Citation: QIU Li-Gan, WANG Mao-Yuan, SUN Yu-Feng. Ionic Conduction in Ba_0.9La_0.1Ce_0.9Nd_0.1O_3-α Ceramic[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(4): 838-844. doi: 10.3969/j.issn.1001-4861.2013.00.117 shu

Ionic Conduction in Ba_0.9La_0.1Ce_0.9Nd_0.1O_3-α Ceramic

1.
School of Chemistry and Chemical Engineering, Yancheng Teachers University, Yancheng, Jiangsu 224051, China

Received Date: 20 October 2012
Available Online: 19 November 2012
Fund Project: 江苏省高校“青蓝工程”和江苏省高校自然科学基金(No.07KJB150126)资助项目。 (No.07KJB150126)

Proton-conducting Ba_0.9La_0.1Ce_0.9Nd_0.1O_3-α ceramic was prepared by high temperature solid-state reaction. X-ray powder diffraction pattern (XRD) shows that the material is of a single orthorhombic phase of perovskite-type BaCeO₃. Ionic conduction in the material under different gas atmospheres was studied by using gas concentration cell and ac impendence spectroscopy methods in the temperature range of 500~900℃, respectively, and compared with that of Ba_0.9Ca0.1Ce_0.9Nd_0.1O_3-α. The results indicate that Ba_0.9La_0.1Ce_0.9Nd_0.1O_3-α is a pure protonic conductor with the protonic transport number of 1 in wet hydrogen in the range 500~900℃. In dry air, Ba_0.9La_0.1Ce_0.9Nd_0.1O_3-α is a mixed conductor of oxide ion and electronic hole. The oxide ionic transport numbers are 0.295~0.081. The oxide ionic conductivity of the material is higher than that of Ba_0.9Ca0.1Ce_0.9Nd_0.1O_3-α. In wet air, Ba_0.9La_0.1Ce_0.9Nd_0.1O_3-α is a mixed conductor of proton, oxide ion and electronic hole. The protonic transport numbers are 0.151~0.009, and the oxide ionic transport numbers are 0.300~0.107. The protonic conductivity of the material is lower than that of Ba_0.9Ca0.1Ce_0.9Nd_0.1O_3-α. In hydrogen-air fuel cell, Ba_0.9La_0.1Ce_0.9Nd_0.1O_3-α is a mixed conductor of proton, oxide ion and electron. The ionic transport numbers are 0.964~0.853. The ionic conductivity of the material is close to that of Ba_0.9Ca0.1Ce_0.9Nd_0.1O_3-α.
- Ba_0.9La_0.1Ce_0.9Nd_0.1O_3-α;gas concentration cell;ac impedance;ionic conduction
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Ionic Conduction in Ba0.9La0.1Ce0.9Nd0.1O3-α Ceramic

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通讯作者: 陈斌, bchen63@163.com

Ionic Conduction in Ba_0.9La_0.1Ce_0.9Nd_0.1O_3-α Ceramic