Dielectrics

1. Classification of dielectric materials

2. The environmental mandate

3. (Bi0.5Na0.5)TiO3–BaTiO3 ceramics
Morphotropic Phase Boundary
T. Takenaka et al. JJAP 30, 2236 (1991)
Improve Piezoelectric
Property

4. (1-x)(Bi0.5Na0.5)TiO3+xBaTiO3 ceramics
Fig. XRD patterns of (1−x)BNT−xBT ceramics after sintering at 1150 °C for 2 h in air. MPB
appears to exist at 5 ≤ x ≤ 7 mol % as marked by arrows. R and T indicate rhombohedral and
tetragonal BNT-BT peaks, respectively.

5. 90-α cT/aT
Fig. Composition dependent piezoelectric coefficient (d33) of
(1-x)BNT-xBT ceramics together with Td.
toward MPB,
lattice distortion
d33
Td
(1-x)(Bi0.5Na0.5)TiO3+xBaTiO3 ceramics

6. Lead-free BNT-BZ ceramics
1-x(Na0.5Bi0.5)TiO3 – xBaZrO3 (BNT-BZ ) x = 0 – 0.10
Rahman et al. Curr. Appl. Phys. 14 (3), 331-336 (2014).

7. Bi0.5K0.5TiO3
Journal of Elec Materi 47, 2103–2109 (2018)

8. Continue…
R.A. Malik et al. / Journal of Alloys and Compounds 682 (2016) 302