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The exploration on the origin of enhanced piezoelectric properties in metal ion doping ( K , Na ) NbO 3 based lead-free ceramics
| Content Provider | Semantic Scholar |
|---|---|
| Author | Xu, Fang Chen, Jingsheng Lu, Yinmei Zhang, Qingfeng Zhang, Qi Zhou, Taosheng He, Yunbin |
| Copyright Year | 2019 |
| Abstract | In this work, we studied the effects of Ni2O3 and CO2O3 contents on the crystal structure, microstructure, orthorhombic-tetragonal phase transition temperature (To-t), and electrical properties of [(K0.43Na0.57)0.94Li0.06][(Nb0.94Sb0.06)0.95 Ta0.05]O3(KNLNST) lead-free ceramics. It was found that the Ni2O3 addition with appropriate amount could shift the To-t downwards to the room temperature, and thus obviously increased the room temperature piezoelectric coefficient (d33), planar electromechanical coupling coefficient (kP), dielectric coefficient (∑r) and the remnant polarization (Pr). These were consistent with experimental results observed in Fe2O3 doping KNLNST ceramics. On the contrary, CO doping shifted continuously the To-t upward and deteriorated obviously piezoelectric properties of KNLNST ceramics. Fe, Co and Ni have similar ion radii and thus they play the same doping role (accept or donor doping) during sintering process. All these mean that the coexistence of orthorhombic and tetragonal phase at room temperature, rather than ion doping was the main reason for enhanced room-temperature piezoelectric properties in metal ion doping KNLNST lead-free ceramics. This work provides a new way for designing and developing new lead-free material with high piezoelectric properties at room temperature. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://dspace.lib.cranfield.ac.uk/bitstream/handle/1826/13774/origin_of_enhanced_piezoelectric_properties-2018.pdf?isAllowed=y&sequence=4 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
