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采用甘氨酸 -硝酸盐 ( GNP)法合成出 La0 .6Sr0 .4Co1-y Fey O3 ( y=0～ 1 .0 )体系复合氧化物 ,对合成产物的结构、烧结性能和导电性进行了表征 .研究结果表明 ,不同 n( Co) / n( Fe)比的合成粉料中形成菱形六面体钙钛矿结构 ,合成粉料的颗粒细小均匀 .在室温～ 90 0℃范围内 ,La0 .6Sr0 .4Co O3 ( y=0 )的电导率随温度的升高而单调降低 ,其它 n( Co) / n( Fe)比的样品电导率随着温度升高到 60 0℃附近时达到最大值 .在低温段 ,La0 .6Sr0 .4Co1-y Fey O3 体系的导电行为符合小极化子导电机制 ,导电活化能随 n( Co) / n( Fe)比的降低而增大 .与常规固相合成法相比 ,甘氨酸 -硝酸盐法制备的 La0 .6Sr0 .4Co1-y Fey O3 具有更高的烧结活性和电导率 .
The complex oxides of La0.6Sr0.4Co1-yFeyO3 (y = 0-1.0) were synthesized by the method of glycine-nitrate (GNP), and their structures, sintering properties and electrical conductivity were characterized. The results show that the rhombohedral hexagonal perovskite structure is formed in the synthetic powders with different n (Co) / n (Fe) ratios, and the particles of the synthesized powders are fine and uniform. The microstructure of La0.6Sr0.4CoO3 (y = 0) decreases monotonously with the increase of temperature, while the conductivity of other samples with n (Co) / n (Fe) ratio reaches the maximum as the temperature rises to around 60 0 ° C. In the low temperature range , The conductivity of La0.6Sr0.4Co1-y Fey O3 system accords with the small polaron conduction mechanism and the activation energy increases with the decrease of n (Co) / n (Fe) ratio.Compared with the conventional solid-phase synthesis method, La0.6Sr0.4Co1-yFeyO3 prepared by the glycine-nitrate method has higher sintering activity and conductivity.