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Fluorite-perovskite type double-phase mixing conductor oxygen-permeation membrane material and preparation method thereof
The present invention relates to a fluorite-perovskite type double-phase mixing conductor oxygen-permeation membrane material and a preparation method thereof, and belongs to the technical field of comprehensive utilization of resources and ceramic manufacturing. The fluorite-perovskite type double-phase mixing conductor oxygen-permeation membrane material is characterized in that the structure of the oxygen-permeation membrane comprises two phases such as fluorite and perovskite, a sol-gel method is respectively used to prepare the fluorite Ce[1-x]Ln[x]O[2-delta] and the perovskite type Ba[0.95]La[0.05]Fe[1-y]M[y]O[3-delta] powder, the two powders are mixed and grinded according to a certain weight percentage ratio, forming is performed under a certain pressure to obtain a billet, and the billet is calcined for 5-8 h at a temperature of 1110-1250 DEG C so as to obtain the double-phase mixing conductor oxygen-permeation membrane. According to the present invention, the prepared membrane sheet has characteristics of uniform two phase distributed, no impurity phase formation, and good chemical compatibility; the Ce[0.8]Gd[0.2]O[2-delta]-Ba[0.95]La[0.05]Fe[0.90]Nb[0.10] double-phase oxygen-permeation membrane obtains high oxygen-permeation amount of 0.28 mL.cm<-2>.min<-1> at a temperature of 925 DEG C under an air flow rate of 300 ml min<-1> and a helium flow rate of 100 ml min<-1>; and the stable oxygen-permeation amount can be maintained after working for 100 h in a pure carbon dioxide atmosphere, and the material of the present invention is the oxygen-permeation membrane with application potential.
Fluorite-perovskite type double-phase mixing conductor oxygen-permeation membrane material and preparation method thereof
The present invention relates to a fluorite-perovskite type double-phase mixing conductor oxygen-permeation membrane material and a preparation method thereof, and belongs to the technical field of comprehensive utilization of resources and ceramic manufacturing. The fluorite-perovskite type double-phase mixing conductor oxygen-permeation membrane material is characterized in that the structure of the oxygen-permeation membrane comprises two phases such as fluorite and perovskite, a sol-gel method is respectively used to prepare the fluorite Ce[1-x]Ln[x]O[2-delta] and the perovskite type Ba[0.95]La[0.05]Fe[1-y]M[y]O[3-delta] powder, the two powders are mixed and grinded according to a certain weight percentage ratio, forming is performed under a certain pressure to obtain a billet, and the billet is calcined for 5-8 h at a temperature of 1110-1250 DEG C so as to obtain the double-phase mixing conductor oxygen-permeation membrane. According to the present invention, the prepared membrane sheet has characteristics of uniform two phase distributed, no impurity phase formation, and good chemical compatibility; the Ce[0.8]Gd[0.2]O[2-delta]-Ba[0.95]La[0.05]Fe[0.90]Nb[0.10] double-phase oxygen-permeation membrane obtains high oxygen-permeation amount of 0.28 mL.cm<-2>.min<-1> at a temperature of 925 DEG C under an air flow rate of 300 ml min<-1> and a helium flow rate of 100 ml min<-1>; and the stable oxygen-permeation amount can be maintained after working for 100 h in a pure carbon dioxide atmosphere, and the material of the present invention is the oxygen-permeation membrane with application potential.
Fluorite-perovskite type double-phase mixing conductor oxygen-permeation membrane material and preparation method thereof
CHENG HONGWEI (author) / LU XIONGGANG (author) / YAO WEILIN (author) / ZHANG NAIJUN (author) / LUO LONGFEI (author)
2015-08-12
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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