The effect of ball milling process on the microstructure, morphology and microwave complex permeability of Nd2Fe14B/ α-Fe nanocomposites have been investigated. 研究了机械球磨工艺对材料的微结构、形貌和微波复磁导率的影响。
A network analyzer system is used to make frequency-swept S-parameter measurements on the loaded stripline fixture from which complex permittivity and complex permeability may be calculated. 以带线系统为测试夹具,利用网络分析仪在微波频率下测量材料的复介电常数和复磁导率。
Uncertainty Analysis of Complex Permeability Measurement Using Impedance Analyzer 应用阻抗分析仪测量磁芯复数磁导率的不确定度分析
Study on the complex permeability of ni/ polythene composite material Ni/聚乙烯复合材料复磁导率研究
Temprature Character of Complex Permeability and Permittivity of Microwave Ferrite Absorbent 微波铁氧体吸收剂复磁导率和复介电常数的温度特性研究
The research result shows that a planar wave going through a magnetic boundary does not produce the depolarization effect when the relative complex permittivity of the magnetic medium equals its relative complex permeability. 结果表明,当磁性媒质的相对复介电常数和相对复磁导率相等时,通过空气与磁性媒质边界的平面波不存在退极化效应。
The complex dielectric constant and complex permeability dispersion were investigated in 1MHz~ 6GHz ranges. 并对其复介电常数、复磁导率在1MHz~6GHz下的变化规律进行了研究。
The XRD and TEM method was performed to analyze the component and the particle pattern of the manganese dioxide respectively; the complex permittivity and complex permeability was measured by the coaxial method in 2~ 18GHz, and the EM characteristic of the manganese dioxide was investigated. 通过XRD、TEM手段分析了活性二氧化锰的成分和颗粒形貌,用同轴法测量了其复介电常数和复磁导率,并在2~18GHz内对其电磁性能进行了分析。
Simultaneous Measurement of Complex Permittivity and Complex Permeability Using Stripline Method 带线法同时测量复介电常数和复磁导率
The complex dielectric constant and complex permeability dispersion were investigated in the range of 100 MHz-6 GHz. 测定了玻璃陶瓷在100MHz~6GHz下的复介电常数和磁导率。
Study of Measuring Complex Permeability of Soft Magnetic Film by Jug shaped Magnetic Core Method 罐形磁芯法测量软磁薄膜复数磁导率的研究
A new method is presented to determine the complex permittivity and complex permeability of electromagnetic medium at microwave frequencies. 提出了一种测试介质材料微波复介电常数和复磁导率的新方法;
The development of an electromagnetic parameters ( including relative complex permittivity and complex permeability) test system was studied in this paper. 本文研究材料电磁参数(相对复介电常数和相对复磁导率)测试系统的开发。
Effect of purification on 2~ 18GHz complex permittivity and complex permeability of carbon nanotubes 纯化处理对碳纳米管2~18GHz复介电常数与复磁导率的影响
Theoretical Calculations of Microwave Complex Permeability and Complex Permittivity of Polycrystalline iron Fiber Absorbers 多晶铁纤维吸收剂微波复磁导率和复介电常数的理论计算
Based on the literature researches, considered the complex permeability characteristics of low permeability gas reservoirs, a three-dimension gas-water two-phase percolation mathematical model is established, which reflects the concrete influence factors, such as low velocity non-Darcy flow, starting pressure gradient and slippage effect. 本文基于国内外文献调研成果,针对低渗透气藏的复杂渗流特征,建立了低渗透气藏低速非达西流动三维、气-水两相渗流数学模型,该模型考虑启动压力梯度和滑脱效应的影响。
This paper described a novel method for high-frequency complex permeability measurement. 该文提出了一种新的高频复磁导率的测试方法。
Measurement of Complex Permeability Spectrum and Its Application in the Study of Domain Structure 复磁导率频谱的测定及其在磁畴中的应用
With the increasing of BST, the density, the relative complex permittivity and the electronic loss increased, and the relative complex permeability decreased. 而M型六角铁氧体随着BST含量的增加,密度增大,饱和磁化强度、相对复磁导率和磁损耗减小,介电常数和电损耗有所提高。
Magnetic parameters were measured by vibrating sample magnetometer. The electrical resistivity was measured by a direct current four-probe method, and the complex permeability was measured by microwave resonance cavity. 采用振动样品磁强计、四探针法、微波矢量分析仪及谐振腔法测量薄膜试样的磁电性能和微波复磁导率。
The different content of carbon and the various aspect ratios of fibres can adjust their complex permeability and resonance frequency. 通过对羰基铁纤维中碳含量及长径比的调节,可控制纤维的磁导率和共振频率。
XRD, SEM are employed to study the construction and composition of the substitution, the complex permittivity and complex permeability of the samples between 2~ 18 GHz are tested through coaxial method by a network vector analyzer. 通过XRD、SEM等手段研究了取代物的结构和组成:采用了网络矢量分析仪,通过同轴法测试了各取代物在2~18GHz频率范围内的复介电常数和复磁导率;
The real part of complex permeability and natural resonance frequency improves simultaneously, however overmilling is unfavorable to further enhance the magnetic loss. 球磨粉末的复磁导率实部和自然共振频率均相应提高,但过度球磨不利于材料磁损耗性能的提高。
The Measurement of Complex Permeability of the Ferrite Absorber 铁氧体吸收材料复导磁率的测量
Both complex permittivity and complex permeability of the samples decrease with the increase of Ni content. 样品的介电常数和磁导率随着Fe含量增加而降低。
During the heat treatment, Fe combined with active N and O to produce magnetic compounds, which would improve the complex permeability of carbon matrix. 在热处理过程中,Fe结合PAN大分子链上的活性N、O元素生成磁性化合物,提高碳基体的磁导率。
The resonance peak of the imaginary part of complex permeability for Co sub-micron particle-paraffin wax composite appears at 4.4 GHz which attributes to both the natural resonance and eddy current effect. 亚微米线状Co/石蜡复合体系的磁导率虚部在4.4GHz左右出现一个宽化的共振峰,该共振峰为复合材料内自然共振和涡流效应共同作用的结果。
In addition, it can be used as microwave absorbing material because of it can keep high real and imaginary parts of complex permeability in C-band and Ku-band of microwave. 此外,由于其在微波频段C波段和Ku波段可以保持高的复磁导率实部和虚部,可以用作微波吸收材料。
The complex permittivity values and complex permeability values of the nickel ferrite/ polystyrene composite show an increasing trend with the increase of nickel ferrite content. 随着镍铁氧体含量的增加,镍铁氧体/聚苯乙烯复合材料的复数介电常数和复数磁导率增大。
However, the complex permeability was also influenced by the phase, relative content and morphology of the magnetic substances. 然而,磁导率的大小不仅与磁性物质含量有关系,也与物相形态和各成分相对含量有关。