Effect of External Electric Field on the Grain-Growth Behavior of Barium Titanate

• Published in: Journal of the American Ceramic Society Vol. 87; no. 9; pp. 1747 - 1752
• Main Authors: Jin, Hong-Ri, Yoon, Seok-Hyun, Lee, Jong-Heun, Lee, Je-Hun, Hwang, Nong M., Kim, Doh-Yeon, Han, Joo-Hwan
• Format: Journal Article
• Language: English
• Published: Westerville, Ohio American Ceramics Society 01.09.2004; Blackwell; Wiley Subscription Services, Inc
• Subjects: Applied sciences; barium titanate; Building materials. Ceramics. Glasses; Ceramic industries; Ceramics; Chemical industry and chemicals; dopants/doping; Effects; Electric fields; electrochemistry; Electrotechnical and electronic ceramics; Exact sciences and technology; Grain growth; Technical ceramics; External field; High resolution; Grain growth; Doping; Barium titanates; Experimental study; Oxide ceramics; Magnesium addition; Transmission electron microscopy; Niobium addition; Sintering; Manufacturing; Electric field effect; Microstructure; Electroceramics
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1551-2916.2004.01747.x

The effect of an external electric field on the grain‐growth behavior of acceptor Mg‐doped, undoped, and donor Nb‐doped BaTiO3 ceramics was investigated. The acceptor‐doped and undoped specimens showed enhanced grain growth at the positive‐biased region. On the other hand, for the highly donor‐doped specimens, grain growth was enhanced in the negative‐biased region. The results have been explained in terms of defect polarization and the consequent change in the boundary potential. It has been suggested that liquid penetration into grain boundaries is critically dependent on the boundary potential.