分别以钴、铝的氯化物、硝酸盐和硫酸盐为起始原料,NaOH为沉淀剂,用水热法合成了纳米尖晶石型钴蓝色料.分别研究了填充度、pH值、nCo/nAl、起始原料种类以及浓度等对合成色料物相组成、颗粒大小与形貌和呈色的影响.用XRD、TEM和色度分析对样品进行了表征.结果表明:以浓度分别为0.15 mol/L和0.3 mol/L的CoCl2·6H20和AlCl3为起始原料,在填充度为70％、pH值为13、nCo/nAl为1/2的条件下,245℃水热培育20h制得呈色良好的尖晶石型钴蓝色料,颗粒为八面体型,晶型完整,粒径多为100 nm以下.相同条件下,以钴、铝的硫酸盐为起始原料,产物中除COAl204外,还有Co-Al LDHs、γ-AlO(OH)和β-Al(OH)3；以钴、铝的硝酸盐为起始原料,样品呈绿色,颗粒为八面体型Co-Al204,粒径多为100 nm以上.
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