کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7886821 | 1509789 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stable dielectric properties of Na1+xBiTi6O14+0.5x (xâ¯=â¯â0.02, ââ¯0.01, 0.01, 0.02) ceramics with low loss and high operating temperature
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
New lead-free dielectric ceramics, Na1+xBiTi6O14+0.5x (xâ¯=â¯â0.02, ââ¯0.01, 0.01, 0.02), were prepared by the conventional solid-state method. Micro-structural and electrical properties of Na1+xBiTi6O14+0.5x were studied. XRD showed all the samples exhibited a single structured phase. Grains decreased at the beginning, then grew with the increasing x content in SEM. Impedance spectra (IS) analysis evidenced the phenomena that the dielectric permittivity increased firstly, then decreased, while the loss had the opposite trend. Z* plots showed that Na1+xBiTi6O14+0.5x ceramics were a kind of dielectrics. The activation energy (Ea) could be calculated in the range of 1.53-1.65â¯eV, which indicated they were dielectric ceramics. Na1+xBiTi6O14+0.5x ceramics (xâ¯=â¯0.01) sintered at 1040â¯Â°C showed prominent dielectric properties with a dielectric constant of 25.76, loss of 0.07%, Ea of 1.65â¯eV, density of 3.463â¯g/cm3, impedance of 0.532â¯MΩâ¯cm, -Zâ²â²max of 0.1958â¯MΩâ¯cm, capacitance of 5.56â¯pF/cm (600â¯â), which were enhanced much compared with other samples. The existence of dielectric properties with high dielectric constant, low dielectric loss and wide operating temperature range makes it possible to develop the ceramics into high-temperature capacitors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 9, 15 June 2018, Pages 10021-10027
Journal: Ceramics International - Volume 44, Issue 9, 15 June 2018, Pages 10021-10027
نویسندگان
Yong Chen, Qi Chen, Lu Qin, Chaobin Jiang, Qian Luo, Cancan Zhang, Wanqiang Cao, Ruikun Pan, Wei Wang,