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Effects of MoO_3 Amounts on Sintering and Electrical Properties of Ce_(0.8)Nd_(0.2)O_(1.9)

Effects of MoO_3 Amounts on Sintering and Electrical Properties of Ce_(0.8)Nd_(0.2)O_(1.9)
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摘要 The high purity (Ce0.8Nd0.2O1.9)1-x(MoO3)x(x=0, 0.005, 0.010, 0.020; Ce0.8Nd0.2O1.9=NDC) solid solutions were prepared by modified sol-gel method. The structures and electric conductivities were characterized by X-ray diffraction(XRD), field-emission scanning electron microscopy(FESEM) and electrochemical impedance spectros copy(EIS). The XRD results show that the materials were pure phase with a cubic fluorite structure. Compared to the undoped-NDC samples, MoO3 doped-NDC showed higher sintered density(over 96%) at reduced sintering tempera ture. The electric conductivity(σt) of (Ce0.8Nd0.2O1.9)1-x(MoO3)x at 400 °C was 9.58×10-4 S/cm when x=0.010, which was higher than that of undoped-NDC samples(σt=3.29×10-4 S/cm). The obtained optimal amount of the MoO3 was x=0.010 in this system. The high purity (Ce0.8Nd0.2O1.9)1-x(MoO3)x(x=0, 0.005, 0.010, 0.020; Ce0.8Nd0.2O1.9=NDC) solid solutions were prepared by modified sol-gel method. The structures and electric conductivities were characterized by X-ray diffraction(XRD), field-emission scanning electron microscopy(FESEM) and electrochemical impedance spectros copy(EIS). The XRD results show that the materials were pure phase with a cubic fluorite structure. Compared to the undoped-NDC samples, MoO3 doped-NDC showed higher sintered density(over 96%) at reduced sintering tempera ture. The electric conductivity(σt) of (Ce0.8Nd0.2O1.9)1-x(MoO3)x at 400 °C was 9.58×10-4 S/cm when x=0.010, which was higher than that of undoped-NDC samples(σt=3.29×10-4 S/cm). The obtained optimal amount of the MoO3 was x=0.010 in this system.
出处 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2012年第1期9-13,共5页 高等学校化学研究(英文版)
基金 Supported by the National Natural Science Foundation of China(No.20871023) the Jilin Provincial Science Research Foundation, China(Nos.20070510, 20101549)
关键词 Neodymium-doped ceria Molybdenum oxide Sol-gel method Grain boundary conductivity Neodymium-doped ceria Molybdenum oxide Sol-gel method Grain boundary conductivity
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