Refreshing Piezoelectrics: Distinctive Role of Manganese in Lead-Free Perovskites.
Authors of this article are:
Yao FZ, Zhang MH, Wang K, Zhou JJ, Chen F, Xu B, Li F, Shen Y, Zhang QH, Gu L, Zhang XW, Li JF.
A summary of the article is shown below:
Driven by an ever-growing demand for environmentally compatible materials, the past two decades have witnessed the booming development in the field of piezoelectrics. To maximally explore the potential of lead-free piezoelectrics, chemical doping could be an effective approach, referenced from tactics adopted in lead-based piezoelectrics. Herein, we reveal the distinct role of manganese in a promising lead-free perovskite (K, Na)NbO3 (denoted by KNN) in comparison to that in market-dominating lead-based counterparts [Pb(Zr, Ti)O3, PZT]. In contrast to the scenario in PZT, manganese doping in KNN results in tremendously improved piezoelectric coefficient d33 by nearly 200%, whereas the same doping species in PZT deteriorates the d33 down to less than 30% of its original value. The result is rationalized from macroscopic and local electrical characterizations down to atomic-scale visualization. This study demonstrates that there is enormous space to further enhance piezoelectricity in lead-free systems because the chemical doping effect may completely differ in lead-containing and lead-free perovskites.
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This article is a good source of information and a good way to become familiar with topics such as:
(K,Na)NbO3;lead free;manganese doping;perovskite;piezoelectric
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