摘要
用硬脂酸凝胶法制备了Ｃｏ２－Ｘ型六角晶系钡铁氧体纳米晶．在７５０℃热处理得到的纳米晶形貌为球形，粒径范围为１５～２５ｎｍ．随着热处理温度的升高，粒子逐渐长大并呈块状．振荡样品磁强计测试结果表明，Ｃｏ２－Ｘ型六角晶系钡铁氧体纳米晶具有与常规体材料不同的磁性能，其比饱和磁化强度σｓ低于后者．产物的矫顽力。
Nanostructured samples of X type Ba 2Co 2Fe 28 O 46 hexagonal ferrite have been prepared by using the stearic acid gel method. The nanocrystalline hexaferrite powders obtained at 750 ℃ were spherical in shape with grain sizes in the range of 15￣25 nm. With increasing calcining temperature, the particles become a plate like structure. The magnetic properties of X type barium ferrite nanocrystals were measured by using Vibrating Sample Magnetometer(VSM). The results indicate that the magnetic properties of the title products are different from those of the common X type hexaferrites with a lower specific saturation magnetization( σ s). Coercivity force( H c) and the specific saturation magnetization( σ s) of the products are influenced by the particles sizes.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第9期1467-1470,共4页
Chemical Journal of Chinese Universities
基金
国家教育委员会博士学科点基金
关键词
纳米晶体
X型
钡铁氧体
磁性质
制备
Nanocrystal, X type barium ferrite, Magnetic property
