Effect of ZnO nano-particulate modification on properties of PZT-BLT ceramics

• Main Authors: Promsawat,M., Watcharapasorn,A., Jiansirisomboon,S.
• Format: Conference or Workshop Item
• Published: Elsevier Limited 2015
• Subjects: Surfaces, Coatings and Films; Materials Chemistry; Electronic, Optical and Magnetic Materials; Ceramics and Composites; Process Chemistry and Technology
• Online Access: http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84655176424&origin=inward; http://cmuir.cmu.ac.th/handle/6653943832/38613
• Institution: Chiang Mai University

This research was conducted to study the effect of ZnO nano-particulate modification on properties of Pb(Zr 0.52Ti 0.48)O 3 (PZT)-(Bi 3.25La 0.75)Ti 3O 12 (BLT) ceramics prepared by a mixed-oxide solid-state sintering method. ZnO nano-particulate was added into PZT-BLT ceramics to obtain PZT-BLT/xZnO (x = 0, 0.1, 0.5 and 1.0 wt%). The PZT-BLT/xZnO ceramics were investigated in terms of phase, microstructure, physical, electrical, and mechanical properties. Tetragonality of PZT-BLT crystal structure tended to increase with increasing ZnO content. ZnO addition obviously increased the density of PZT-BLT ceramics while the grain size slightly decreased. Intergranular fracture mode was observed for pure PZT-BLT ceramic while the samples contained ZnO nano-particles showed a mixed-mode inter-/trans-granular fracture. Addition of ZnO also affected hardness and fracture toughness values. Addition of ZnO nano-particulate into PZT-BLT ceramics was found to improve room temperature dielectric constant but did not have a significant effect on ferroelectric properties. These observed results were expected to be caused by the behaviors similar to a donor-doped system. © 2011 Elsevier Ltd and Techna Group S.r.l.