کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7133236 | 1461821 | 2018 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced thermo-electro-mechanical characteristics of purified P(VDF-TrFE) films for ultrasonic transducers
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
In this study, the fabrication process of a piezoelectric poly[(vinylidenefluoride-trifluoroethylene) [P(VDF-TrFE)] film was optimized to maximize its crystallinity and piezoelectric properties and to improve its thermal stability. The effect of purification of P(VDF-TrFE) solution dissolved in methyl ethyl ketone [MEK] and uniaxial stretching on the properties and performance of P(VDF-TrFE) film was studied. In the purification process, the solution was filtered with a syringe filter with 2.7â¯Î¼m pores. X-ray diffraction measurements showed that the stretching and purification processes increased the crystallinity of the P(VDF-TrFE) films by approximately 16.2% and 2.2%, respectively. A high-temperature storage test showed that the unstretched P(VDF-TrFE) films lose most of their polarization after 1-h storage at 70â¯Â°C. The stretching process greatly increased the thermal stability of the films so that the purified and stretched P(VDF-TrFE) films exhibited a small variation within 6% in the piezoelectric strain constant (d33) for 96â¯h at 70â¯Â°C. Ultrasonic transducers (UTs) were also fabricated with the purified and stretched P(VDF-TrFE) films. The pulse-echo measurement showed that the sensitivity and bandwidth of the UTs increased by 4.5â¯dB and decreased by 24.3%, respectively, compared to UTs fabricated with the purified P(VDF-TrFE) film without stretching.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 279, 15 August 2018, Pages 586-592
Journal: Sensors and Actuators A: Physical - Volume 279, 15 August 2018, Pages 586-592
نویسندگان
Cheon-Ho Park, Quang Van Duong, Yong-Ju Moon, Kanglyeol Ha, Seung Tae Choi,