In this study, cobalt aluminate was prepared by a sol-gel method. XRD and FTIR analyses of the precursors obtained at 300 °C for 12 h revealed that the type of complexing agent used in the synthesis affects the pyrolysis step. An amorphous phase was obtained by using citric acid as the complexing agent. A beginning of crystallization was observed by using complexing agents such as polyacrylic acid and glycine. The structural investigation of the starting reagents revealed that the observed lines exhibit characteristics of Co₃O₄ derived from cobalt nitrate. The crystallinity of the samples increased with the increase in the annealing temperature, with no effect observed by the change in the complexing agent. The appearance of the (331) reflection for the heat-treated powders was characteristic of the blue spinel compound.

本研究采用溶胶-凝胶法制备铝酸钴。在 300 °C 下 12 小时获得的前体的 XRD 和 FTIR 分析表明，合成中使用的络合剂类型会影响热解步骤。通过使用柠檬酸作为络合剂获得无定形相。通过使用络合剂如聚丙烯酸和甘氨酸观察到结晶的开始。起始试剂的结构研究表明，观察到的谱线表现出 Co ₃ O _{4 的特征}来源于硝酸钴。样品的结晶度随着退火温度的增加而增加，而络合剂的变化没有观察到影响。热处理粉末的 (331) 反射外观是蓝色尖晶石化合物的特征。