Title :
High Strain and Piezoelectric Characteristics of Textured Bi0.5(Na0.85K0.15)0.5TiO3 Ceramics
Author :
Ahn, Chang Won ; Lee, Hai Joon ; Kang, Sun Hee ; Lee, Jae Young ; Kim, Ill Won ; Lee, Jae-Shin
Author_Institution :
Department of Physics, University of Ulsan, 680-749, Korea
Abstract :
The anisotropy of polarization and strain behavior in textured Bi0.5(Na0.85K0.15)0.5TiO3 ceramics are investigated for lead-free piezoelectric ceramics actuators. The textured Bi0.5(Na0.85K0.15)0.5TiO3 ceramics are fabricated by reactive templated grain growth (RTGG) using plate-like Bi4Ti3O12 particles. RTGG[//] (sliced parallel to the casting direction) and RTGG[//] (sliced perpendicularly to the casting direction) specimens show preferred orientation to ≪001≫pc and ≪IIO≫pc, respectively. RTGG[//] specimen has relatively high piezoelectric coefficient of (d33)~335 pm/V and electric field induced strain levels of 0.067% at 20 kV/cm. This values were 86% higher than those of RTGG[¿] specimen. ≪00l≫pc textured polycrystalline BNKT ceramics, prepared by RTGG, are a strong candidate for lead-free piezoelectric materials of actuators.
Keywords :
Anisotropic magnetoresistance; Bismuth; Capacitive sensors; Ceramics; Environmentally friendly manufacturing techniques; Piezoelectric materials; Piezoelectric polarization; Powders; Solids; Titanium compounds; bismuth sodium potassium titanate; piezoelectric; reactive templated grain growth; texture;
Conference_Titel :
Applications of ferroelectrics, 2006. isaf '06. 15th ieee international symposium on the
Conference_Location :
Sunset Beach, NC, USA
Print_ISBN :
978-1-4244-1331-7
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2006.4349275
