dielectric


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dielectric

(dī'ĭlĕk`trĭk), material that does not conduct electricity readily, i.e., an insulator (see insulationinsulation
, use of materials or devices to inhibit or prevent the conduction of heat or of electricity. Common heat insulators are, fur, feathers, fiberglass, cellulose fibers, stone, wood, and wool; all are poor conductors of heat.
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). A good dielectric should also have other properties: It must resist breakdown under high voltages; it should not itself draw appreciable power from the circuit; it must have reasonable physical stability; and none of its characteristics should vary much over a fairly wide temperature range. One important application of dielectrics is as the material separating the plates of a capacitorcapacitor
or condenser,
device for the storage of electric charge. Simple capacitors consist of two plates made of an electrically conducting material (e.g., a metal) and separated by a nonconducting material or dielectric (e.g.
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. A capacitor with plates of a given area will vary in its ability to store electric charge depending on the material separating the plates. On the basis of this variation each insulating material can be assigned a dielectric constant. Generally, the dielectric constant of air is defined as 1 and other dielectric constants are determined with reference to it. Other properties of interest in a dielectric are dielectric strength, a measure of the maximum voltage it can sustain without significant conduction, and the degree to which it is free from power losses.

dielectric

[‚dī·ə′lek·trik]
(materials)

dielectric

1. a substance or medium that can sustain a static electric field within it
2. a substance or body of very low electrical conductivity; insulator

dielectric

An insulator (glass, rubber, plastic, etc.). Dielectric materials can be made to hold an electrostatic charge, but current cannot flow through them.
References in periodicals archive ?
The first two of the nine orders include Dielectric TFU-WB UHF broadband pylon arrays for KTIV-14 in Sioux City, Iowa; and WXOW-28 in La Crosse, Wisc.
1 mm were prepared at 120[degrees]C for the measurement of dielectric properties.
As a proof of concept a RDRA with high dielectric constant, [[epsilon].
Reducing dielectric constant alone does not change the crosstalk, but reducing the dielectric constant and reducing the trace-to-plane spacing will reduce crosstalk.
The dielectric properties of wood have been studied on a large scale at lower frequencies (James 1975, James 1977, Kabir et al.
There are also still a few critical issues to be addressed, including the design and formulation of the soybean resin, to make sure it has the correct dielectric loss properties at the frequencies used by computers.
The dissipation loss in the dielectric can affect the overall system noise temperature and, therefore, degrade the system gain vs.
The interconnect portion of an integrated circuit sits above the transistor level as stacks of metal wires buried in layers of dielectric material, usually silicon dioxide.
IBM said the low-k dielectric helps the company solve signal interference problems.
Impedance monitoring (also referred to as dielectric cure monitoring) is an emerging technology in the rubber industry.