Research on the Sensitive Electric Properties of La0.9Sr0.1Ga0.8Mg0.2Ox Electrolyte

doi:10.3724/SP.J.1077.2013.12281

Abstract

Abstract:

La_0.9Sr_0.1Ga_0.8Mg_0.2O_x (LSGM) electrolytes were prepared from La_0.9Sr_0.1Ga_0.8Mg_0.2O_xpowders sintering at 1000-1500℃ for 4 h. Both the physical and electrical properties of the LSGM samples were tested. The results show that the linear shrinkage and relative density of the samples increase with sintering temperature rising, besides, the sample sintered at 1400℃ for 4 h shows the maximum value of 24.8% and 97%, respectively. Samples sintered at 1250℃-1500℃ for 4 h have uniform phase while that sintered at 1000℃ has a large amount of impurities. The sample sintered at 1400℃ for 4 h has the largest conductivity being 0.093 S/cm at 800℃. Based on this, a limiting-current-type O₂ sensor based on LSGM was fabricated by screen-printing technique, and the I-V characteristics and response/recovery time were measured. It shows that the I-V curves have good current plateaus, and the limiting current exhibits a linear dependence on oxygen concentration. The response/recovery time are 10-15 s and 15-20 s, respectively, showing well reproducible response characteristics.

Key words: LSGM, conductivity, electrolyte, oxygen sensor

CLC Number:

TP212

GU Yuan-Yuan, CHEN Kang, JIANG Hao, JIAN Jia-Wen. Research on the Sensitive Electric Properties of La_0.9Sr_0.1Ga_0.8Mg_0.2O_x Electrolyte[J]. Journal of Inorganic Materials, 2013, 28(4): 409-414.

Figures/Tables 11

Fig. 1 The limiting-current-type O2 sensor based on LSGM

Fig. 2 Linear shrinkage and relative density curve of LSGM as function of sintering temperature

Fig. 3 Sintering curve of LSGM

Fig. 4 XRD patterns of LSGM sintered at different temperatures for 4 h

Fig. 5 SEM images of LSGM sintered at different temperatures for 4 h

Fig. 6 The equivalent circuit

Fig. 7 The conductivity of LSGM sintered at different temperatures for 4 h

Fig. 8 Arrhenius plots of LSGM sintered at different temperatures for 4 h

Table 1 Fitting parameters

Sintering temperature/℃	A	B	R	E_a/ (kJ·mol^-1)
1300	14.84	-11.98	0.994	99.59
1350	15.24	-12.16	0.997	101.07
1400	14.96	-10.63	0.990	88.36
1450	16.71	-12.68	0.980	105.43
1500	15.99	-11.94	0.990	99.25

Fig. 9 Sensing properties of the O2 sensor based on LSGM in different gas mixtures contained 1%~50% O2 concentration at 650℃

Fig. 10 The response/recovery time curves of O2 sensor

References 10

[1]	Nguyen T L, Kobayashi K, Honda T, et al. Preparation and evaluation of doped ceria interlayer on supported stabilized zirconia electrolyte SOFCs by wet ceramic processes. Solid State Ionics, 2004, 174(1-4): 163-174.
[2]	JIAN Jia-Wen, YANG Bang-Chao, ZHANG Yi-Kang. Aging characteristic of Pt/YSZ electrode structure. Journal of Inorganic Materials, 2004, 19(1): 93-99.
[3]	Keqin Huang, Goodenough John B. A solid oxide fuel cell based on Sr- and Mg-doped LaGaO3 electrolyte: the role of a rare-earth oxide buffer. Journal of Alloys and Compounds, 2000, 303-304(1/2): 454-464.
[4]	Ishihara T, Matsuda H, Takita Y. Doped LaGaO3 perovskite type oxide as a new oxide ionic conductor. J. Am. Chem. Soc., 1994, 116(9): 3801-3806.
[5]	Jacobson Allan J. Materials for solid oxide fuel cells. Chem. Mater., 2010, 22(3): 660-674.
[6]	Wan Jen-Hau, Yan J Q, Goodenough J B. LSGM-based solid oxide fuel cell with 1.4 W/cm2 power density and 30 day long-yerm stability. Electrochem. Soc., 2005, 152(8): A1511-A1515.
[7]	Bi Zhonghe, Matsumoto Hiroshige, Ishihara Tatsumi. Solid-state amperometric CH4 sensor using LaGaO3-based electrolyte. Solid State Ionics, 2008, 179(27-32): 1641-1644.
[8]	衣宝廉. 燃料电池——原理•技术•应用. 北京: 化学工业出版社, 2003: 448-459.
[9]	王常珍. 固体电解质和化学传感器. 北京: 冶金工业出版社, 2000: 33-38.
[10]	刘荣辉. 中温固体氧化物燃料电池材料制备及性能研究. 昆明: 昆明理工大学博士论文, 2007.

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