Electrical and CO-sensing properties of NdFe1–xCoxO3 perovskite system
来源期刊：Journal of Rare Earths2010年第4期
论文作者：张茹 胡季帆 韩周祥 赵玛 吴占雷 张雍家 秦宏伟
文章页码：591 - 595
摘 要：NdFe1–xCoxO3 （x=0.0–0.5） powders were prepared by a sol-gel citric method. X-ray diffraction was used to confirm the phase composition of the powders. All the samples are orthorhombic structure. The unit cell volume and grain size decreased with an increase of Co content x. The conduction type of the NdFe1–xCoxO3 perovskite oxides changed with the increasing Co content x. When x<0.3, the oxides showed p-type conduction behavior, and then changed to n-type when x>0.3. All the sensors presented higher responses and lower optimal operating temperatures. The highest response to 0.03% CO gas reached 1215% at 170 oC for NdFeO3 sensor; however, Co2+ doping in NdFeO3 did not improve the gas responses.
张茹1，胡季帆1，韩周祥1，赵玛1，吴占雷1，张雍家2，秦宏伟2
1. Henan Provincial Key Laboratory of Surface & Interface Science, Zhengzhou University of Light Industry2. School of Physics, Shandong University
摘 要：NdFe1–xCoxO3 （x=0.0–0.5） powders were prepared by a sol-gel citric method. X-ray diffraction was used to confirm the phase composition of the powders. All the samples are orthorhombic structure. The unit cell volume and grain size decreased with an increase of Co content x. The conduction type of the NdFe1–xCoxO3 perovskite oxides changed with the increasing Co content x. When x<0.3, the oxides showed p-type conduction behavior, and then changed to n-type when x>0.3. All the sensors presented higher responses and lower optimal operating temperatures. The highest response to 0.03% CO gas reached 1215% at 170 oC for NdFeO3 sensor; however, Co2+ doping in NdFeO3 did not improve the gas responses.
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