Influence of Ca substitution on microstructure and electrical properties of Ba(Zr,Ti)O 3 ceramics

• Main Authors: Pisitpipathsin N., Kantha P., Pengpat K., Rujijanagul G.
• 格式: Article
• 語言: English
• 出版: 2014
• 在線閱讀: http://www.scopus.com/inward/record.url?eid=2-s2.0-84867895690&partnerID=40&md5=079696d2e93819b76c9bd359f8216d0e; http://cmuir.cmu.ac.th/handle/6653943832/6898

In the present work, lead-free (Ba 1-x Ca x )(Zr 0.04Ti 0.96)O 3 (x=0.00-0.09) ceramics were fabricated via a solid-state reaction method. The microstructure and electrical properties of the ceramics were investigated. The microstructure of the BCZT ceramics showed a core shell structure at compositions of x=0.03 and 0.06. The substitution of small amount of Ba 2+ by Ca 2+ resulted in an improvement of the piezoelectric, dielectric and ferroelectric properties of the ceramics. The orthorhombic-tetragonal phase transition was found in the composition of x≤0.03. Piezoelectric coefficient of d 33∼392 pC/N and lowest E c∼3.3 kV/cm with highest P r∼14.1 μC/cm 2 were obtained for the composition of x=0.03 while its Curie temperature (T C) was as high as 125 °C. However, the ferroelectric to paraelectric transition temperature had slightly shifted towards room temperature with increasing Ca 2+ concentration. © 2012 Elsevier Ltd and Techna Group S.r.l.