Preparation and Electrical Properties of LaGaO<sub>3</sub>-based Rare Earth Composite Oxides Doped with Multielement

ZHAO Jie; WANG Zhi-qi; MA Yong-chang; MA Xu; BAO Jun-cheng; LIU Ji-wen

Materials and Mechanical Engineering > 2009 > 33(3): 35-38.

ZHAO Jie, WANG Zhi-qi, MA Yong-chang, MA Xu, BAO Jun-cheng, LIU Ji-wen. Preparation and Electrical Properties of LaGaO₃-based Rare Earth Composite Oxides Doped with Multielement[J]. Materials and Mechanical Engineering, 2009, 33(3): 35-38.

Citation:

PDF (729 KB)

Preparation and Electrical Properties of LaGaO₃-based Rare Earth Composite Oxides Doped with Multielement

More Information

Received Date: August 19, 2008

Graphical Abstract

Abstract

Abstract

LaGaO3-based rare earth composite oxides of La0.8Sr0.2Ga0.72Mg0.20Fe0.08O2.8(LSGMF) and La0.8Sr0.2Ga0.72Mg0.20Co0.08O2.8(LSGMC) doped with Sr,Mg and Fe or Co were synthesized by improved solid reaction method.The composition,phase structure and microstructure of LSGMF and LSGMC samples were analyzed by means of EDS,XRD and SEM.The electrical conductivities of LSGMF and LSGMC as a function of the temperature were measured by DC four-probe technique in the temperature range of 350-850 ℃.The results show that a single phase material of orthorhombic perovskite-type structure was formed after sintering in air at 1 400 ℃ in LSGMF and LSGMC.Other impurity elements were not found except for small amount of Ca in LSGMF and LSGMC samples.The relationship between temperature and the conductivity of LSGMF and LSGMC conformed to the Arrhenius equation in the temperature range of 350-500 ℃ and 500-850 ℃.The activation energies of LSGMF and LSGMC were low at 350-500 ℃(Ea<0.3 eV).The conductivities of LSGMF and LSGMC were considerably increased compared with Sr,Mg-doped LSGM.
- LaGaO3,
- multielement doping,
- transition metal,
- rare earth composite oxide

FullText(HTML)

References (18)

References

[1]	MASAYUKI D.SOFC system and technology[J].Solid State Ionics,2002,152/153:383-392.
[2]	卢俊彪,张中大,唐子龙.固体氧化物燃料电池的研究进展[J].稀有金属材料与工程,2005,34(8):1177-1180.
[3]	ST-PIERRE J,WILKINSON D P.Fuel cells:a new,efficient and cleaner power source[J].AIChE Journal,2001,47(7):1482-1487.
[4]	黄建兵,杨立寨,彭冉冉,等.新型低温固体氧化物燃料电池研究进展[J].太阳能学报,2005,26(1):134-140.
[5]	孙明涛,孙俊才,季世军.固体氧化物燃料电池的中低温研究[J].稀有金属,2004,28(6):1065-1069.
[6]	李勇,邵刚勤,段兴龙,等.固体氧化物燃料电池电解质材料的研究进展[J].硅酸盐通报,2006(1):42-45.
[7]	田长安,曾燕伟.中低温SOFC电解质材料的研究新进展[J].电源技术,2006,30(4):329-333.
[8]	ISHIHARA T,SHIBAYAMA T,NISHIGUCHI H,et al.Oxide ion conductivity in La0.8Sr0.2Ga0.8Mg0.2-xNixO3 perovskite oxide and application for the electrolyte of solid oxide fuel cells[J].Mater Sci,2001,36:1125.
[9]	赵捷,王志奇,包俊成,等.ABO3型固体电解质复合氧化物的La1-xSrxGa1-yMgyO3-δ的制备与导电性[J].哈尔滨工业大学学报,2006,38(9):1597-1600.
[10]	SHKERIN S N,BRONIN D I,KOVYAZINA S A,et al.Structure and phase transitions of (La,Sr)(Ga,Mg)O3-α.solid electrolyte[J].Solid State Ion,2004,171:129-132.
[11]	赵捷,王志奇,包俊成,等.复合氧化物的La1-xSrxGa1-yMgyO3-δ的结构与电性能研究[J].天津理工大学学报,2006,22(3):34-38.
[12]	张乃庆,孙克宁,吴宁宁,等.镓酸镧固体电解质制备方法的研究进展[J].电子工业技术,2004,25(3):99-102.
[13]	DJURADO E,LABEAU M.Second phase in doped lanthanum gallate perovskite[J].J Eur Ceram Soc,1998,18:1397-1404.
[14]	王德,丛立功,贺强,等.湿化学法合成钙钛矿结构中温电解质La0.8Sr0.2Ga0.85Mg0.15O3-δ及其性能研究[J].中国稀土学报,2004,22(2):238-242.
[15]	TROFIMENKO N,ULLMANN H.Transition metal doped lanthanum gallates[J].Solid State Ionics,1999,118:215-227.
[16]	STEVENSON J W,HASINSKA K,CANFIELD N L,et al.Influence of Cobalt and Iron additions on the electrical and thermal properties of (La,Sr)(Ga,Mg)O3-δ[J].Electrochem Soc,2000,147(9):3213-3218.
[17]	赵捷,王志奇,包俊成,等.碱土与过渡金属复合掺杂镓酸镧基氧离子导体的制备与电性能[J].光电子.激光,2007,18(4):439-442.
[18]	WANG Z L,KANG Z C.Functional and smart materials:structural evolution and structure analysis[M].Newyork:Plenum Press,1998:103.

Cited By

Get Citation

PDF

XML

Article views (4) PDF downloads (1)

Turn off MathJax

Article Contents

Abstract

References

Preparation and Electrical Properties of LaGaO3-based Rare Earth Composite Oxides Doped with Multielement

Abstract

References

Catalog

Export File

Citation

Format

Content

Preparation and Electrical Properties of LaGaO₃-based Rare Earth Composite Oxides Doped with Multielement