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Title: Use of impure inert gases in the controlled heating and cooling of mixed conducting metal oxide materials

Patent ·
OSTI ID:1062987

Method for processing an article comprising mixed conducting metal oxide material. The method comprises contacting the article with an oxygen-containing gas and either reducing the temperature of the oxygen-containing gas during a cooling period or increasing the temperature of the oxygen-containing gas during a heating period; during the cooling period, reducing the oxygen activity in the oxygen-containing gas during at least a portion of the cooling period and increasing the rate at which the temperature of the oxygen-containing gas is reduced during at least a portion of the cooling period; and during the heating period, increasing the oxygen activity in the oxygen-containing gas during at least a portion of the heating period and decreasing the rate at which the temperature of the oxygen-containing gas is increased during at least a portion of the heating period.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-98FT40343
Assignee:
Air Products and Chemicals, Inc. (Allentown, PA)
Patent Number(s):
8,246,719
Application Number:
12/567,167
OSTI ID:
1062987
Country of Publication:
United States
Language:
English

References (2)

Chemical Expansivity of Electrochemical Ceramics journal September 2001
Prospects and problems of dense oxygen permeable membranes journal February 2000

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