1)D-value of dielectric constant介电常数差
2)permittivity[英][,p?:mi'tiv?ti][美][,p?m?'t?v?t?]介电常数
1.Study on Permittivity and Permeability of Carbon Nanotubes in the Low-frequency Band from 0.5 to 6 GHz;碳纳米管在0.5~6GHz低频波段的介电常数和磁导率研究
2.Measurement of microwave permittivity of high-loss materials using coaxial transmission and reflection way;同轴传输反射法测量高损耗材料微波介电常数
3.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
英文短句/例句
1.complex dielectric permittivity复电容率, 复介电常数
2.The Model of Dielectric Constant for Rain and Estimation of Its Parameters;雨介质的介电常数模型及其参数估计
3.(Mg_(1-x)Zn_x)Al_2O_4 Low Dielectric Constant Microwave Dielectric Ceramics;（Mg_（1-x）Zn_x）Al_2O_4低介电常数微波介质陶瓷
4.Investigation on Permittivity Measurement Methods of Microwave Dielectric Materials;微波介质材料介电常数测试方法研究
5.Preparation and Property of High-k HfO_2 Gate Dielectric Materials高介电常数HfO_2栅介质的制备及性能
6.THE RECENT PROGRESS OF LOW DIELECTRIC CONSTANT MICROWAVE DIELECTRIC CERAMICS低介电常数微波介质陶瓷的研究进展
7.Test method for complex permittivity of solid dielectric materials at microwave frequenciesGB/T5597-1999固体电介质微波复介电常数的测试方法
8.DEVELOPMENT AND APPLICATION OF LOW DIELECTRIC CONSTANT MICROWAVE DIELECTRIC CERAMICS低介电常数微波介电陶瓷的开发与应用
9.Structure and Dielectric Characterization of Er_2O_3 Dielectric FilmEr_2O_3高介电常数薄膜的结构和介电性能的研究
10.Study on dielectric properties of PVDF/PZT/Terfenol-D composite高介电常数PVDF/PZT/Terfenol-D复合材料的介电性能研究
11.Techniques for Measuring the Electromagnetic Parameters of Ferroelectric Materials with High Permittivity;铁电体材料高介电常数测试技术研究
12.A Middle Permittivity Microwave Dielectric Materials Based on BaO-TiO_2-Nb_2O_5 System for Low Temperature Co-fired Ceramics中介电常数BaO-TiO_2-Nb_2O_5体系低温共烧微波介质陶瓷
13.Using Coaxial Cavity and Coalesce with Perturbation Techniques to Measure Medium's Complex Permittivity同轴谐振腔及微扰法测量介质介电常数
14.Design of Measurement System Software for Complex Permittivity Based on LabWindows/CVI and GPIB基于LabWindows/CVI介质复介电常数的测量系统设计
15.Measurement of complex permittivity of microwave dielectric materials using TM_(0mn) modes基于TM_(0mn)模式微波介质材料复介电常数的测量
16.The high dielectric constant is characteristic of hydrogenbonded liquids.高介电常数具有氢键液体的特征。
17.Techniques for Measuring the Electromagnetic Parameters of Microwave Materials with High Permittivity in Broad Band微波高介电常数材料宽频带测试技术
18.Mechanism Behind the Large Dielectric Constant of the CaCu_3Ti_4O_(12) Ceramics;CaCu_3Ti_4O_（12）陶瓷高介电常数产生机理的研究
相关短句/例句
permittivity[英][,p?:mi'tiv?ti][美][,p?m?'t?v?t?]介电常数
1.Study on Permittivity and Permeability of Carbon Nanotubes in the Low-frequency Band from 0.5 to 6 GHz;碳纳米管在0.5~6GHz低频波段的介电常数和磁导率研究
2.Measurement of microwave permittivity of high-loss materials using coaxial transmission and reflection way;同轴传输反射法测量高损耗材料微波介电常数
3.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
3)dielectric constant介电常数
1.The preparation and characterization of porous low dielectric constant oligomeric-MSSQ films;低介电常数甲基倍半硅氧烷多孔膜的制备及表征
2.An experimental study of dielectric constant of edible oil changed with heated temperature and time;食用油介电常数随加热时间和温度变化的实验
3.Calculation of the dielectric constant of pure liquids and liquid mixtures at different temperatures;不同温度下纯液体和液体混合物介电常数的计算
4)dielectric permittivity介电常数
1.Applications of dielectric permittivity of grouting material to GPR image identification;注浆材料介电常数在雷达图像识别中的应用
2.Study on the depth of investigation changing with resistivity and dielectric permittivity of homogenous half-space in high frequency electromagnetic sounding method.研究了均匀半空间电阻率和介电常数对高频电磁法 (10 0kHz～ 5 0MHz)的勘探深度的影响。
3.In addition, the effect of the dielectric permittivity of the working fluid on a single bubble is analyzed.为探明外加电场作用下,不同工质对强化沸腾换热的影响,本文采用了FC-72、R11、R113和R123四种工质,定量研究了两相系统中汽泡周围电场分布特性,探讨了工质介电常数对汽泡的作用规律。
5)dielectric coefficient介电常数
1.At the same frequency,the dielectric coefficient of limestone is influenced obviously by the degree of decency.采用同轴线终端开路反射法测试系统测量碳酸盐岩(灰岩、白云岩)的介电常数,测试结果表明:碳酸盐岩在25 MHz~100 MHz频段范围内介电常数的频散现象明显;相同频率下,灰岩的风化程度对其介电常数的影响较大,角砾状白云岩的介电常数普遍高于未风化白云岩和灰岩;灰岩介电常数随频率变化的离散性比白云岩更为明显。
2.Firstly,a laboratory coaxial probe method for measuring dielectric coefficient of dielectric materials are proposed.首先,提出一种测量介质介电常数的终端开路同轴探头技术,该技术将同轴探头紧贴有导电衬底的介质,通过测量探头终端的反射系数来确定介质的介电常数;然后,通过这种室内同轴探头法,测试在频率为1 GHz范围内,上海地区盾构隧道所使用的两种不同配比惰性浆液在第1天龄期的介电常数值以及一定配比的双浆液在第3天和第14天龄期的介电常数,进而得到在不同频率下电磁波在浆液中精确的传播速度。
6)dielectric constants介电常数
1.In this paper,the relative dielectric constants,the piezoelectric strain constants and the elastic compliance constants of La_3Al_(0.5O14(简称LAGT)单晶的相对介电常数,压电应变常数和弹性柔顺常数,并和La3Ga5。
2.All of the piezoelectric strain constants,piezoelectric stress constants,elastic compliance constants,elastic stiffness constants and dielectric constants of YCaO(BO 3) 3 single crystal have been determined for the first time.首次测量了 YCa O(BO3) 3晶体的全部压电应变常数、压电应力常数、弹性柔顺常数、弹性刚度常数以及介电常数。
延伸阅读
复介电常数复介电常数complex dielectric constant 倒￡“ED(t)=“(田)及cos田t+￡，，(留)凡sin山t(1)相角子，即式中:/(。卜会cos“(。)，:。(。卜会sin“(。)(2)tg占=损耗电流11_f充电电流Ic一万 (7)即在交变电场下，D(t)和E(t)的关系要用两个物理量口和了来表征。上式中，相位占和了、了都是频率的函数，且与温度和电介质结构密切相关。 D(t)可分解为两个分量:一个与E同相位，另一与E有90。相位差。如将上述关系用复数表示，且令君*=Eoe，“‘，D*=Doej(“一泞)，则刀‘与E*的关系可表示为 D*(t)=‘*(臼)E*(t)(3)在式中引入复数介电常数扩=了一j已，则 二(田卜;斜一会一‘一‘(田卜j一‘。，“， 静态时，。=0、占=0。即￡，，=O，式(3)可表示为D=二，(0)E，其中￡，(O)即为静态介电常数￡s。可见，g(。)是静态介电常数在交变场下的推广，e’(。)称为频率依赖的介电常数。 动态时，在真空电容器中，电流虽然超前电场二/2，但由于占=0，而不产生损耗;故在具有介电常数的电容器中，单位时间、单位体积中损耗的能量评，可由E及与E同相的电流分量。扩E的乘积表示，即]。“E图1电介质中交流电场E 与电流I的矢量图部和虚部表示，而弛豫时间为 根据复介电常数定 义，由式(4)并经简化 处理后可得 ￡*(臼)=￡‘(臼)一j￡“ 6二一己。/。、 t田】=E。十二~一，犷一一~气己少 1一」田T 上式称为德拜公式，用 来表征复介电常数的频 率特性。如将其分成实:时，则得已=昆+65一三.l+田2r2(￡。一氛)田T1十田2丁2 已，，tg口一=万，二 Q(‘s一几)田丁￡s+氛田2丁2 (9)(10)(11)W一晋DOEOS‘n“一晋“‘“一‘E’“‘g“(5，合(￡·l一(去‘一‘。210 10()四T由于了的变化不大，因而能量损耗与复介电常数的虚部已成正比。式(4)中了(动称为介质的损耗因子。式(5)中占称为介质损耗角，tg沙称为介质损耗角正切或介电耗散因子。 在交流电路中，若置介质于平板电容器中，并在两极间外加交流电压V V=Voej“。.，_L一~~，卜。尸。
