摘要
采用沉淀法,以金属硝酸盐和混合碱为原料,制备了一系列纳米Mg(OH)_2和Al(OH)_3,并经过程序升温焙烧制备了纳米Mg O、Al_2O_3及其混合物Mg O·Al_2O_3,采用X-射线衍射仪对其结构进行了表征。以二甲基硅油为基体制备了导热硅脂,并用导热系数测定仪对其性能进行了测试。结果表明,Mg(OH)_2、Al(OH)_3及Mg O和Al_2O_3具有良好的晶体结构,将其作为填料制备导热硅脂可以改善其导热性能。添加66.7%(Vol.)的Mg O、Al_2O_3及Mg O·Al_2O_3得到的导热硅脂,其导热系数分别为:1.12、0.72和0.93 W/(m.K),导热性能顺序为:Mg O>Al_2O_3>Mg O.Al_2O_3。
Mg（OH）2 and AI（OH）3 nano-materials were prepared by precipitation method using metal nitrate and mixed base as raw materials. MgO, Al2O3 and its mixture MgO.Al2O3 nano-metal oxides were obtained by calcination of Mg（OH）2 and AI（OH）3. Their structure was characterized by XRD. Silicone grease was prepared by using dimethyl silicone oil as basic material, and its performance were tested by thermal conductivity analyzer. The results show that Mg（OH）2 and AI（OH）3 as well as MgO and Al2O3 have good structure and the thermal conductivity of the silicone grease is improved by adding nano-metal oxides. The silicone grease prepared by adding 66.7 %（Vol.） MgO, Al2O3 and MgO＇Al2O3 have thermal conductivity as 1.12, 0.72 and 0.93, respectively. The order of thermal conductivity is： MgO 〉 Al2O3 〉 MgO.Al2O3.
出处
《广东化工》
CAS
2015年第23期35-36,共2页
Guangdong Chemical Industry
基金
广东省教育厅大学生创新训练计划项目(2014)
关键词
金属氧化物
导热硅脂
导热性能
metal oxide
silicone grease
thermal conductivity
