corporation, pp. 1-4.
"Calcined Petroleum Coke Flour and Particles", Great Lakes Carbon Corporation, Price List, pp. 1-2, Nov. 17, 1989.
"Vitreous Carbon", Atomergic Chemcials Co., pp. 1-5.
A. Greenville Whittaker and B. Tooper, "Single-Crystal Diffraction Pattersn For Vitreous Carbon", Jr. Am. Cer. Soc., vol. 57, No. 10, pp. 443-446 (Oct. 1974).
"Carbon (Carbon and Artificial Graphite)--Glassy Carbon", Encyclopedia of Chemical Technology, p. 630.
Dykes Norman L.
Holcombe Cressie E.
Morrow Marvin S.
Adams Harold W.
Ericson Ivan aL.
Leung Philip H.
Martin Marietta Energy Systems Inc.
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