initial permeability

High initial permeability Mn-Zn ferrite was prepared by composite doping method .

用复合掺杂的方法制备了高性能的高磁导率MnZn铁氧体材料。

Study on Initial Permeability of Fe-Based Nanocrystalline Soft Magnetic Alloy

铁基纳米晶软磁合金起始磁导率的研究

Weak magnetic field the induced current of the steel specimens is proportional to initial permeability .

并证实了在断开磁路下的交流弱磁场中，感应电流与钢铁试样的μ0成正比。

New Fe-Based Amorphous Alloys with High Initial Permeability , Low Coercivity and Low Core Loss

铁耗少的恒导磁率铁镍钴合金新型的高起始磁导率低矫顽力低铁损铁基非晶态合金

And sintering temperature has an important effect on the initial permeability of Mn-Zn ferrites .

烧结温度对锰锌铁氧体的起始磁导率有重要影响。

Grain boundary layer of high resistance formed by Ca 2 + and Si 4 + could promote initial permeability frequency characteristics .

同时由于Ca2+与Si4+共同形成高电阻的晶界层，能够改善材料的起始磁导率的频率特性。

When excessive MoO - 3 added , porosity and core losses increased , the initial permeability decreased .

但掺杂过量时，晶粒中气孔率增加，起始磁导率下降，损耗也大为增加。

The result indicated that better microstructure , higher initial permeability , lower loss and higher density can be obtained for higher quenching speed .

发现随着冷却速度的加快，可获得更好微观结构、更高起始磁导率、更低损耗、更高烧结密度之低温共烧材料。

We can concluded that a small quantity of P_2O_5 addition could increased the diameter of crystalline grains , improved uniformity and initial permeability .

少量P2O5掺杂可使铁氧体晶粒尺寸增大，均匀性改善，起始磁导率提高。

A new method of defining stress sensitivity coefficient was presented . The relationship between stress sensitivity coefficient and initial permeability was deduced by physical modeling experiment in room .

提出了一种定义应力敏感系数的新方法，通过室内物理模拟实验，分析得到了应力敏感系数与初始渗透率的关系式。

The sensitivity of the groundwater fluctuation to rainfall process is influenced by initial permeability of the sand clay layer , rainfall style and rainfall amount .

地下水动态对降雨过程的敏感程度受控于土层的初始渗透性、降雨方式和降雨量；能够对地下水动态产生明显影响的降雨过程一般应同时满足以下三个条件；

At the same time , the effect of isothermal annealed treatment on the relative initial permeability is much greater than the effect of various contents of Cr element .

同时，等温退火处理对各样品相对起始磁导率的影响比改变Cr元素含量x要大得多。

The more fractures in the coal seams , the larger the initial permeability of the fracture , and the faster of the gas transportation in them .

煤层中裂隙越多，裂隙的初始渗透率越大，受到注气影响时变化越大。

The relative curves of the ratio of transient permeability to initial permeability with the injected fluid volumes or seepage velocity are like a character " S " .

渗透率比值与注水孔隙体积倍数或渗流速度的关系曲线均呈“S”形；

High requirement demand materials have high initial permeability . Also want them have good temperature characteristic , frequency characteristic , lower magnetic loss , high impedance , superposition capability and so on .

大量的需求要求材料不仅要具有高初始磁导率，同时必须具有良好的温度特性、频率特性、低的损耗、高的阻抗和良好的叠加性能等。

The new alloy possesses higher d. c. relative initial permeability of 7.8 × 10 ~ 4 and Lower coercivity of 0.8Am ~ ( - 1 ) .

新合金的直流起始磁导率和矫顽力水平分别为7.8×10~4和0.8Am~（-1）。

The research of the high initial permeability ( 6000 ~ 20000 ) ferrite and the frequency dependence of inductance of the ferrite transformer made by high permeability ferrite core are presented .

研究了高起始磁导率（6000～20000）铁氧体和由该磁芯制成的变压器的电感频率依赖关系。

After annealing in a rotating field , the initial permeability of films is not less than 3000 , at the field up to 10 MHz , and they show a good frequency response !

经旋转磁场退火热处理后，膜的起始磁导率一直到10MHz都可在3000以上，表现出良好的频率特性。

The analysis has been conducted to the impact of different initial permeability on gas drainage , and the result is that the larger the initial , permeability , the more easily gas drainage is .

分析了不同的初始渗透率对抽放瓦斯的影响，初始渗透率越大，瓦斯越易抽放。

Simulation tests indicate that the hydraulic and mechanical responses of the slope to a rainfall process is influenced by the initial permeability of the sand layer , the rainfall style and the rainfall amount .

模拟实验表明，边坡对降雨过程的水力学及力学响应取决于土层的初始渗透性、降雨方式和降雨量；

By analyzing the magnetic properties of ferromagnetic materials we can know : The composition of the ferromagnetic materials determine the initial permeability , alloy percentage of ferromagnetic material differ from the initial permeability .

经过对铁磁性材料的磁化特性分析可得到：铁磁材料的初始磁导率与材料的组织成分有关，铁磁性材料所含合金百分比不同则初始磁导率不同。

The magnetic properties of Mn-Zn ferrite such as initial permeability , saturation magnetization , Curie temperature , resistivity and power loss are affected greatly by Fe2 + content in the raw materials .

研究了原材料中Fe2+含量对Mn-Zn铁氧体材料的电阻率ρ、功耗PL、居里温度TC、起始磁导率μi等性能的影响。

Both α - Fe ( Si ) phase and the residual amorphous phase may affect the initial permeability of nanocrystalline Fe_ ( 73.5 ) Cu_1Mo_3Si_ ( 13.5 ) B_9 alloy .

α－Fe（Si）相和残余非晶相结构对合金的起始磁导率均有影响。

The secondary coil reflect to the primary magnetic field through the ferromagnetic material differ because of different initial permeability of the material . According to the phenomena , we can identify the ferromagnetic material grade and sort it .

根据铁磁性材料磁导率的不同，初级磁化线圈通过铁磁性材料耦合到次级线圈的信号就不同的现象，就可以进行钢级识别和材质分选。

By comparison with the results obtained for high initial permeability state , the annealing in a transverse field leading to low B r state substantially reduces the excess loss , thus resulting in the obvious decrease in the total loss .

与对高起始磁导率态所得的结果比较表明，导致低Br态的横向场退火使过剩损耗明显降低，从而明显地降低了总损耗。

The Fe_ 76.9 Cu_ 0.6 Nb_ 2.5 Si_ 13 B_7 nanocrystalline alloy has excellent soft magnetic properties . It has high magnetic flux density and initial permeability , low coercive force and core losses .

Fe769Cu06Nb2.5Si13B7纳米晶软磁合金具有优良的软磁性能：高饱和磁感应强度、高初始磁导率、低矫顽力、低损耗。

There are more and more people who have paid attention to the microwave magnetic materials . In such microwave applications , the operating frequencies have reached the gigahertz region , and both high initial permeability and high resonance frequency are required .

在微波应用领域中，对微波磁性材料的磁导率和共振频率上的要求越来越高，人们希望在获得高的共振频率的同时获得高的磁导率。

However , permeability has also recovered to a certain degree with the waterflooding to be prolonged , and the degree of recovery is related to the extent of initial permeability : the degree of recovery is greater with higher initial permeability ;

但随注水时间的延长，渗透率有不同程度的恢复，且恢复程度与渗透率大小有关：初始渗透率高，恢复程度大；

It is found that the best technology is speed 50 m / s , power 35 kW , protected by 0.05 MPa Ar atmosphere . With the increase in frequency , the real part of initial permeability decreases while the virtual part decreases before increasing .

结果表明：制备的最佳工艺为铜轮转速50m/s，感应线圈功率为35kW，在真空氩气（0.05MPa）保护下，起始磁导率的实部随频率的增大而减小，虚部先减小后增大。

Mn-Zn Ferrite whose initial permeability comes up to 10,000 can be manufactured if the powders are prepared by chemical coprecipitation process , sintered by using air , cooled in vacuum , Its magnetic properties are up to advanced standard in China , now .

叙述用化学共沉法制备粉料，用空气烧结，真空冷却工艺制备出μi达1万的Mn－Zn铁氧体，其磁性能处于目前国内领先水平。