PPT ON SOFT TRANSDUCER MATERIALS FOR ENERGY CONVERSION

PPT On Soft Transducer Materials For Energy Conversion
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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.

Source: Power Point Presentations