EFECTUL PIEZOELECTRIC PDF

Pyroelectricity from the two Greek words pyr meaning fire, and electricity is a property of certain crystals which are naturally electrically polarized and as a result contain large electric fields. This polarization change gives rise to a voltage across the crystal. If the temperature stays constant at its new value, the pyroelectric voltage gradually disappears due to leakage current. The leakage can be due to electrons moving through the crystal, ions moving through the air, or current leaking through a voltmeter attached across the crystal. Pyroelectricity can be visualized as one side of a triangle, [5] where each corner represents energy states in the crystal: kinetic , electrical and thermal energies.

Author:Nesida Gukora
Country:Angola
Language:English (Spanish)
Genre:Business
Published (Last):21 July 2008
Pages:292
PDF File Size:9.24 Mb
ePub File Size:1.87 Mb
ISBN:467-6-83177-567-9
Downloads:12674
Price:Free* [*Free Regsitration Required]
Uploader:Meztigis



From Wikimedia Commons, the free media repository. File information. Structured data. Captions English Add a one-line explanation of what this file represents.

Summary [ edit ] Description Efect piezoelectric. I, the copyright holder of this work, hereby publish it under the following licenses:. You may select the license of your choice.

You cannot overwrite this file. The following other wikis use this file: Usage on ro. Structured data Items portrayed in this file depicts. Category : Ultrasound. Namespaces File Discussion. Views View Edit History. This page was last edited on 20 June , at Files are available under licenses specified on their description page. All structured data from the file and property namespaces is available under the Creative Commons CC0 License ; all unstructured text is available under the Creative Commons Attribution-ShareAlike License ; additional terms may apply.

By using this site, you agree to the Terms of Use and the Privacy Policy. Description Efect piezoelectric. Dogaru Florin. You are free: to share — to copy, distribute and transmit the work to remix — to adapt the work Under the following conditions: attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made.

You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Dogaru Florin talk contribs.

M3N78 PRO MANUAL PDF

Pyroelectricity

From Wikimedia Commons, the free media repository. File information. Structured data. Captions English Add a one-line explanation of what this file represents. Summary [ edit ] Description Efect piezoelectric.

AERMEC DIAGRAMMA PSICROMETRICO PDF

File:Efect piezoelectric.png

The Pockels effect after Friedrich Carl Alwin Pockels who studied the effect in , or Pockels electro-optic effect, changes or produces birefringence in an optical medium induced by an electric field. In the Pockels effect, also known as the linear electro-optic effect, the birefringence is proportional to the electric field. In the Kerr effect , the refractive index change birefringence is proportional to the square of the field. The Pockels effect occurs only in crystals that lack inversion symmetry , such as lithium niobate , and in other noncentrosymmetric media such as electric-field poled polymers or glasses. Pockels cells are voltage-controlled wave plates. The Pockels effect is the basis of the operation of Pockels cells. Pockels cells may be used to rotate the polarization of a beam that passes through.

Related Articles