Evaluation of La0.7Ca0.3Cr0.95Zn0.05O3-δ-Gd0.1Ce0.9O2-δ Dual-phase Material and its Potential Application in Oxygen Transport Membrane

doi:10.1016/j.jmst.2014.08.005

J. Mater. Sci. Technol. ›› 2014, Vol. 30 ›› Issue (10): 954-958.DOI: 10.1016/j.jmst.2014.08.005

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Evaluation of La_0.7Ca_0.3Cr_0.95Zn_0.05O_3-δ-Gd_0.1Ce_0.9O_2-δ Dual-phase Material and its Potential Application in Oxygen Transport Membrane

Tenglong Zhu, Zhibin Yang, Minfang Han

Union Research Center of Fuel Cell, State Key Laboratory of Coal Resources and Safe Mining,China University of Mining & Technology, Beijing 100083, China

Received:2014-04-21 Online:2014-10-20 Published:2014-11-04
Contact: Prof., Ph.D.; Tel./Fax: +86 10 62331098.

Abstract

Abstract: In this work, a dual-phase material consisting of La_0.7Ca_0.3Cr_0.95Zn_0.05O_3-δ (LCCZ, 40 wt%) and Gd_0.1Ce_0.9O_2-δ (GDC, 60 wt%) was synthesized. Properties including phase structure, sintering behavior, electrical conductivity and oxygen permeability for LCCZ-GDC were evaluated. The results show that dense LCCZ-GDC dual-phase disks were obtained at the sintering temperature of 1250, 1300, 1350 and 1400 °C by tape casting and high temperature sintering method. The grain sizes of both GDC and LCCZ grew up with the increasing of sintering temperature. The average grain size of GDC was about 0.5, 0.8, 1.4, 1.8 μm while the average grain size of LCCZ was about 0.8, 1.5, 1.8 and 2 μm after sintering at 1250, 1300, 1350 and 1400 °C, respectively. Oxygen flux of LCCZ-GDC decreased with the increase of sintering temperature from 1250 to 1400 °C. The oxygen flux of LCCZ-GDC sintered at 1250 °C reached 0.079 mL/min/cm² at 975 °C with a membrane thickness of 800 μm. Dual-phase material of LCCZ-GDC will be a promising oxygen transport membrane material for its low sintering temperature and good microstructure.

Key words: Dual-phase material, Tape casting, Sintering temperature, Oxygen transport membrane

Tenglong Zhu, Zhibin Yang, Minfang Han. Evaluation of La_0.7Ca_0.3Cr_0.95Zn_0.05O_3-δ-Gd_0.1Ce_0.9O_2-δ Dual-phase Material and its Potential Application in Oxygen Transport Membrane[J]. J. Mater. Sci. Technol., 2014, 30(10): 954-958.

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Evaluation of La_0.7Ca_0.3Cr_0.95Zn_0.05O_3-δ-Gd_0.1Ce_0.9O_2-δ Dual-phase Material and its Potential Application in Oxygen Transport Membrane

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