کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1460953 989611 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fabrication and electrical properties of porous BS–0.64PT high temperature piezoceramics using polystyrene microsphere
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Fabrication and electrical properties of porous BS–0.64PT high temperature piezoceramics using polystyrene microsphere
چکیده انگلیسی

Porous BiScO3–0.64PbTiO3 (BS–0.64PT) ceramics were fabricated by using burnable plastic sphere technique (BURPS). Self-synthesized polystyrene microsphere (PS, φ360 nm) was used as pore forming agent (PFA). Porosity of the porous ceramics was regulated by adjusting sintering temperature and volume fraction of PFA. The porous ceramics were characterized by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). All samples were pure tetragonal perovskite. Properties of the porous ceramics, including porosity, piezoelectric coefficient (d33) and dielectric properties (Ɛr) were measured. Electromechanical coupling coefficients (kp, kt, k31), mechanical quality factor (Qm), piezoelectric coefficient (d31, dh), hydrostatic voltage coefficient (gh), acoustic impedance (Z), hydrostatic figure of merit (HFOM) were derived from impedance spectrum. Sintering temperature and volume fraction of PFA were optimized to bring out porous ceramics with highest gh and HFOM. Porous ceramic with 50 vol% PS microspheres sintered at 1000 °C possessed porosity of 17.12%, with gh and HFOM to be 0.024 V/m Pa and 6087×10−15/Pa, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 41, Supplement 1, July 2015, Pages S414–S420
نویسندگان
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