| Autor: |
Sharma, Ankur, Bhaumik, Indranil, Singh, Gurvinderjit, Sagar Tiwari, Vidya |
| Předmět: |
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| Zdroj: |
Physica Status Solidi (B); Oct2021, Vol. 258 Issue 10, p1-8, 8p |
| Abstrakt: |
A correlation between piezoelectric response and its thermal stability with the depolarization temperature and antiferroelectric order in (Na0.41K0.09Bi0.5)(1−x/2)(Ti1−xNbx)O3 (x = 0.00–0.0150) ceramic is investigated. A reasonable increase in the piezoelectric response (20–25%) is observed in a limited composition range (0.0050 ≤ x ≤ 0.010). The piezoelectric thermal stability for the lower niobium concentrations (x < 0.010) is found to be reasonably better than many archetypal lead‐free piezoelectrics. However, a significant thermal instability is observed for the higher niobium content (x ≥ 0.010). The observed thermal instability is attributed to the monotonic decrease in the depolarization temperature with the emergence of antiferroelectric ordering in the vicinity of the ferroelectric‐relaxor crossover region. The increase in the piezoelectric response in the aforementioned composition range is associated with the competition among the ferroelectric domain wall movement and the antiferroelectric order. The outcome of the current study reveals that (Na0.41K0.09Bi0.5)(1−x/2)(Ti1−xNbx)O3 with x = 0.005 is a useful lead‐free piezoelectric with consistent thermal response. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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