Microstructure and piezoelectric properties of Na0.5K0.5NbO3–BiNiO3–LiSbO3 lead-free ceramics
- Resource Type
- Article
- Authors
- Liu, Chaoying; Liu, Xinyu; Jiang, Minhong; Ma, Jiafeng
- Source
- Journal of Alloys & Compounds. Jul2010, Vol. 503 Issue 1, p209-212. 4p.
- Subject
- *PIEZOELECTRIC ceramics
*MICROSTRUCTURE
*PEROVSKITE
*LEAD
*SINTERING
*PHASE transitions
*FERROELECTRICITY
*CURIE temperature
- Language
- ISSN
- 0925-8388
Abstract: Lead-free (0.94− x)Na0.5K0.5NbO3–xBiNiO3–0.06LiSbO3 piezoelectric ceramics have been sintered at 1105°C by ordinary solid mixed oxide method. The phase transitional behavior and various electrical properties were investigated. All samples are typical ABO3 style perovskite structure. A morphotropic phase boundary between orthorhombic and tetragonal ferroelectric phases has been identified in the composition range of 0.002≤ x ≤0.004. Main piezoelectric parameters of these ceramics were optimized around x =0.002 with an enhanced piezoelectric constant d 33 of 240pCN−1, a planar electromechanical coefficient k p of 44%, a mechanical factor Q m of 38, and a Curie temperature T c of 360°C. These results indicate the materials studied have a promising future in a wide range of applications. [Copyright &y& Elsevier]