溶液燃烧法合成Co_3O_4纳米粉体及热处理研究  

Study on Synthesis of Nanocrystalline Co_3O_4 Powders by Solution Combustion Technique and the Subsequent Heat Treatment Process

作　　者：魏玉鹏[1,2] 王海燕[1,2] 兰伟[3] 卢学峰[1,2] 喇培清[1,2] 马吉强[1,2] 

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050 [3]兰州大学物理科学与技术学院,兰州730000

出　　处：《材料导报》2017年第6期29-33,共5页Materials Reports

基　　金：国家自然科学基金青年基金(51402142);甘肃省自然科学基金(148RJZA001);省部共建有色金属先进加工与再利用国家重点实验室(兰州理工大学)开放基金(SKL1304;SKLAB02014003)

摘　　要：分别以氨基乙酸、柠檬酸、葡萄糖为燃料,Co(NO_3)_2·6H_2O为氧化剂,采用溶液燃烧法合成Co_3O_4粉体,并对氨基乙酸为燃料合成的Co_3O_4粉体在500℃、600℃和700℃热处理,研究其结构、微观形貌和磁学性能。研究表明各燃料配制的前驱体溶液在300℃均可发生燃烧反应合成Co_3O_4粉体,以氨基乙酸为燃料时,合成粉体的颗粒较大,中间有气孔,分散性好,残留少量的氨基乙酸。n(氨基乙酸)∶n(硝酸钴)=1.11∶1时合成的Co_3O_4粉体600℃热处理后得到了高纯度、分散性好、平均径向尺寸80nm的Co_3O_4纳米粉体。以氨基乙酸为燃料合成的Co_3O_4产物在600℃和700℃热处理后,其矫顽力和剩磁值都比500℃热处理后的要小。Co3O4 powders were synthesized by solution combustion technique using glycine, citric acid, glucose as fuel, respectively, and Co （NOs）2 ＂ 6H20 as oxidizing agent. Microstructure, morphology and magnetic properties of Co3O4 powders which were synthesized through glycine as fuel and annealed at 500℃, 600 ℃ and 700 ℃ were investigated. The results showed that Cos O4 powders can be synthesized by combustion reaction with different precursor solutions at 300 ℃. The Cos O4 powders which were synthesized by using glycine as fuel had large particle zise, cdrtain porosity, good dispersion and a small amount of residual gly- cine. The nanocrystalline Co3 O4 powders with high purity, fine dispersion, 80 nm average radial dimension could be obtained while glycine-to-Co（NO3 ）2 ＂ 6H20 molar ratio was 1.11 ＂ 1 and annealing temperature was 600 ℃. The synthesized Co3O4 powders annealed at 600 ℃ and 700 ℃ exhibited lower coercivity and remanence value than those annealed at 500 ℃.

关 键 词：溶液燃烧法 Co3O4纳米粉体 热处理 磁性能 

分 类 号：TB32[一般工业技术—材料科学与工程] TB34