Monitoring the ferroelectric phase transition of barium titanate ceramics via impulse excitation

Impulse excitation is a suitable tool to determine the temperature dependence of Young’s modulus and monitor ferroelectric phase transition unpoled barium titanate ceramics (tetragonal-to-cubic vice versa). By measurement from room 200–300 °C back, it found that there an elastic anomaly with sharp minimum (at 120 during heating 110 cooling, completely reproducible hysteresis), below above which exhibits values 40–50 GPa up 90 GPa, respectively, damping changes abruptly order 0.01 less than 0.001.