Open AccessInfluence of CuO addition on dielectric and piezoelectric properties of (Bi0.5Na0.5)TiO3–BaTiO3lead-free piezoceramics
Author(s) -
Mauro Difeo,
Leandro Alfredo Ramajo,
Raz Muhammad
Publication year - 2021
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x2140004x
Subject(s) - materials science , dielectric , scanning electron microscope , raman spectroscopy , ferroelectricity , piezoelectricity , dielectric spectroscopy , doping , sintering , piezoelectric coefficient , analytical chemistry (journal) , ceramic , condensed matter physics , crystallography , composite material , optics , physics , quantum mechanics , electrode , electrochemistry , optoelectronics , chemistry , chromatography
Doping effects of CuO on the sintering behavior and electrical properties of 0.94([Formula: see text][Formula: see text]TiO 3 –0.06([Formula: see text]–[Formula: see text]CuO (BNT–BT6–[Formula: see text]Cu) lead-free piezoceramic obtained by the conventional solid-state reaction method were investigated. Regarding the undoped system, it is already known that it presents the best densification values when it is sintered at 1150[Formula: see text]C, however, the doped system was sintered at 1150[Formula: see text]C, 1100[Formula: see text]C, 1050[Formula: see text]C, 1025[Formula: see text]C, and 975[Formula: see text]C to determine the effect of Cu on the densification process. Therefore, it was obtained that the CuO-doped samples sintered at 1050[Formula: see text]C presented the highest density values and therefore were the ones chosen to perform the characterization tests together with the undoped system. The samples were characterized using X-ray diffraction (XRD), Raman microspectroscopy, and scanning electron microscopy (SEM) analysis, whereas the ferroelectric and dielectric properties were evaluated by means of ferroelectric hysteresis loops and impedance spectroscopy studies. As a result, the addition of CuO allowed an improvement in sinterability and densification, with the subsequent grain growth, and the improvement of the piezoelectric coefficient ([Formula: see text].