Effects of Sr and Mn-Doping on the Electrical Properties of CaBi₄Ti₄O₁₅-Based Ceramics

Abstract:

Lead-free Sr-and Mn-doped Ca_1-xSr_xBi₄Ti₄O₁₅, Ca_1-yMn_yBi₄Ti₄O₁₅ bismuth layer piezoelectric ceramics have been prepared. The microstructure and electrical properties of the products were studied by XRD, SEM and Broadband LRC digital bridge. The obtained ceramics have Bi-layer perovskite phase. The dopings do not change the crystal phase of CaBi₄Ti₄O₁₅. However, the doping amounts affect the size of crystal grain and porosity of the final products. The appropriate amounts of dopings for obtaining the highest dielectric constant and the lowest dielectric loss are determined. The prepared ceramics show the largest piezoelectric constant of 5.2~5.3 pC/N with the optimal Sr-and Mn-dopings.

• Periodical: Key Engineering Materials (Volumes 575-576)
• Pages: 494-498
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.575-576.494
• Online since: September 2013
• Authors: Bin Fu, Yang Lu Hou, Ting Li, Xing Hua Fu
• Keywords: Bismuth-Layer-Structured, Dielectric Property, Piezoelectric Ceramic (PZT), Piezoelectric Properties

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