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ID number:996567
 
Author:
Evaluation:
Published: 11.07.2008.
Language: Latvian
Level: Elementary school
Literature: n/a
References: Not used
Extract

Mehāniskais spriegums izraisa kristālrežģu deformāciju, un tādēļ uz kristālu virsmas rodas polarizācijas lādiņi, kas rada elektrisko lauku. Šo parādību sauc par pjezoelektrisko efektu.
Pjezoelektriķi var būt kvarcs, krams, cukurs, turmalīns, cinka oksīds (ZnO), alumīnija nitrāts (AlN) un citas vielas, ja tās mehāniski noslogo.
Pjezoelektriskais efekts novērojams visos segnetoelektriķos (vielas, kuru relatīvā dielektriskā caurlaidība var sasniegt pat 10 000 un kuras paliek polarizētas pat tad, ja ārējā elektriskā lauka vairs nav).…

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