Piezoelectric and Ferroelectric Copolymers & Inks

Well-ordered polymer chains with strong dipoles from carbon-fluoride bonds, lead to the very special piezoelectric and ferroelectric properties of these P(VDF-TrFE) copolymers.

Piezotech® FC

P(VDF-TrFE) copolymers, named Piezotech® FC, exhibit high piezoelectric responses over a wide range of temperatures in their poled ferroelectric phase:  

  • High thermal stability of the piezoelectric properties
  • Low power consumption: external power source unnecessary
  • Good mechanical properties
  • High coupling factor
  • Wide frequency range
  • Transparency
  • Chemical resistance
  • High dielectric strength

 

Compared to PVDF homopolymer, these materials display severals advantages: 

  • Upper thermal stability (80 °C for PVDF versus 130°C for Piezotech® FC20)
  • Improved coupling factor (0.15 for PVDF versus 0.3 for P(VDF-TrFE))
  • Printable
  • Enhanced piezoelectric properties (higher d33)

Piezotech® FC Powders

P(VDF-TrFE) powders are available in a variety of VDF/TrFE ratios.

 

Specific composition or molecular weight can be produced upon request.

Product name

Typical TrFE content

(mol%)

Typical Curie temperature

(°C)

Typical remnant polarization at 150 V/µm

(mC/m²)

Typical d33

(pC/N)

Piezotech® FC20

20

136

85

 

-24 to -30 

 

Piezotech® FC25

25

115

70

Piezotech® FC30 30 100 65  -18 to -22 
Piezotech® FC45 45 60 45
Electroactive ink 3

Piezotech® FC Inks

Solvents and concentrations have been defined to allow for the use of standard printing conditions. 4 standard formulations adapted for conventional techniques are available.

 

Standard Piezotech® FC Inks are formulated with Piezotech® FC20 polymer powder.

Specific inks can be formulated upon request. 

Grade Technology

Viscosity

(mPa.s at 32 °c)

Thickness range

(µm)

Indicative dry content

(wt%)

 

Ink L

Spin-coating

Slot-die

< 1000 0.1 - 2 7
Ink H

Spin-coating

Solvent-casting

1500 - 3000

Spin-coat: 0.5 – 2

Solvent-cast: 2 - 80

20
Ink P Screen-printing 12000 - 24000 1 - 10 17.5
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