Li, Ta modified (K,Na)NbO single crystals with the size of 18 mm × 18 mm × 10 mm were successfully grown by top-seeded solution growth method, with orthorhombic-tetragonal phase transition temperature ~79 °C and Curie temperature ~276 °C. The electromechanical coupling factors and were found to be ~88% and ~65%, respectively. The piezoelectric coefficient for the [001] poled crystals reached 255 pC/N. In addition, the electromechanical coupling factor exhibited high stability over the temperature range of -50 °C to 70 °C, making these lead free crystals good candidates for electromechanical applications.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4232956 | PMC |
| http://dx.doi.org/10.1002/pssr.201308173 | DOI Listing |
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Enhanced dielectric and electrical performance of phosphonic acid-modified tantalum (Ta)-doped potassium sodium niobate (KNaNbO)-P(VDF-HFP) composites.
Eur Phys J E Soft Matter
March 2023
University Centre for Research and Development (UCRD), Department of Physics, Chandigarh University, Mohali, Gharuan, Punjab, India.
Article Synopsis
- Researchers created PA-KNNT-P(VDF-HFP) composite films using a simple solution casting method, which are attractive due to their applications in dielectric and electrical systems.!
- The composite films showed improved dielectric and electrical properties, significantly enhancing the dielectric constant by approximately 119 compared to the P(VDF-HFP) matrix with a 19 wt.% filler loading.!
- The PA-KNNT-P(VDF-HFP) composites also exhibited a transition from insulator to conductor at a percolation threshold of 13.4 wt.%, indicating their promising potential for use in various electronic applications.!
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