Abstract
Various amounts of Nb2O5 in the (Na 0.5K0.5) NbO3 (NKN) ceramic were replaced by V2O5 to decrease its sintering temperature to below 950°C. A small V2O5 content resulted in a dense microstructure with an increased grain size for the specimen sintered at 900°C due to the presence of a liquid phase. When V2O5 was added to the NKN ceramics, their orthorhombic-to-tetragonal transition temperature increased from 178°C to around 200°C. However, their Curie temperature decreased from 402°C to around 330°C. The κp, ε3T/ε0, and Qm values increased with V2O5 addition, probably due to the increased density and poling state, which was identified by the phase angle. The specimen with x = 0.05, sintered at 900°C for 8 h, exhibited the following piezoelectric properties: κp = 0.32, ε3 T/ε0 = 245, d33 = 120 (pC/N), and Qm = 232.
Original language | English |
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Article number | 5306715 |
Pages (from-to) | 2337-2342 |
Number of pages | 6 |
Journal | IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control |
Volume | 56 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2009 |
Bibliographical note
Funding Information:manuscript received september 12, 2008; accepted august 10, 2009. This research was supported by a grant from the center for advanced materials Processing (camP) of the 21st century Frontier r&d Program, which was funded by the ministry of commerce, Industry and Energy (mocIE), republic of Korea.
ASJC Scopus subject areas
- Instrumentation
- Acoustics and Ultrasonics
- Electrical and Electronic Engineering