1. Piezoelectricity Material from 3.6 Piezoelectric effect
8.4 Piezoelectric accelerometer
Appendix A
Extra material on porous polypropylene

2. Porous polypropylene ------ E ++++ Voltage q , ------ d ++++
p = dq
Polarization/dipoles

3. Effect of tension ------ -F E Increased ++++ voltage Increased ------
polarization
------
++++ p -F

4. Polarisasjonstetthet/ overflateladning+σ A + - + - p + - + - d d + - + - + - + - -σ
p: dipolmoment/volumenhet
σ: flateladning (Q= σA)
Totalt dipolmoment:
Totalt dipolmoment:

5. Piezoeectric coefficient
Displaced Charge
++++
------ E
Increased
voltage in terms
of displaced charge
Capacitance -F V
Polarization
Force/Area
Increased
polarization
------
++++ p z -F
Piezoelectric coefficient

6. Quartz (SiO2)

7. PZT

8. Poling

9. PVDF

10. Piezoelektric accelerometer

11. Piezoelectric tensor

12. Bending mode

13. The converse effect (electro->piezo)

14. Material Parameters