Antiferroelectric polymer composites, methods of manufacture thereof, and articles comprising the same
View Patent ↗Disclosed herein is a composition comprising a composition comprising a polymeric material; and a ceramic antiferroelectric particle. Disclosed herein too is a method of tuning a dielectric constant of a composition comprising subjecting a composition comprising a polymeric material and a ceramic antiferroelectric particle to a biasing electric field; and changing the dielectric constant of the composition. Disclosed herein too is a method comprising blending a polymeric material with ceramic antiferroelectric particles to form a composition. Disclosed herein too is a method comprising blending a polymeric material with ceramic antiferroelectric particles to form a composition; applying an electrical field to the composition; and reorienting the ceramic antiferroelectric particles.
1. A composition comprising:
a polymeric material; and
ceramic antiferroelectric particles having a particle size of from about 10 nanometers to about 500 nanometers;
wherein the antiferroelectric particles comprise PbHfO 3 , PbLa(ZrSnTi)O 3 , PbNb(ZrSnTi)O 3 , lead scandium niobium titanate (PSNT), lead lutetium niobium titanate (PLuNT), NaNbO 3 , (K,Na)(Nb,Ta)O 3 , KNbO 3 , BaZrO 3 , Na 0.25 K 0.25 Bi 0.5 TiO 3 , Ag(Ta,Nb)O 3 , K 0.5 Bi 0.5 TiO 3 —BaTiO 3 , or a combination of these and wherein the ceramic antiferroelectric particles are present in an amount of greater than about 10 wt % of the total weight of the composition.
2. The composition of claim 1 , wherein the polymeric material comprises a thermoplastic polymer.
3. The composition of claim 2 , wherein the polymeric material comprises one or more polyetherimides, polyvinylidene fluoride, modified polyvinylidene fluorides, or a combination of these.
4. The composition of claim 1 , wherein the polymeric material comprises a thermosetting polymer.
5. The composition of claim 1 , wherein the antiferroelectric particle in the antiferroelectric state has a dielectric constant whose value is within 50% of the value of the dielectric constant of the polymeric material.
6. The composition of claim 1 , wherein the polymeric material is used in amount of from about 50 wt % to about 99.3 wt % of the total weight of the composition.
7. The composition of claim 1 , wherein at least a portion of the ceramic antiferroelectric particles are surface treated.
8. The composition of claim 7 , wherein the surface treatment comprises a silane coupling agent.
9. The composition of claim 8 , wherein the surface treatment agent comprises tetramethylchlorosilane, hexadimethylenedisilazane, gamma-aminopropoxysilane, or a combination of these.
10. The composition of claim 1 , wherein the antiferroelectric particles are present in an amount of greater than or equal to about 30 wt % of the total weight of the composition.
11. The composition of claim 1 , wherein the antiferroelectric particles are present in an amount of less than or equal to 85 wt % of the total weight of the composition.
12. The composition of claim 11 , wherein the antiferroelectric particles are present in an amount of less than or equal to about 70 wt % of the total weight of the composition.
13. An article manufactured using the composition of claim 1 .
14. The article of claim 13 , wherein the article is a capacitor or a component for a spark plug.