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In the search for high-performance piezoelectrics, (1- y )(Na 0.5 K 0.5 )NbO 3 – y PbTiO 3 ( y ≤0.50) solid solution has been prepared using the spark-plasma-sintering method. Dielectric investigation reveals that both the ferroelectric phase transition temperatures and the peak value of the dielectric constant are strongly suppressed in the low y range. However, improved electromechanical coupling constants are observed at the same y range. These properties are explained by considering factors such as composition, crystal structure, ferroelectric domain microstructure, and poling conditions.
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Wang et al. (2002) studied this question.
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