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31 августа 2011 | Автор: energy555 | Рубрика: Научная литература » Физика | Комментариев: 0
Dielectric Phenomena in Solids


Название: Dielectric Phenomena in Solids
Автор: Kwan Chi Kao
Издательство: Elsevier
Год издания: 2004
Страниц: 600
ISBN: 0-12-396561-6
Язык: english
Формат: pdf
Качество: отличное
Размер: 4.9 Мб

The word dielectric is derived from the prefix dia, originally from Greek, which means “through” or “across”; thus, the dielectric is referred to as a material that permits the passage of the electric field or electric flux, but not particles. This implies that the dielectric does not permit the passage of any kind of particles, including electrons. Thus, it should not conduct the electric current. However, a dielectric is generally considered a nonconducting or an insulating material.
There is no ideal dielectric in this planet. The perfect vacuum may be considered to be close to the ideal dielectric, but a perfect vacuum cannot be obtained on Earth. A vacuum of 10-14 torr still consists of about 300 particles per cubic centimeter.
All real dielectric materials are imperfect, and thus permit, to a certain degree, the passage of particles. We have to coexist with the imperfections.

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