A Large Piezoelectric Strain Recorded in BCT Ceramics Obtained by a Modified Pechini Method

Abstract

There is a strong need in the industry to develop lead-free piezoelectrics for sensors and actuators. Although these materials have become an important component of many electronic devices, it is very important for the industry to decarbonise ceramic technology, especially through the introduction of modern sintering technologies. Among the many piezoelectric compounds available, Calcium Barium Titanate (BCT) have been widely investigated because of its similar performance to lead-containing Lead Titanate Zirconate (PZT). In this paper, a modified Pechini method for obtaining ceramic Ba0.9Ca0.1TiO3 nano-powders is described. Deviation from the established procedure resulted in the precipitation of the solution or obtaining of a low-quality (poorly crystallized) product with numerous impurities. The samples of BCT materials were examined to find their ideal microstructures and structures; these factors were confirmed by their outstanding X-ray diffraction spectra and high piezoelectric constant values that are comparable to commercial lead-containing materials.

Crossover from Ferroelectric to Relaxor Behavior in Ba1−xCaxTiO3 (x = 0.17) System

“…Therefore, various mixed systems based on BaTiO 3 are investigated very often [4]. Moreover, it is expected that various mixed BaTiO 3 based systems can substitute lead based piezoelectrics in various applications [5][6][7]. A variety of FE phase transition smearing scenarios are possible by the substitution of several ions in the BaTiO 3 lattice [8][9][10].…”