介电常数

基本解释 (translations)

permittivity  ·  permittivities

词组短语

dielectric constant · relative permittivity · specific inductive capacity · specific inductive capacitance · dielectric coefficient

与介电常数相关的网络例句 [注：此内容来源于网络，仅供参考]

This essay reviewed the development of high dielectric constant oxide films in the world on the basis of .

本论文从提高铝氧化膜介电常数的角度出发，综合国内外高介电常数复合氧化膜的发展状况，提出了三种生长高介电常数复合氧化膜的制备技术。

The general theory of the electromagnetic resonance and electrical properties of the dielectric materials are simply discussed in chapter 2 in order to cite them in the latter chapters. The two kinds of test techniques of the complex permittivity of the dielectric materials with the low or high permittivity are discussed in chapter 3 and chapter 4 respectively, where the author's creationary work is emphasized particularly.

本论文针对国内多家用户对电介质材料复介电常数测试的需要，以谐振法为基础，讨论了电介质材料微波复介电常数的两种测试方法，建立了相应的两套测试系统，分别覆盖了介电常数ε〓=2~10和ε〓=10~125的测试范围，完成了高、低介电常数电介质材料微波复介电常数的准确测试。

The invention relates to an organic thin-film transistor of three-layer composite film insulated gate which comprises a substrate (1), a metal electrode (2), a organic semiconductor layer (6), a source/leakage electrode; and also comprises: a low dielectric constant polymer layer (3), a high dielectric constant oxide layer (4), a low dielectric constant polymer layer (5), three-layer composite film insulated gate is composed of the (3) layer, the (4)layer and the (5) layer.

本发明涉及三层复合膜绝缘栅的有机薄膜晶体管，包括衬底(1)，金属电极(2)，有机半导体(6)层，源/漏电极(7)；还包括：低介电常数聚合物层(3)，高介电常数氧化物层(4)，低介电常数聚合物层(5)，所述的(3)、(4)和(5)层构成三层复合膜绝缘栅。

In general we have two kinds of dielectric constant: the absolute dielectric permittivity, V the relative dielectric permittivity r, Vr = 0 = 1 , 0 means the vacuum dielectric constant, dielectric electrode means of EV \\ V \\ rate.

一般我们有两种介电常数：电介质的绝对介电常数，电介质的相对V介电常数r，Vr＝0＝1＋，0指真空中的介电常数，指电介质的电极化EV\V\率。

Good thermal stability and self-extinguishing behavior was observed with the cured polybenzoxazine resins. Second, furan-containing benzoxazine monomers, P-FBz, BPA-FBz, and 4FP-FBz were prepared using furfurylamine as a raw material. Formation of furfurylamine Mannich bridge networks in the polymerizations of P-FBz and BPA-FBz increased the cross-linking densities and thermal stability of the resulting polybenzoxazines. P-FBz and BPA-FBz- based polymers also exhibited high glass transition temperatures above 300℃, high char yields, and low flammability with a limited oxygen index value of 31. The dielectric (Dk3.21–3.39) and mechanical properties (high storage modulus of 3.0–3.9 GPa and low coefficient of thermal expansion of 37.7– 45.4 ppm) of the P-FBz and BPA-FBz-based polymers were superior or comparable to other polybenzoxazines. 4FP-FBz used for polybenzo- xazine modification by means of formation of benzoxazine hybridation with P-FBz.

第二部份以2-呋喃甲胺为起始物，制备了P-FBz、4FP-FBz与BPA-FBz 三个含呋喃官能基之氧代氮代苯并环己烷的单体；BPA-FBz与P-FBz於开环聚合中形成之Mannich bridge网状结构有效地提升聚氧代氮代苯并环己烷聚合物之交联密度与热安定性；Poly与Poly具有大於300℃之玻璃转移温度、高的焦炭生成率与具有31之极限氧指数(Limited oxygen index， LOI)的难燃性特质，Poly与Poly之介电常数(Dk=3.21~3.39)与机械性质[3.0~3.9 GPa的储存模数与37.7~45.4ppm之低热膨胀系数( Low coefficient of thermal expansion， Low CTE)]均较其他聚氧代氮代苯并环己烷为优；4FP-FBz具有低之介电常数(Dk=2.7)，以其作为降低介电常数之反应型改质剂，与P-FBz混成，证实可有效地降低Poly的介电常数。

As the brittleness of low-k material,the traditional wire bonding parameter often lead to die pad crack or Au-AL matter bad;after used low-k material,die size,die pad opening and die pad pitch change to more little,wire change to lengther and density change to more higher,it\' s new challenge for molding and wire bonding;at the same time, low-k material also require to control the thermal stress in package.

由于低介电常数材料的脆性，传统的引线压焊参数设置将会导致焊盘碎裂以及金铝化合物不良；由于使用低介电常数材料后，芯片尺寸、压焊区域和压焊间距进一步减小，金线压焊长度和密度大大增加，这就为压焊和模塑提出了新的要求；同样由于低介电常数材料的应用，对封装体内部的热应力的控制也提出了更高的要求。

Recently, much attention has been paid to an unusual material CaCu_3Ti_4O_(12) because of its giant dielectric constant , The current study focus on the origin of the giant dielectric, however, its little high dielectric loss limits application, how to reduc.

近年来具有巨介电常数材料的CaCu_3Ti_4O_(12)引起了人们很大的关注，目前研究主要集中在CCTO巨介电常数的来源问题，但其较大的介电损耗限制了应用，对如何降低其介电损耗的研究很少。

The results show that glass ceramics with thermal expansion coefficient of 5.11×10^(-6)℃, major phase of α-cordierite and ε=5.5, tan σ=2.1×10^(-4) can be prepared by the addition of 3.6% alkalis (Li2O+Na2O), and Li2O occupies 1.8%. With Li2O substitution for Na2O, spontaneous crystallization is obviously enhanced, and temperature of the first crystallization peak decreases from 950℃ to nearly 900℃, but the crystallization temperature of the second peak was not varied. With the increase of Li2O content, mixed alkali effect can be observed from the thermal expansion coefficient and dielectric loss curve which decreases first and then increases. Dielectric constant decreases monotonously with the increase of Li2O content.

研究结果表明：Li2O和Na2O总含量为3.6%，其中Li2O含量为1.8%时，微晶玻璃以α-堇青石为主晶相，热膨胀系数为5.11×10^(-6)℃，微波频率下介电常数ε为5.5，介电损耗tanσ为2.1×10^(-4)；随着Li对Na的取代，玻璃的析晶能力增强，初始析晶峰温度从950℃降至900℃左右，但没有降低第二析晶峰温度；随着Li2O含量增加，热膨胀系数及介电损耗都出现明显的混合碱效应，曲线呈现先降低后升高的变化趋势；样品的介电常数随Li2O含量增加单调降低。

The results show that glass ceramics with thermal expansion coefficient of 5.11×106 ℃, major phase of α-cordierite and εr=5.5, tan σ=2.1×104 can be prepared by the addition of 3.6% alkalis(Li2O+Na2O), and Li2O occupies 1.8%. With Li2O substitution for Na2O, spontaneous crystallization is obviously enhanced, and temperature of the first crystallization peak decreases from 950 ℃ to nearly 900 ℃, but the crystallization temperature of the second peak was not varied. With the increase of Li2O content, mixed alkali effect can be observed from the thermal expansion coefficient and dielectric loss curve which decreases first and then increases. Dielectric constant decreases monotonously with the increase of Li2O content.

研究结果表明：Li2O和Na2O总含量为3.6%，其中Li2O含量为1.8%时，微晶玻璃以α-堇青石为主晶相，热膨胀系数为5.11×106 ℃，微波频率下介电常数ε r为5.5，介电损耗tan σ为2.1×104；随着Li+对Na+的取代，玻璃的析晶能力增强，初始析晶峰温度从950 ℃降至900 ℃左右，但没有降低第二析晶峰温度；随着Li2O含量增加，热膨胀系数及介电损耗都出现明显的混合碱效应，曲线呈现先降低后升高的变化趋势；样品的介电常数随Li2O含量增加单调降低。

The changes of complex permittivity of pure-water,natrium oxalate,potassium permanganate and sodium chloride aqueous solution with different power were measured.It is shown that the changes of real part of the complex permittivity are all small and the imaginary part of the complex permittivity of electrolyte solution are obvious.

通过实验分别测量了纯水、草酸钠、高锰酸钾和氯化钠水溶液的复介电常数随微波测量功率改变的情况，发现4种待测物质的复介电常数实部都随微波功率改变较小，而草酸钠、高锰酸钾和氯化钠水溶液的复介电常数虚部随微波功率改变明显。

与介电常数相关的网络解释 [注：此内容来源于网络，仅供参考]

dielectric constant detector：介电常数检测器

dielectric conductance 电介质电导 | dielectric constant detector 介电常数检测器 | dielectric constant 介电常数

relative dielectric constant：相对介电常数

其SI单位为法/米,常用微法/米、纳法/米、皮法/米;(3)相对介电常数(relative dielectric constant)εr,定义为ε/ε0,其中ε0为真空介电常数,它是无量纲量. 在化工中一般使用相对介电常数来表征电介质或绝缘材料电性能. 一般化工文献中,往往使用"介电常数"代替"相对介电常数".

dielectric constant meter：介电常数测定计

dielectric constant 介电常数 | dielectric constant meter 介电常数测定计 | dielectric current 电介质电流

absolute dielectric constant：绝对介电常数

介电常数分为:(1)绝对介电常数(absolute dielectric constant)ε0,定义为1/μ0c2,其中μ0为真空磁导率,c为光在真空中的速度;(2)介电常数,定义为电通量密度D除以电场强度E.

electric inductivity：电感应性,介电常数

电通量 electric flux | 电感应性,介电常数 electric inductivity | 电测,电性测录 electric log

permittivity of free space：自由空间介电常数

介电常数;电容率 permittivity | 自由空间介电常数 permittivity of free space | 真空介电常数;真空电容率 permittivity of vacuum

permittivity dispersion：介电常数分散

permittivity 介电常数 | permittivity dispersion 介电常数分散 | persistence 余辉

dielectric constant;relative permittivity：介电常数

镜面反射 mirro reflection | 介电常数 dielectric constant;relative permittivity | 介电损耗 dielectric loss

elastivity：倒介电常数 介电常数倒数

elastinase 弹力纤维瘤 弹性蛋白酶 弹性硬蛋白酶 | elastivity 倒介电常数 介电常数倒数 | elastivitycoefficient 倒电容系数

electric elastivity：介电常数的倒数

"electric efficiency ","电效率" | "electric elastivity ","介电常数的倒数" | "electric -electric ","纯电的"