Extrusion & Post
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Microcracks in piezoelectric films
Problem Phenomenon
Microcracks appear in the film during stretching and polarization
Cause Analysis
The stretching ratio is too large, the temperature is improper, and molecular chains break
Solution
Stretching ratio 4-5:1, temperature 80-120C, biaxial stretching
Key Takeaway
Piezoelectric films are extremely sensitive to process conditions
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