We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Large Field-Induced Strain Properties of Sr(KNb) O-Modified Bi(NaK)TiO Lead-Free Piezoelectric Ceramics.
- Authors
Tran, Vu; Ullah, Aman; Dinh, Thi; Lee, Jae-Shin
- Abstract
Lead-free piezoelectric ceramics with compositions of (1 − x)Bi(Na K)TiO + xSr(KNb)O, which are abbreviated as (1 − x)BNKT- xSKN with x = 0, 0.01, 0.02, 0.03, 0.04, and 0.05, were synthesized using a conventional solid-state reaction method. The effects of SKN addition on the BNKT system were examined in terms of the phase transition, strain behavior, and ferroelectric and dielectric properties. X-ray diffraction revealed a single perovskite phase for all compositions. The results showed that with increasing SKN content, BNKT-SKN underwent a phase transition from the coexistence of rhombohedral and tetragonal phases to a tetragonal phase. The addition of SKN shifted the depolarization temperature, T, to a lower temperature and enhanced the diffuseness of the dielectric peaks. The polarization and bipolar strain hysteresis loops of BNKT-SKN showed that the addition of SKN induced a ferroelectric to ergodic relaxor phase transition with a disruption of the ferroelectric order of pure BNKT. As a result, the strain of BNKT-SKN improved significantly with increasing SKN content and reached the highest value of a normalized strain, S/ E of 557 pm/V, when modified with 3 mol.% SKN.
- Subjects
STRONTIUM compounds; BISMUTH compounds; LEAD-free ceramics; PIEZOELECTRIC ceramics; CHEMICAL synthesis; SOLID state chemistry
- Publication
Journal of Electronic Materials, 2016, Vol 45, Issue 5, p2627
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-016-4445-1