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dielectric constant     
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  介电常数
     Study on the Design, Preparation and Properties of Polyimide-based Composites with High Dielectric Constant
     聚酰亚胺基高介电常数复合材料的设计、制备与性能研究
短句来源
     A Method for Measuring Dielectric Constant Using a Microstrip Antenna
     用微带天线测量介电常数
短句来源
     The Static Dielectric Constant of Salted Solutions
     含盐体系的静态介电常数
短句来源
     The Application of Microwave Gunn Marginal oscillator for the Measuremet of Dielectric Constant
     微波耿氏边际振荡器在测量介质介电常数等的应用
短句来源
     MEASUREMENT OF WOOD DIELECTRIC CONSTANT AND LOSS AT MICROWAVE FREQUENCIES
     微波频率下木材介电常数和损耗的测量
短句来源
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  介电常数的
     The temperature coefficient of the dielectric constant α_T is less than 2.0×10~(-3) K~(-1),and the voltage coefficient of the dielectric constant α_V is less than 5.0×10~(-3)V~(-1).
     值高达7.2×10~4,介电耗损角正切 tgδ<2.5×10~(-2),介电常数的温度系数α_r<2.0×10~(-3)K~(-1),电压系数α_v<5.0×10~(-3)V~(-1)。
短句来源
     The temperature coefficient of dielectric constant at 10kHz was about-24×10~(-6)/℃ and-48×10~(-6)/℃ respectively. The material has good dielectric properties,which can be used as dielectric material.
     在10kHz下,介电常数的温度系数分别为-24×10-6/℃和-48×10-6/℃,是一种性能良好的介质材料。
短句来源
     Measurements of the temperature dependence of the dielectric constant of single crystals K_xNa_(1-x)Sr_(1. 22) Ba_(0. 78) Nb_5O_(15) (0≤x≤1) and its variation with DC bias electric field near the Curie point indicate that the nature of the ferroparaelectric phase transitions in these crystals varies with composition.
     测量 K_xNa_(1-x)Sr_(1.22)Ba_(0.78)Nb_5O_(15)(0≤x≤1) 单晶介电常数的温度依赖性以及居里点附近介电常数随直流偏置电场的变化表明,该系列晶体的铁电一顺电相变特性依赖于其成分。
短句来源
     The complex dielectric constant measurements indicate that the imaginary part and the real part increase greatly with the Cr content in the frequency of 8.2~12.4GHz.
     复介电常数测试结果表明,在8.2~12.4GHz频率范围内,复合材料复介电常数的实部和虚部随Cr粒子含量的增加大幅度上升,且存在明显的频散效应。
短句来源
     Effect of hydrostatic pressure on the dielectric constant of the KTaO_3 ceramics was investigated in the pressure range of 0 to 2000 MPa below temperature 100 K.
     在温度100K以下,0—2000MPa压力范围内,研究了静压力对KTaO_3陶瓷介电常数的影响。
短句来源
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  介电常量
     CaCu3Ti4O12 ceramics exhibits a dielectric constant at 10 kHz about 7200 and dielectric loss tangent about 0.06.
     CaCu3Ti4O12陶瓷在10kHz处的介电常量高达7200,介电损耗约为0.06。
短句来源
     An experiment on relative dielectric constant
     相对介电常量实验研究
短句来源
     The Effects of Dielectric Constant Fluctuation on the Spatial Distribution of Light Waves in Random Materials
     随机介质介电常量的涨落与光波的空间分布
短句来源
     Measurement of electrostatic force and vacuum dielectric constant using an electronic balance
     用电子分析天平测量静电力及真空介电常量
短句来源
     Thermal annealing for these films indicates that the thermal stability of a C∶F∶H films is dependent on CC bond concentration as well as correlation of CC bond with other bond configuration in the films. Additionally, the source gases have a great influence on the F/C atomic ratio and the relative dielectric constant of a C∶F∶H films.
     薄膜的真空退火结果表明 ,a C∶F∶H薄膜的热稳定性除了取决于薄膜的CC键浓度外 ,还与CC键和其他键结构的关联有关 ,此外 ,源气体对薄膜的F C比和相对介电常量也有重要的影响
短句来源
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  “dielectric constant”译为未确定词的双语例句
     Low Dielectric Constant Glass Ceramics Derived from ZnO-Li_2O-B_2O_3-SiO_2 System
     低温合成ZnO-Li_2O-B_2O_3-SiO_2系陶瓷材料
短句来源
     Low Dielectric Constant B_2O_3-P_2O_5-SiO_2 Ceramics Derived from Mixed-Solid Process
     固相法制备低温烧结B_2O_3-P_2O_5-SiO_2系低介陶瓷材料
短句来源
     Sintering Process in the Low Dielectric Constant Ceramic System ZnO-B_2O_3-SiO_2
     ZnO-B_2O_3-SiO_2系统低介陶瓷的烧结工艺研究
短句来源
     At the same time, dielectric constant is increased from 5.3 for CAS glass to 750.5 for 10 %CAS/90 %SBN50 glass ceramics at 10 kHz.
     同时,CAS/SBN50玻璃陶瓷的εr随SBN50含量的增大而增大,10kHz时,从CAS玻璃的5.3显著提高到10%CAS/90%SBN50玻璃陶瓷的750.5。
短句来源
     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
短句来源
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  dielectric constant
Because of the existence of nanopores, the dielectric constant of PI films decreased by a wide margin and was less than 2.0 at a PU mass fraction of 20%.
      
It implies that this is an effective means to reduce the dielectric constant of PI, but it also causes the decrease of tensile strength and the rise of water absorption.
      
Lead zirconium titanate (PZT) films (Zr/Ti=45:55) with a high dielectric constant are prepared successfully on the low-resistance Si substrate in sol-gel dip-coating process with PT film used as the buffer layer.
      
The relative dielectric constant εr and the dissipation factor tgδ of the PZT thin films were measured with an LCR meter and were found to be 158 and 0.04-0.005, respectively.
      
The dependence of the effective dielectric constant on the temperature and the average spontaneous polarization on the film thickness are computed, which qualitatively agree with the experiments.
      
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The dielectrie constants of toluene, carbon bisulphide, normal pentane, normal hexane, ethyl ether and iso-amyl alcohol were measured by a capacity bridge using a specially constructed liquid condenser at both 30° and 75℃ (22.4℃ only for the last liquid), for frequencies of 600,1000 and 2000 cycles per sec. and under pressures from 1 up to 12,000 kg/cm2. For the first four liquids, the dielectric constant is practically independent of the frequencies

作者用一电容桥及一特制之液体蓄电器以量甲苯,二硫化碳,正戊烷,正己烷,乙醚,及异戊醇之比电容。所用温度为摄氏三十及七十五度(异戊醇之温度仅为二十二度四),频率为每秒六百,一千及二千周,压力自一气压高至一万二千气压。前四液之比电容几与所用频率无关。(ε-1)/(ε+2)·1/d,(ε-1)/d及(ε~(1/2))-1/d三式中以第一式最近一常数,然压力渐增第一式之值恒随之而渐减,至一万二千气压时(在甲苯为九千五百气压),其减少约数在甲苯及二硫化碳为百分之三,在乙醚为百分之八,在异戊醇为百分之十九,显随电矩之增加而增加,至其原因篇中亦略加说明。 篇中图表惠蒙同事朱福炘先生代为抄绘,附誌谢忱。

Conductivity measurements of the hydrochloride of aniline, methyl aniline and ethyl aniline in water aud in dioxane-water mixtures have been made at 25℃, by using a Jones Bridge. Measurements of conductances at 25℃ of these salts have been made in concentrations ranging from 0.1 normal to 0.001 normal, using water and numerous dioxane-water mixtures as solvents. The conductivities of these salts in water and some dioxane-water mixtures with excess free bases have also been measured. The hydrolysis constants...

Conductivity measurements of the hydrochloride of aniline, methyl aniline and ethyl aniline in water aud in dioxane-water mixtures have been made at 25℃, by using a Jones Bridge. Measurements of conductances at 25℃ of these salts have been made in concentrations ranging from 0.1 normal to 0.001 normal, using water and numerous dioxane-water mixtures as solvents. The conductivities of these salts in water and some dioxane-water mixtures with excess free bases have also been measured. The hydrolysis constants of these salts and the ionizatioa constants of these amines have been calculated from the conductivity measurements. The results are: K_h K_b Aniline hydrochloride 2.7 × 10~(-5) 4. 5 × 10~(-10) Methyl aniline hydrochloride 2.6 × 10~(-5) 4. 6 × 10~(-10) Ethyl aniline hydrochloride 1.1 × 10~(-5) 10. 6 × 10~(-10) A discussion of the effect of dielectric constant upon conductivities has been included. Calculations of the equivalent conductivities of these salts have been made and discussed. The equivalent conducfivities at infinite dilution at 25℃ are: Aniline hydrochloride 166 mho Methyl aniline hydrochloride 161 mho Ethyl aniline hydrochloride 152.5 mho

1. 作者在25℃時,用Jones電導橋测量氫氯化苯胺、N甲基苯胺及N乙基苯胺在水與水及二氧六圜的混合液裏的電導。這些氫氯化物的濃度為0.1,0.02,0.01, 及0.001 N。至於混合液中二氧六圜的成份,則爲每100毫升溶液內含有10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90等毫升。 2.含有過量苯胺類的這些氫氯化苯胺類的水溶液、以及水與二氧六圜的混合液中,也作了電導測定。 3.這些氫氯化物的水解分數、水解常數和這些苯胺的電離常數也作了計算和比較。 4.關於電導和介電常數的關係,在本文中曾爲簡單的討論。 5.這些氫氯化物的無限稀釋時的當量電導,在本文中也作了計算,並與文献中能查到的數據作了比較。

The velocities of reaction of ethyl acetate with sodium hydroxide in dioxane- water mixture have been determined in seven different temperatures(5°,10°, 15°,20°,25°,30°and 35°).For each temperature,the compositions of solvent mixture are 0,5,10,15,20,25 and 30% of dioxane.We thus obtain 49 velo- city constants as summarized in the following table. At low temperatures,the velocity constant decreases slightly with decrease of dielectric constant of solvent.At higher temperatures,such decreases of k' become...

The velocities of reaction of ethyl acetate with sodium hydroxide in dioxane- water mixture have been determined in seven different temperatures(5°,10°, 15°,20°,25°,30°and 35°).For each temperature,the compositions of solvent mixture are 0,5,10,15,20,25 and 30% of dioxane.We thus obtain 49 velo- city constants as summarized in the following table. At low temperatures,the velocity constant decreases slightly with decrease of dielectric constant of solvent.At higher temperatures,such decreases of k' become more pronounced. The“isocomposition”energy of activation decreases slightly with increase of percentage of dioxane in the solvent mixture. The“isodielectric”energy of activation shows practically no change,when the dielectric constant changes from 80 to 50.Its value is 11300 calories. The experimental data are compared with the three modern theories of ion- molecule reaction,namely,by(1)Moelwyn-Hughes,(2)Laidler and Eyring and (3)Amis and Jaffe.From the viewpoint of influence of dielectric constant on the rate of the present reaction,the first two theories disagree qualitatively with our experimental data,while the last one,though qualitatively successful,fails quantitatively.(The “enhanced moment” and index of refraction as calculated from the last theory with the use of our data are unreasonably large.)

作者在7具不同温度(5°,10°,15°,20°,25°,30°,35°)下,研究了乙酸乙酯和氢氧化钠在二氧六圜和水的混合溶剂中的反应速度。每个温度有7个不同的二氧六圜和水的成分(0%,5%,10%,15%,20%,25%,30%的二氧六圜),因此得到49个速度常数。在每个温度里,反应速度常数随溶剂介电常数的减小而略为下降:温度愈高,下降趋势愈为显著。同溶剂成分的活化能随着溶剂里二氧六圜成分的增加而略为下降。同介电常数的活化能,在80至50的介电常数范围中,却和介电常数的变化无关。它的平均值是11300卡。我们用实验结果检验最近三个溶液里离子和分子反应速度理论:(1)Moelwyn-Hughes 的、(2)Laidler-Eyring 的和(3)Amis-Jaffe 的理论。就介电常数对反应速度的影响来说,理论(1)和(2)在质上就不和实验相符。理论(3)在质上似和实验相符,但在量上却相差太远。因此就乙酸乙酯对氢氧化钠的反应来说,三个理论都是不合的。

 
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