Fluxed lanthanum chromite for low temperature air firing

Details Fluxed lanthanum chromite for low temperature air firing Fluxed lanthanum chromite for low temperature air firing

1992-11-25

1994-03-29

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

501126, 501132, 423352, 423592, 423595, 423604, 423606, 423622, 264 82, 264 83, C04B 3504, C04B 3551, C01G 3900

Patent

active

052984699

ABSTRACT:
A lanthanum chromite ceramic powder consisting essentially of 1 mol of LaCr.sub.1-x M.sub.x O.sub.3, where M is a divalent metal selected from the group of zinc, copper and mixtures thereof and x ranges from about 0.02 to 0.2, y mols of B.sub.2 O.sub.3, where y ranges from 0.0005 to 0.04, and z mols of La.sub.2 O.sub.3, where the ratio z/y ranges from 1 to 3, the powder is sintered to high density by firing a compact thereof at a temperature of about 1400.degree. C. in air or other atmosphere, and is particularly suited for use as interconnect material for solid oxide fuel cells.

REFERENCES:
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patent: 5169811 (1992-12-01), Cipollini et al.
patent: 5185301 (1993-02-01), Li et al.
Groupp & Anderson, "Densification of La.sub.1-x Sr.sub.x CrO.sub.3 ", J. Am. Cer. Soc., 59, p. 449 (1976).
Meadowcroft & Wimmer, "Oxidation and Vaporization Processes in Lanthanum Chromite", Am. Ceram. Soc. Bull., vol. 58, pp. 610-613 (1979).
Vidyasagar et al. "Synthesis of Complex Metal Oxides Using Hydroxide, Cyanide and Nitrate Solid-Solution Precursors", J. Solid State Chem., 58, 29-37 (1985).
Hayashi et al. "Sintering of lanthanum chromite doped with zinc or copper", J. Mater. Sci. Lett., vol. 7, pp. 457-458 (1988).

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