کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9783058 1511868 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Seed effect in fabrication of calcium modified lead titanate ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Seed effect in fabrication of calcium modified lead titanate ceramics
چکیده انگلیسی
The calcium modified lead titanate [Pb0.76Ca0.24Ti0.96W0.02Co0.02O3 + MnO 0.4 wt.% + NiO 0.3 wt.% (PCaT)] bulk ceramics were fabricated. It was found that the ceramics with pure perovskite phase could be fabricated from a sol-gel powder that was annealed before being doped. The c/a ratios of the unit cell of un-doped PCaT powder and doped PCaT ceramics were 1.056 and 1.042, which were calculated according the X-ray diffraction patterns. The maximum value of piezoelectric constant d33, thickness electromechanical coupling coefficient kt, electromechanical quality factor Q and dielectric permittivity ɛ of the ceramics are 67 pC N−1, 0.52, 470 (at thickness resonance mode) and 200, respectively. The effect of powder fabrication procedure on crystalline phase purity and the function of doping element were discussed. The cause of large piezoelectric anisotropy was also investigated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 92, Issues 2–3, 15 August 2005, Pages 453-457
نویسندگان
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