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Piezoelectric properties of polymer/lead-free ceramic composites

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Academic year: 2021

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Figure 1. SEM images of NN NW ’ s (a) and NN P ’ s (b).
Figure 3. XRD patterns of NN NW ’ s (a) and NN P ’ s (b) at RT.
Figure 4. XRD patterns of NN powder at different temperatures. ( ■ ) and (  ) represent the tetragonal and orthorhombic crystalline structure, respectively.
Figure 6. Variation of the piezoelectric coef fi cient d 33 versus volume fraction ( f ) of NN

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