کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7885748 | 1509784 | 2018 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of post-annealing on electrical properties of CuF2·xH2O-doped KNN ceramics for rotary-linear ultrasonic motors
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effects of post-annealing on electrical properties of CuF2·xH2O-doped KNN ceramics for rotary-linear ultrasonic motors Effects of post-annealing on electrical properties of CuF2·xH2O-doped KNN ceramics for rotary-linear ultrasonic motors](/preview/png/7885748.png)
چکیده انگلیسی
Lead-free (K0.5Na0.5)NbO3 (KNN) ceramics were prepared using a novel sintering aid (CuF2·xH2O (xâ2)) to investigate the effects of post-annealing temperature and atmosphere on oxygen vacancies, microstructure, and electrical properties. Post-annealing (K0.5Na0.5)NbO3 +â1.5âmol% CuF2·xH2O (KNNCH) ceramics at 800â°C under argon was shown to increase the bulk relative density to 97% through the formation of a homogeneous microstructure with liquid phase. The resulting samples presented the following excellent piezoelectric properties: kpï¼34.1% (±2%); ktï¼45.3% (±2%); Qmï¼3170 (±2%); Rzï¼8.6âΩ (±3%); and tanδï¼0.1%. Our results clearly demonstrate that annealing under argon can produce oxygen vacancies in ceramics, which has a significant influence on the stability of domain structures of the samples. Piezoelectric motors fabricated using these ceramics achieved a velocity of 4.5âmm/s, vertical velocity of 3.02â·mm/s, and output power of 2.93âmW with a negligible increase in temperature and high stability while driven.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 14, 1 October 2018, Pages 16173-16180
Journal: Ceramics International - Volume 44, Issue 14, 1 October 2018, Pages 16173-16180
نویسندگان
Chung-Ming Weng, Cheng-Che Tsai, Cheng-Shong Hong, Chung-Hao Chiang, Sheng-Yuan Chu, Chun-Cheng Lin, Jyh Sheen,