A number of materials are known to exhibit the piezoelectric effect, which is the generation of electricity when the material undergoes mechanical stresses. Ferroelectric ceramics, such as lead ziroconium titanate (PZT) are commonly exploited for their piezoelectric properties. Piezoelectric devices have been made in the form of bulk piezoelectrics ceramics or as deposited films on a substrate.
There are certain challenges faced by the current industry, particulary in the processing conditions of such materials. These limit their widespread application and often lead to high costs. The challenges include high processing temperature for ceramic sintering, poor performance in piezoelectric thick film, and environmental concerns on the lead-based materials.
This series of technologies, know-how and in-house capabilities aim to address these concerns.
The technologies and capabiltiies include:
1. Method of producing piezoelectric thick film starting from ceramic material to the deposition on substrate surface by screen printing process
2. New ceramic composition of complex oxides that can be sintered at a lower temperatures of 800 - 900 deg C and at the same time exhibit excellent piezoelectric properties by using columbite synthesis route. Oxides of valence 2 metal elements is used to promote sintering and perovskite phase formation
3. Method of producing lead-free metal-oxide piezoelectric thin films KNN which possess large effective piezoelectric coefficient comparable to lead-based piezoelectric thin film PZT. The preparation method involves chemical solution approach with the introduction of appropriate chelating agents in the KNN precursor solutions.
There are a variety of widespread applications for piezoelectric materials:
We are looking for industry partners: