چکیده مقاله
In this study, barium titanate BaTiO₃ doped with varying concentrations of niobium Nb was synthesized via mechanical alloying The precursor powders were precisely weighed and milled using a SPEX 8000 device, followed by compaction and sintering at 1500 °C Structural and morphological characterizations were performed using FT IR, SEM/EDS, and Zetasizer analysis The FT IR spectrum of the uncalcined sample revealed characteristic absorption bands for O–H vibrations, carbonate groups, and a strong Ti–O bond, confirming the formation of the titanate framework SEM images showed agglomerated particles alongside nanoscale grains, with Zetasizer results indicating an average particle size of 35 ± 5 nm Dielectric properties were evaluated using an LCR meter across a frequency range of 20 Hz to 10 MHz Among the Nb doped samples, the composition containing 0 3 wt% Nb S 0 3Nb exhibited the highest dielectric constant ~17,000 at 20 Hz , suggesting optimal doping for enhanced electrical performance Microstructural analysis of S 0 3Nb revealed two distinct phases with uniform Nb dispersion and spherical morphology The slight increase in particle size compared to undoped BT was attributed to the larger ionic radius of Nb⁵⁺
کلیدواژهها
نویسندگان
Milad Kazemi
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran
شیوه ارجاع
Kazemi, Milad,1404,Investigation of morphological and dielectric properties of barium titanate with niobium,26th National Conference on Electrical, Computer and Mechanical Engineering,Shirvan
ارائهشده در
مجموعه مقالات بیست و ششمین کنفرانس ملی مهندسی برق،کامپیوتر و مکانیک20 خرداد 1404 · شیروان