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Role of Extrinsic Contribution to Temperature Stability of Piezoelectricity for (K,Na)NbO3-(Bi,M)ZrO3 Ceramics with Morphotropic Phase Boundary
| Content Provider | MDPI |
|---|---|
| Author | Lee, Gyoung-Ja Lee, Min-Ku |
| Copyright Year | 2020 |
| Description | Temperature stability of dielectric, ferroelectric, and piezoelectric properties were investigated in situ by choosing (K,Na)NbO3-(Bi,K)ZrO3 (KNN-BKZ), (K,Na)NbO3-(Bi,Na,K,Li)ZrO3 (KNN-BNKLZ), and (K,Na)NbO3-(Bi,Li)ZrO3-(KNN-BLZ) as representative ceramics with rhombohedral-orthorhombic-tetragonal (R-O-T), R-T, and enriched T phase boundaries, respectively. The KNN-BNKLZ ceramics, which have an R-T phase boundary, showed the highest piezoelectricity but the worst temperature stability. On the other hand, the KNN-BLZ ceramics, which have an enriched T-phase, were slightly worse in terms of piezoelectricity compared to the R-O-T or R-T phase boundary, but their thermal stability was the best. From analyses of an extrinsic contribution by a difference between the small signal d33 and εrPr and an intensity variation of the (002) and (200) X-ray diffraction peaks for the KNN-based ceramics, it was suggested that increasing the extrinsic contribution in the morphotropic phase boundary region improves the piezoelectricity but decreases the thermal stability. |
| Starting Page | 1972 |
| e-ISSN | 19961073 |
| DOI | 10.3390/en13081972 |
| Journal | Energies |
| Issue Number | 8 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-04-16 |
| Access Restriction | Open |
| Subject Keyword | Energies Ceramics Lead-free Piezoelectric Ceramics Morphotropic Phase Boundary Temperature Stability Extrinsic Contribution |
| Content Type | Text |
| Resource Type | Article |
