Effect of doped Mn on piezoelectric properties of (Na0.5Bi0.5)0.92Ba0.08TiO3 lead-free ceramics

Xiao-yuan Zhou; Hao-shuang Gu; Wei-young Li

doi:10.1007/s11771-005-0141-7

Journal of Central South University ›› 2005, Vol. 12 ›› Issue (3) : 266 -268. DOI: 10.1007/s11771-005-0141-7

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Effect of doped Mn on piezoelectric properties of (Na_0.5Bi_0.5)_0.92Ba_0.08TiO₃ lead-free ceramics

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Abstract

Piezoelectric ceramics (Na_0.5Bi_0.5)_0.92Ba_0.08TiO₃+x%MnCO₃ (BNBT-Mn, x=0−1.6, mass fraction) were synthesized by conventional solid state reaction. The results show that when the addition of MnCO₃ is 0 – 1.4%, BNBT-Mn ceramics exhibit a single-phase perovskite structure. With the increase of content of MnCO₃, piezoelectric constant and electromechanical coupling factor increase rapidly when x is lower than 0.3. Then they both decrease when x is in the range of 0.3 and 1.6. When x=0.3, piezoelectric constant and electromechanical coupling factor reach the maximum value of 160 pC/N and 58.5% respectively, which can improve the temperature stability of BNBT-Mn.

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lead-free ceramics / Mn / piezoelectric properties

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Xiao-yuan Zhou, Hao-shuang Gu, Wei-young Li. Effect of doped Mn on piezoelectric properties of (Na_0.5Bi_0.5)_0.92Ba_0.08TiO₃ lead-free ceramics. Journal of Central South University, 2005, 12(3): 266-268 DOI:10.1007/s11771-005-0141-7