Bi0.5(Na0.68K0.22Li0.10)0.5Ti1–xCoxO3 lead-free perovskite ceramics (BNKLT–xCo, x = 0, 0.005, 0.010, 0.015 and 0.020) were fabric-ated via the solid-state combustion technique. A small-amount of Co2+ ion substitution into Ti-sites led to modification of the phase formation, microstructure, electrical and magnetic properties of BNKLT ceramics. Coexisting rhombohedral and tetragonal phases were observed in all samples using the X-ray diffraction (XRD) technique. The Rietveld refinement revealed that the rhombohedral phase increased from 39％ to 88％ when x increased from 0 to 0.020. The average grain size increased when x increased. With increasing x, more oxygen vacancies were generated, leading to asymmetry in the bipolar strain (S–E) hysteresis loops. For the composition of x = 0.010, a high dielectric constant (εm) of 5384 and a large strain (Smax) of 0.23％ with the normalized strain(d?33)of 460 pm·V–1 were achieved. The BNKLT–0Co ceramic showed dia-magnetic behavior but all of the BNKLT–xCo ceramics exhibited paramagnetic behavior, measured at 50 K.

Pamornnarumol Bhupaijit;Chonnarong Kaewsai;Tawat Suriwong;Supree Pinitsoontorn;Surirat Yotthuan;Naratip Vittayakorn;Theerachai Bongkarn

Department of Physics,Faculty of Science,Naresuan University,Phitsanulok 65000,Thailand;School of Renewable Energy and Smart Grid Technology,Naresuan University,Phitsanulok 65000,Thailand;Research Center for Academic Excellence in Applied Physics,Faculty of Science,Naresuan University,Phitsanulok 65000,Thailand;Institute of Nanomaterials Research and Innovation for Energy(IN-RIE),Khon Kaen University,Khon Kaen 40002,Thailand;Department of Chemistry,School of Science,King Mongkut's Institute of Technology Ladkrabang,Bangkok 10520,Thailand

矿物冶金与材料学报

[1]Pamornnarumol Bhupaijit;Chonnarong Kaewsai;Tawat Suriwong;Supree Pinitsoontorn;Surirat Yotthuan;Naratip Vittayakorn;Theerachai Bongkarn-.Effect of Co2+ substitution in B-sites of the perovskite system on the phase formation, microstructure, electrical and magnetic properties ofBi0.5(Na0.68K0.22Li0.10)0.5TiO3 ceramics)[J].矿物冶金与材料学报,2022(09):1798-1808

ofBi0,68K0,22Li0,xCoxO3,BNKLT,xCo,0Co

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