Sabic Global Technologies B.v.

Soma Guhathakurta

Anantharaman Dhanabalan

Venkata Ramanarayanan Ganapathy Bhotla

Suresh Velate

Jesus Alfonso Caraveo Frescas

Anshita Sudarshan

Yogesha Subbaiah

Donald Owens

Theodorus Hoeks Lambertus

Ramanarayanan Ganapathy Bhotla Venkata

Tadhg Mahon

Pallavi Muchukunte Badarinath

Theodorus Lambertus Hoeks

Methods of producing lead-free piezoelectric composites are described. The method can include adding a lead-free piezoelectric additive to a solution that includes a solvent and polymer solubilized therein. The solvent can have i) a boiling point ≥80° C. at 0.1 MPa and ii) a solubility in water of ≥0.1 g/g and/or a dielectric constant ≥20. The solvent can be removed to form a polymeric matrix having the lead-free piezoelectric particles dispersed therein. Electrical treatment of the polymeric matrix can form the piezoelectric component. Lead-free piezoelectric composites and devices that include the lead-free piezoelectric composites are also described.

Lead-free piezo composites and methods of making thereof

Disclosed is a composite comprising: a polymer matrix formed from one or more of a monomer or a precursor polymer; and an in-situ dispersion of a piezoelectric ceramic filler and an ionic additive within the polymer matrix, wherein the composite exhibits a dof at least 1 pC/N when measured using a piezoelectric meter. Disclosed also herein are methods of forming the composite.

Polymeric piezoelectric composite compositions including passive polymer matrices

A polymer composite exhibiting piezoelectric properties can be formed for flexible and/or thin film applications, in which the polymer composite includes a polymer matrix and a piezoelectric ceramic filler embedded in the polymer matrix. The polymer matrix may include at least two polymers: a first polymer and a second polymer. The first polymer may be a fluorinated polymer, and the second polymer may be compatible with the first polymer and have a dielectric constant of less than approximately 20. The piezoelectric ceramic filler can be lithium doped potassium sodium niobite (KNLN), and be approximately 40-70% by volume of the polymer composite. The remaining 30-60% by volume may be the polymer matrix, which may itself be approximately 5-20% by weight second polymer and 80-95% fluorinated polymer.

Piezoelectric polymer blend and composite compositions including lithium-doped potassium sodium niobate

A dielectric polymeric composition comprising a polymeric matrix comprising structural units derived from a polymerizable vinyl monomer; an ionic liquid comprising an organic cation and a balancing anion, wherein the ionic liquid is miscible or partially miscible with the polymerizable vinyl monomer, and wherein the concentration of ionic liquid in dielectric polymeric composition ranges from 0.5 to 30 wt. %; and less than 10 ppm of unreacted polymerizable vinyl monomer, based on the total weight of the composition, wherein an amount of unreacted polymerizable vinyl monomer in the composition is measured via HPLC. The polymeric matrix further comprises structural units derived from a polymerizable co-monomer comprising a functional group that has the ability to form hydrogen bonds within the polymeric matrix. The polymeric matrix further comprises a crosslinking agent, and wherein the polymeric matrix comprises covalent crosslinks between the crosslinking agent and the structural units derived from the polymerizable vinyl monomer.

Ionic polymer compositions

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Soma Guhathakurta