Details

Autor(en) / Beteiligte

• Ni, Haimin
• Luo, Laihui
• Li, Weiping
• Zhu, Yuejin
• Luo, Haosu

Titel

Preparation and electrical properties of Bi sub(0.5Na) sub(0).5TiO sub(3-BaTiO) sub(3)-KNbO sub(3 lead-free piezoelectric ceramics)

Ist Teil von

• Journal of alloys and compounds, 2011-03, Vol.509 (9), p.3958-3962

Erscheinungsjahr

2011

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• Lead-free (1 - x)Bi sub(0.47Na) sub(0).47Ba sub(0.06TiO) sub(3)-xNbO sub(3 (BNBT-x)KN, x = 0-0.08) ceramics were prepared by ordinary ceramic sintering technique. The piezoelectric, dielectric and ferroelectric properties of the ceramics are investigated and discussed. The results of X-ray diffraction (XRD) indicate that KNbO sub(3 (KN) has diffused into Bi) sub(0).47Na sub(0.47Ba) sub(0).06TiO sub(3 (BNBT) lattices to form a solid solution with a pure perovskite structure. Moderate additive of KN (x <= 0.02) in BNBT-x)KN ceramics enhance their piezoelectric and ferroelectric properties. Three dielectric anomaly peaks are observed in BNBT-0.00KN, BNBT-0.01KN and BNBT-0.02KN ceramics. With the increment of KN in BNBT-xN ceramics, the dielectric anomaly peaks shift to lower temperature. BNBT-0.01KN ceramic exhibits excellent piezoelectric properties and strong ferroelectricity: piezoelectric coefficient, d sub(33 = 195 pC/N; electromechanical coupling factor, k) sub(t) = 58.9 and k sub(p = 29.3%; mechanical quality factor, Q) sub(m) = 113; remnant polarization, P sub(r = 41.8 [micro]C/cm[super]2; coercive field, E) sub(c) = 19.5 kV/cm.