PowerPoint Presentation On Soft Transducer Materials For Energy Conversion

PPT On Soft Transducer Materials For Energy Conversion
Download

Soft Transducer Materials For Energy Conversion Presentation Transcript:
1.Soft Transducer Materials For Energy Conversion

2.CONTENTS
Properties
Piezoelectricity
Pyroelectricity
Ferroelectricity
Conclusion

3.PIEZOELECTRICITY

4.What is piezoelectricity?
Response of applied mechanical stress on the material  

5.Piezoelectricity
Mechanical Stress Electric Potential

6.A piezoelectric disk generates a voltage when deformed

7.MECHANISM
In the crystal +ve
and –ve charges gets
aligned symmetrically
so each of the side
forms an electric dipole.
when a mechanical
Stress is applied this
symmetry is disturbed
and voltage is generated

8.Materials used in piezoelectricity
Natural crystals
Man-made crystals
Man-made  ceramics
Lead free piezoceramics
Polymers

9.Natural crystals
1. Berlinite (AlPO4), a rare phosphate mineral that is structurally identical to quartz
2. Cane sugar
3. Quartz
4. Rochelle salt
5. Topaz
6. Tourmaline-group minerals

10.crystals:-
     1.quartz :-
     hexagonal structure,
     pure and contains traces of other elements Al3+, fe3+,Ti4+,P5+, H+, Li+, Na+, K+.
         
  Density=2.65gm/cm3
     
Shows piezoelectric effect perpendicular to prism axis.