Electromechanical coupling coefficient

Electromechanical coupling coefficient

Electromechanical coupling coefficient is a numerical measure of the conversion efficiency between electrical and acoustic energy in piezoelectric materials.

Qualitatively the electromechancial coupling coefficent, k, can be determined as:

: mathcal{K}^{-2} = frac{1}{mbox{ energy converted per input energy

References

* [http://www.medcyclopaedia.com/library/topics/volume_i/e/ELECTROMECHANICAL_COUPLING_COEFFICIENT.aspx Medcyclopaedia Definition]
* [http://www.crystal-is.com/pdfs/APL844611.pdf#search=%22Electromechanical%20coupling%20coefficient%22 Applied Physics Letters]
* [http://www.ktu.lt/ultra/journal/pdf_33_3/33-1999-Vol.3_03-D.Ciplys.pdf#search=%22Electromechanical%20coupling%20coefficient%22 Vilnius University, Laboratory of Physical Acoustics]


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Mechanical filter — Figure 1. A mechanical filter made by the Kokusai Electric Company intended for selecting the narrow 2 kHz bandwidth signals in SSB radio receivers. It operates at 455 kHz, a common IF for these receivers, and is dimensioned 45×15×15 mm ( …   Wikipedia

  • Электромеханический фильтр — ЭМФ советского производства, предназначенный для выделения нижней боковой полосы в аппаратуре радиосвязи с промежуточной частотой 500 кГц. Ширина полосы пропускания  3,1 кГц. Механическ …   Википедия

  • коэффициент электромеханической связи — Основной параметр, показывающий, какая часть общей энергии W пьезоэлектрика преобразуется в механическую Wм или электрическую Wе Определяется по формуле . Значение b зависит от материала и моды колебаний пьезопреобразователя. Для колеблющегося по …   Справочник технического переводчика

  • Gallium phosphate — (GaPO4 or gallium orthophosphate) is a colorless trigonal crystal with a hardness of 5.5 on the Mohs scale. GaPO4 is isotypic with quartz, possessing very similar properties, but the silicon atoms are alternately substituted with gallium and… …   Wikipedia

  • Quartz crystal microbalance — A quartz crystal microbalance (QCM) measures a mass per unit area by measuring the change in frequency of a quartz crystal resonator. The resonance is disturbed by the addition or removal of a small mass due to oxide growth/decay or film… …   Wikipedia

  • niobium processing — Introduction       preparation of the ore for use in various products.       Niobium (Nb) has a body centred cubic (bcc) crystal structure and a melting point of 2,468° C (4,474° F). Of the refractory metals, it has the lowest density and best… …   Universalium

  • Hall effect — For the Colombian band, see The Hall Effect (band). The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular …   Wikipedia

  • Electronic filter — Electronic filters are electronic circuits which perform signal processing functions, specifically intended to remove unwanted signal components and/or enhance wanted ones. Electronic filters can be:*passive or active *analog or digital *discrete …   Wikipedia

  • Magnetic moment — Electromagnetism Electricity · …   Wikipedia

  • Magnet — This article is about objects and devices that produce magnetic fields. For a description of magnetic materials, see magnetism. For other uses, see Magnet (disambiguation) …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”