首页|Comments on: [High temperature stability and mechanical quality factor of donor-acceptor co-doped BaTiO3 piezoelectrics]
Comments on: [High temperature stability and mechanical quality factor of donor-acceptor co-doped BaTiO3 piezoelectrics]
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NSTL
Elsevier
A recent paper entitled "High temperature stability and mechanical quality factor of donor-acceptor co-doped BaTiO3 piezoelectrics" (Song et al., Acta Materialia, 181(2019) 200-206) reported a surprisingly high electromechanical quality coefficient Q(m) similar to 2010 in their BaTiO3-based Pb-free piezoelectric materials. In this commentary we show that such high Q(m) value appears to arise from a mistaken adoption of resonance and anti-resonance frequencies, which is inconsistent with the IEEE standard for Q(m) measurement. By using a commercial PZT-8 sample with manufacturer-certified Q(m) value and electromechanical coupling coefficient kp value, we demonstrate that the calculation method used in the above paper can lead to an overestimation of Q(m) value by 82 times and underestimation of kp to 1/10 of its correct value.
Mechanical quality factorLead-free piezoelectric ceramicResonance frequency
NSTL
Elsevier
