|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||K-121: Study of Fe-doped- KNN Ceramic as Multifunctional Material
||Fernando Londono Badillo, Henry Colorado, Alvaro Herrera , Sebastian Amaya, Adriana Echavarria
|On-Site Speaker (Planned)
||Fernando Londono Badillo
Lead free piezoelectric ceramics have received increasing attention from of viewpoint of enviromental protection on the earth in special KNN ceramics are reported to show desirable properties for solid ultrasonic delay line application and ultrasonic transducer. It's low dielectric constant and high electromechanical coupling coefficient. However, a major problem concerning this material is reported to the difficulty in obtaining samples with a high density by conventional preparation and sintering.
The objective of this work was the processing of K0.5 Na0.5NbO3+xFe ceramics (x=0.5, 1.0, 0.5) by conventional sintering technique.
Ceramics with phase pure material, high density, homogeneous microstructure and good electrical characteristics were obtained. The sintering optimum conditions were investigated for the structural, microstructural electrical and physical properties. Such results aided to set the conditions for the processing of Fe-doped-KNN ceramics, which usually favors the elimination of residual porosity. The best characteristics, including high electrical properties were found for x=1.0