Abstract:
The invention is directed to a transparent piezoelectric device (2) comprising a transparent substrate (4); a transparent piezoelectric layer (6); a transparent layer (8) of interdigitated electrodes. The transparent piezoelectric layer (6) is disposed between the substrate (4) and the layer (8) of interdigitated electrodes. A transparent dielectric layer (10) of l-30nm thickness is disposed between the substrate (4) and the piezoelectric layer (6).
Abstract:
A method for the manufacture of a piezoelectric thin film element comprising a first electrode,a second electrode and one or more piezoelectric thin films there between which method comprises forming a piezoelectric thin film comprising PZT by a chemical solution deposition using three solutions wherein the forming of the PZT thin film comprises forming a bulk PZT thin film layer from the three solutions, wherein each solution has a Zr/Ti content which is different from that of any other solution and at least one solution has an excess lead content greater than that of any other solution, such that the bulk PZT thin film layer has a substantially uniform lead content and Zr/(Zr+Ti) ratio in its thickness direction.
Abstract:
The invention relates to a fibre (1) consisting of a ferroelectric material with a perovskite structure, characterised in that said fibre is essentially a monocrystalline body. To produce the fibre, a polycrystalline fibre comprising fine primary particles of the ferroelectric material is prepared, said particles being converted into the monocrystalline body consisting of ferroelectric material by means of secondary re-crystallisation. The monocrystalline fibre exhibits a higher ferroelectric and piezoelectric effect in comparison to the polycrystalline fibre. It is beneficial if several fibres are combined to form components (4,9) in the form of actuators, sensors and composite transformers. The fibres are bonded, for example, by means of secondary re-crystallisation, sintering or plastic embedding.
Abstract:
A method of forming a piezoelectric device may include depositing a sol-gel film over a substrate and curing the sol-gel film by impinging light onto an exposed surface of the sol-gel film to form a piezoelectric ceramic element. The method may produce a piezoelectric composite material including at least two piezoelectric ceramic pillars over the substrate. The at least two piezoelectric pillars may include at least one layer. The at least one layer having a gradient density, such that a first portion of the at least one layer proximate the substrate has a density lower than a second portion that is located a greater distance from the substrate than the first portion. The piezoelectric composite material may further include a resin separating the at least two piezoelectric ceramic pillars.
Abstract:
A piezoelectric thin film element comprising a first electrode, a second electrode and one or more piezoelectric thin films there between wherein the first electrode is a platinum metal electrode having an average grain size greater than 50 nm and wherein a piezoelectric thin film adjacent the platinum metal electrode comprises a laminate having a plurality of piezoelectric thin film layers wherein a piezoelectric thin film layer contacting the platinum metal electrode comprises lead zirconate titanate (PZT) of composition at or about PbZr x Ti 1 - x O 3 where 0