| Autor: |
Antonio Iacomini, Sebastiano Garroni, Gabriele Mulas, Stefano Enzo, Luca Cappai, Marzia Mureddu, Costantino Cau, Álvaro García, Lorena Pardo |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Open Ceramics, Vol 9, Iss , Pp 100247- (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2666-5395 |
| DOI: |
10.1016/j.oceram.2022.100247 |
| Popis: |
“Lead free” piezoceramics 0.99K0.5Na0.5NbO3-0.01BiFeO3 (KNN–BF) with increasing amount of CuO (0, 0.5, 1 wt.%) were prepared through a scalable combination of High Energy Ball Milling, calcination at 900 °C and air sintering. The effect of CuO on the sintering behaviour and electrical properties of KNN–BF was investigated. The compositions examined show high-density values (>95% of TD) at their optimized sintering temperatures. Small addition of CuO (0.5 wt.%) causes an increase in the size of grains, however an excess of CuO (1 wt.%) inhibits the growth of grains due to the excess of liquid phase. The KNN–BF composition shows promising electrical properties (d33 = 150 pC/N; kp = 42%; Qm = 150) which are mainly related to the high density achieved and to the orthorhombic-tetragonal symmetry coexistence. The addition of 0.5 wt.% of CuO causes an increase in the quality factors (Qm = 235; Q(d31) = 207). |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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