Are lead-free piezoelectrics more environmentally friendly?

Springer Science and Business Media LLC - 2017
Taofeeq Ibn‐Mohammed1, S.C. Lenny Koh2, Ian M. Reaney3, Derek C. Sinclair3, K.B. Mustapha4, Adolf Acquaye5, D. Wang3
1Centre for Energy, Environment and Sustainability, The University of Sheffield, Sheffield, UK
2Advanced Resource Efficiency Centre, The University of Sheffield, Sheffield, UK
3Departments of Materials Science and Engineering, The University of Sheffield, Sheffield, UK
4Departments of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Malaysia Campus, Selangor Darul Ehsan, Malaysia
5Kent Business School, University of Kent, Canterbury, UK

Tóm tắt

AbstractConsidered as a less hazardous piezoelectric material, potassium sodium niobate (KNN) has been in the fore of the search for replacement of lead (Pb) zirconate titanate for piezoelectrics applications. Here, we challenge the environmental credentials of KNN due to the presence of ~60 wt% Nb2O5, a substance much less toxic to humans than Pb oxide, but whose mining and extraction cause significant environmental damage.

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