饱和磁化

• The tem shows lots of nano silica particles circumfuse on the surface of the micro fe particles after the micro fe coated by silica . the sem analysis shows the same result . the vsm shows the micro fe particles have almost no remnant magnetism and coesive . the saturation magnetization decrease with the feed content of teos remenant magnetization and coesive are little
  随着teos的投料的增加，材料饱和磁化强度呈下降趋势，微米粒子磁化曲线通过原点，表面包裹后，剩磁与矫顽力变化很小对于微米铁粉，其磁畴变化较快，没有剩磁与矫顽力。
• The results showed that the microstructure of as - deposited tbdyfe ii 1ms were amorphous and the crystal of tbfe2 were found in films after annealing at 500 . annealing films in vaccum could improve the saturation magnetization ms and the susceptibility , decrease the coercivity and the saturaion field , and make the direction of the magnetic moments parallel to the film plane
  结果表明，制备态薄膜为非晶态结构，经过500真空退火热处理后，薄膜出现了tbfe _ 2的结晶物，薄膜的矫顽力和外场的饱和磁场大大降低，饱和磁化强度增强，初始磁化率提高，易磁化轴转向膜面。
• The formation process of w - type ferrite underwent from oxide of metal , the m - type transition phase to final w - phase . when the heating rate was 5 / min , at 900 for 3 hrs and 1200 for 4 hrs , pure m - type and w - type ferrites were formed in air respectively . with heat treatment temperature increasing , crystal structure was more intact , the saturation magnetization increased and the coercive force decreased
  热处理过程表明， m型铁氧体直接由金属氧化物反应形成，未经历尖晶石中间相； w型铁氧体形成由金属氧化物到m相过渡相最终向w相的转变；当升温速率为5 min ，温度在900 ，保温3小时和1200保温4小时，就分别形成单相m相和w相铁氧体；随着热处理温度的升高和保温时间的延长，衍射峰变尖锐，结晶更完整，空心微球的饱和磁化强度增大，矫顽力减小。
• 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。
• Based on the analysis about the test requirements and the saturated magnetization of the armor plate , the excitation magnetic circuit satisfying the testing condition and a validation system are designed . because the geometric , of the magnetic leakage at the direction of the normal of the roundness fault has the feature of two peaks : a positive and a negative , using the linear regression and the software matlab , two regression equation are proposed : one is about the peak value of the magnetic leakage and the diameter and depth of the roundness fault ; the other is the distance between the two peaks and the diameter of the roundness fault . the result of the validation system proves that the two equations are valid , and an applied method using for quantificationally inspecting the roundness faults is proposed according to the two equations
  根据实验要求，通过对钢板达到饱和磁化的必要性进行的分析，设计了符合试验条件的励磁磁路，并设计了一套实验验证系统；根据圆形缺陷法线分量漏磁场几何图形正负双峰值的特点，采用线性回归拟合的原理和matlab软件及其统计工具箱中的相关函数，给出了圆形缺陷漏磁场几何图形的峰峰值与圆形缺陷的直径和深度以及峰峰值间距与圆形缺陷直径的两个回归拟合方程，并通过实验验证系统验证了拟合方程的正确性，利用这两个简单实用的拟合方程，提出了一种工程定量检测圆形缺陷的应用方案。
• The better magnetostriction of tbdyfe thin films was 120x 10 - 6 in 100ka / m and 240 x 10 - 6 in 330ka / m the research on the magnetostriction of smco / tbdyfe bilayer films indicated that smco thin films could improve the magnetostricion of tbdyfe thin films effectively through improving its saturation magnetization ms and susceptibility
  退火热处理和衬底粗糙度的降低有助于薄膜磁致伸缩性能的提高。对smco tbdyfe复合薄膜磁致伸缩特性的研究表明， smco薄膜的复合能提高磁致伸缩薄膜的磁化率和饱和磁化强度从而提高tbdyfe薄膜磁致伸缩性能。
• In this paper we put fonvard the method of introducing the light and middling lanthanon into the tb - fe - co magneto - optical materials by taking advantage of the higher saturation magnetization intensity , higher anisotropy and higher magneto - optical effect of light and middling rare - earth . moreover the law and mechanism of how the addition affect the magneto - optical property of the films were discussed
  本文是在比较、总结现有关于tbfeco磁光薄膜的理论和背景研究的基础上，利用轻、中稀土元素的高饱和磁化强度、高磁晶各向异性、高磁光效应的优点，提出在传统的tbfeco磁光材料中掺入轻、中稀土元素的方法。
• 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。
• The results showed that appropriate copolymer composition and processing techniques were fairly important in the preparation of composite magnetic microspheres . superparamagnetic magnetic composite microspheres with size less than 500nm , magnetic content 22 % and saturation magnetization 32 . 5emu / g could be prepared by this novel method . it is proposed that the polymer
  综合看来，采用dpe法制备的磁性复合微球磁含量高、饱和磁化强度高、无机微粒分布均匀，且表面洁净，包覆效率高，因而具有更好的综合性能，是一种具有广阔应用前景的新方法。