The preparation technics are optimized.The power reunite can be decreased from adding glycol into the solution, and the Sol-Gel is a efficiency method to prepare the power of cobaltite.

• 优化了制备工艺，乙二醇的加入可以缓解粉末团聚现象的发生，溶胶-凝胶方法是制备钴酸盐粉体材料的有效方法。