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采用甘氨酸-硝酸盐法(GNP)合成了L1-xCaxCrO3(x=0～0.3)体系复合氧化物粉料,对合成产物的粉体结构和性能进行了表征,研究了体系组成及合成方法对材料烧结性能和导电性能的影响。实验结果表明,在La1-CaxCrO3体系中Ca2+离子的引入促进了材料的烧结,随着Ca2+离子含量的增加,材料的烧结致密度和导电性能明显提高。与常规固相法相比,GNP法合成的粉料颗粒细小均匀(100-200 nm),烧结活性高,其烧结体在1400℃以下即可达到较高的烧结致密度和良好的电性能。
The composite oxide powder of L1-xCaxCrO3 (x = 0 ~ 0.3) was synthesized by glycine-nitrate method (GNP), the structure and properties of the synthesized product were characterized, and the effects of the composition of the system and the synthesis method on the material Sintering and Electrical Conductivity. The experimental results show that Ca2 + ions are introduced into La1-CaxCrO3 system to promote the sintering of the material. With the increase of Ca2 + content, the sintering density and electrical conductivity of the material increase obviously. Compared with the conventional solid phase method, the GNP powder particles are fine and uniform (100-200 nm) with high sintering activity, and the sintered compact can achieve higher sintering densities and good electrical properties under 1400 ℃.