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dielectric    
n. 电介体,绝缘体
a. 非传导性的

电介体,绝缘体非传导性的

dielectric
介电质; 绝缘材料 DIELEX

dielectric
电介质

dielectric
n 1: a material such as glass or porcelain with negligible
electrical or thermal conductivity [synonym: {insulator},
{dielectric}, {nonconductor}] [ant: {conductor}]

Dielectric \Di`e*lec"tric\, n. [Pref. dia- electric.] (Elec.)
Any substance or medium that transmits the electric force by
a process different from conduction, as in the phenomena of
induction; a nonconductor, separating a body electrified by
induction, from the electrifying body.
[1913 Webster]


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  • electrostatics - Why is capacitance increased with a dielectric rather . . .
    A dielectric with high permittivity $\varepsilon$ permits (requires) more polarization for a given field magnitude than a low permittivity one More polarization means more charge stored, so the high $\varepsilon$ material must hold more charge for a given field to be measured across it when used as a dielectric in a capacitor
  • Why is the dielectric strength decreasing with thickness
    I wonder why the dielectric strength is higher the thinner the material is: quot;Dielectric films tend to exhibit greater dielectric strength than thicker samples of the same material quot; Sou
  • condensed matter - What is the mechanism of dielectric saturation . . .
    The dielectric is a very polar, protic solvent, presumably water (few other solvents dissolve ions, polar aprotic almost never, exept ion pairs, but this is a different story) The dielectric constant (DC) of protic solvents is "produced" by orientation polarisation, this is reason for the DCs being very high compared to nonpolar substances
  • electromagnetism - Why the dielectric permitivity matrix of lossless . . .
    They say for lossless media $\overleftrightarrow {\varepsilon}$, dielectric permitivity matrix is symmetric and all elements are real So this matrix is a Hermitian matrix
  • Why the Dielectric strength decrease with the frequency?
    2 According to Wikipedia, the dielectric strength decrease with the frequency: Is it possible to explain what is happening when the frequency increase ? I try to understand how to generate an arc electric without applying a high voltage in the air (I cannot change the temperature or the humidity or use a gaz)
  • Displacement current in a dielectric - Physics Stack Exchange
    Further, this would imply that the equation for net displacement current in a dielectric medium would be $\epsilon_ok \frac {d\phi_E} {dt}$ However, this result doesn't make intuitive sense to me Could someone please explain if there's a problem with my thinking here?
  • Dielectric constant of water - Physics Stack Exchange
    A relative dielectric constant at $100$ Hz of about $4000$ So, I cannot interpolate back in frequency (I put a link to the paper at the end) Does anyone have any info about where I could find this data? I know that for constant current and about $20$ C the constant is $80 1$ What about at $50$ Hz?
  • electricity - Why do we use dielectric materials in a capacitor . . .
    Dielectric materials tend to be more insulating than air, and thus by using such a material the plates (in a parallel plate capacitor) can be placed closer together which would yield higher capacitance Capacitors with air in between them do exist
  • dielectric - Dependence of capacitance on its build material - Physics . . .
    Since each of these oxides has a different dielectric constant and dielectric strength (withstand voltage), a capacitor made from one material would have different characteristics to a capacitor of similar geometry made from another material





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