A phase diagram of Ba1-xCaxTiO3 (x = 0-0.30) piezoceramics by Raman spectroscopy
Research output: Contribution to journal › Article › peer-review
Authors
Colleges, School and Institutes
Abstract
Piezoelectric ceramics are widely used in sensors, actuators, and ultrasonic transducers due to their ability to achieve efficient conversion between electric and mechanical energy. There is a current drive toward lead-free material systems capable of achieving comparable piezoelectric performance to environmentally hazardous, but commonly used, lead-based materials such as lead zirconate titanate. This work constructs an accurate phase diagram for barium calcium titanate (Ba1-xCaxTiO3 or BCTO). The substitution of Ca2+ on the Ba-site of BCTO is of much interest due to electric property improvements compared to BaTiO3. In this work, Ba1-xCaxTiO3 (x = 0-0.30) samples have been made by solid-state methods and, following initial characterization by X-ray diffraction (XRD), evaluation of changes in the Raman spectra has allowed accurate determination of the phase transition temperatures and the construction of a phase diagram.
Details
Original language | English |
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Pages (from-to) | 2589-2593 |
Journal | Journal of the American Ceramic Society |
Volume | 101 |
Issue number | 6 |
Early online date | 2 Jan 2018 |
Publication status | Published - Jun 2018 |