Piezoelectricity_F11

Piezoelectricity_F11 - piezoelectric crystal is aimed at...

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1 Piezoelectricity GLY 4200 – Lecture 3 –Fall, 2011
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2 Pierre and Jacques Curie Pierre and Jacques Curie discovered piezoelectricity in 1881
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3 Piezoelectric Effect Diagram
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4 Illustration of Piezoelectric Effect Generation of current by compression
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5 Lighting a Neon Bulb Demonstration of piezoelectricity
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6 Ion Generation Cellophane is wrapped around nylon strings and pulled down The strings repel each other A gun, containing a
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Unformatted text preview: piezoelectric crystal, is aimed at the string • Pulling the trigger causes the gun to emit positive ions • Negative ions are emitted when the trigger is released • When the trigger is released, the strings relax 7 Polarization • P i = d ijk σ jk • where P i is the polarization vector, d ijk is the piezoelectric modulus, and σ jk is the stress tensor...
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Piezoelectricity_F11 - piezoelectric crystal is aimed at...

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