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Title: Corrosion resistant ceramic materials

Ceramic materials which exhibit stability in severely-corrosive environments having high alkali-metal activity, high sulfur/sulfide activity and/or molten halides at temperatures of 200.degree.-550.degree. C. or organic salt (including SO.sub.2 and SO.sub.2 Cl.sub.2) at temperatures of 25.degree.-200.degree. C. These sulfide ceramics form stoichiometric (single-phase) compounds with sulfides of Ca, Li, Na, K, Al, Mg, Si, Y, La, Ce, Ga, Ba, Zr and Sr and show melting-points that are sufficiently low and have excellent wettability with many metals (Fe, Ni, Mo) to easily form metal/ceramic seals. Ceramic compositions are also formulated to adequately match thermal expansion coefficient of adjacent metal components.
Inventors:
 [1]
  1. (320 Willow St., New Lenox, IL 60451)
Issue Date:
OSTI Identifier:
870524
Assignee:
Kaun, Thomas D. (320 Willow St., New Lenox, IL 60451) ANL
Patent Number(s):
US 5538810
Contract Number:
W-31109-ENG-38
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
corrosion; resistant; ceramic; materials; exhibit; stability; severely-corrosive; environments; alkali-metal; activity; sulfur; sulfide; molten; halides; temperatures; 200; degree; -550; organic; salt; including; 25; -200; ceramics; form; stoichiometric; single-phase; compounds; sulfides; na; mg; zr; sr; melting-points; sufficiently; excellent; wettability; metals; easily; metal; seals; compositions; formulated; adequately; match; thermal; expansion; coefficient; adjacent; components; adjacent metal; metal components; ceramic seals; corrosive environment; metal component; expansion coefficient; corrosion resistant; ceramic material; ceramic composition; thermal expansion; ceramic materials; form metal; resistant ceramic; ceramic compositions; sulfide activity; alkali-metal activity; adequately match; ceramics form; molten halides; organic salt; corrosive environments; match thermal; severely-corrosive environments; excellent wettability; form stoichiometric; easily form; exhibit stability; molten halide; severely-corrosive environment; ceramic seal; ceramic mater; /429/