Piezoelectric effect
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Transcript of Piezoelectric effect
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Piezoelectric EffectBy B SRI JYOTHSNA15011D2003 JNTU, HYDERABAD
Soft Skills Lab - Presentation
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Piezoelectricity ???
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Ability to generate an electric charge in response to applied mechanical stress.
‘Piezo’ derived from Greek word ‘piezein’ meaning “push”
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Reversible i.e,
converse of Piezoelectric effect
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Mechanical force Electricity
Piezoelectric effect
Electricity Mechanical strain
Converse of Piezoelectric effect
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Piezoelectric Materials
Crystals which acquire a charge
when compressed, twisted or distorted
and vice versa
Quartz
Silk
Enamel
Barium Titanate(BaTiO3)
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Principle behind this effect ??
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When a mechanical force like a vibration is applied on the material it polarizes.
when the force is released flow of ions takes place and electric current flows through the crystal.
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Applications
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Converse of Piezoelectric effect is used in Quartz watches
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To detect wear in train wheels by detecting the change in vibration behavior of the entire
wheel by generating mode shapes
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Gyms, dance floors etc can be laid with crystals below the floor or tiles.This energy can be used to power the equipment in the place.
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Piezoelectric Microphone- sound sensor- sound waves bend the
crystal- creates a changing
voltage.
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Used in ultrasonic transducers - medical ultrasound
imaging- Non Destructive Tests in
constructions
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Piezoelectricity is a source of “Green
energy”
Flexible Piezo materials withstand large deformations
Conclusion
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Thank You!