|About this Abstract
||Materials Science & Technology 2017
||Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
||Effects of DC Electric Fields on Crystallization and Grain-growth in BaTiO<sub>3</sub> Thin Films
||Neal P. Lewis, Gyung Hyun Ryu, Jon-Paul Maria, Elizabeth C. Dickey
|On-Site Speaker (Planned)
||Neal P. Lewis
BaTiO<sub>3</sub> is a widely-used dielectric for ceramic capacitors and typically requires a large thermal budget for processing. High processing temperatures, however, limit material integration and increase the concentration of lattice point defects. While recent research has demonstrated that electric fields can dramatically accelerate the densification of bulk ceramics, little is known about the effects of electric fields on the microstructure development of thin-film ceramics. The current work explores how electric fields influence the crystallization and subsequent microstructure development of BaTiO<sub>3</sub> thin films produced via pulsed laser deposition. The initially amorphous films are annealed at temperatures between 400°C and 900°C with DC electric fields ranging from 0V/cm to 1kV/cm. Both closed-circuit and open-circuit conditions are considered to determine the importance of current density on the microstructure development. A variety of electron microscopy and x-ray diffraction techniques are used to investigate the crystallinity, texture and grain size of the annealed films.