Extrusion & Post
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Microcracks in piezoelectric films
Problembeschreibung
Microcracks appear in the film during stretching and polarization
Ursachenanalyse
The stretching ratio is too large, the temperature is improper, and molecular chains break
Lösung
Stretching ratio 4-5:1, temperature 80-120C, biaxial stretching
Wichtigste Erkenntnis
Piezoelectric films are extremely sensitive to process conditions
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