| 1. | In this paper , the principles of enhancement and the various of preparation methods were reviewed
本文对超顺磁性造影剂的增强原理和制备方法进行了总结及评论。 |
| 2. | Magnetic fluid is a relatively new functional material . it has some common quality which was well equable , superparamagnetism
它还是一种比较新型的功能材料，有着一些共同的性质，比如十分稳定、超顺磁性等。 |
| 3. | They are all lower than iron - series alloy , their coercive force is zero , they exhibited superparamagnetization at room temperature and good soft magnetic materials
本文合成的非晶态铁系合金均为软磁材料，都呈现超顺磁性，可以用于吸波材料、磁性液体等。 |
| 4. | Superparamagenetic contrast agents is a new type of magnetic material used in the magnetic resonance imaging ( mri ) , which has the advantages of imaging in liver and spleen , has been became a popular subject of study in china and other countries
摘要超顺磁性造影剂是一种新型的磁共振造影剂，对肝脾等部位的成像效果显著，已成为国内外研究的热点之一。 |
| 5. | The major findings are listed below : ( 1 ) the film of 4 . 1 ml consists of superparamagnetic nano - cluster with large perpendicular anisotropy and in - plane uniaxial anisotropy . the oscillatory curve of is symmetrical which can be described by a function of sin square
Iml时，未形成连续薄膜，而是超顺磁性的团簇，具有很大的单轴的垂直各向异性和平面单轴各向异性，色散关系曲线是对称的正弦类曲线。 |
| 6. | Some special surface treatment methods were adopted to improve the interface interaction between the polymer and magnetic particles in order to increase the encapsulation efficiency . the ultrasonic technique , some organic solvents and several functional steric stabilizers were applied to improve the quality of final magnetic particles . ps / iron oxides magnetic composite microspheres with the size 80 - 210nm were prepared via improved emulsion polymerization
三种方法可以制备具有不同粒径和磁性能的磁性fe _ 3o _ 4纳米粒子，其中，共沉淀法制备的磁性微粒粒径大小稳定，比较容易控制在10nm左右，且所得磁性微粒的磁响应性强，具有超顺磁性，利于制备高性能的磁性复合微球。 |
| 7. | Fe - ni alloy fiber were first prepared in a mixed solution of ferrous and nickelous salts , using kbh4 as a reducing agent . conditions , such as quantity of naoh , concentration of salts , and species of surfactants , of preparation of fe - ni alloy were studied . the result show that fe - ni alloy were soft magnetic materials and they exhibited superparamagnetization at room temperature that have been widely used in industry
本文用液相还原法首次制备出纤维状的fe - ni合金、球形的fe - co 、 co - ni合金、 fe - co - ni合金粉体材料，并对其性能进行了分析和测试，结果表明：这些合金粒径小，比饱和磁化强度较大，矫顽力为零，呈现超顺磁性，是非晶态的软磁材料。 |
| 8. | The particle size of the product is about 16 nm with perfect crystal structure . the product exhibits superparamagnetism and strong magnetic responsivity , the saturation magnetization being 55 . 4emu / g and the magnetic susceptibility being 8 . 28 10 - 3emu / oe . the particle size distribution is homogeneous with good dispersion . 2
产物具有完美的晶体结构，粒径约16nm ，比饱和磁化强度为55 . 4emu g ，磁化率为8 . 28 10 ~ ( - 3 ) emu oe ，磁响应性强，具有超顺磁性，剩磁和矫顽力均为零，粒径分布均匀，分散性良好。 |
