Abstract

Lead free solid solution Bi_0.5(Na_0.68K_0.22Li_0.10)_0.5TiO₃-xmol%Bi₂FeCrO₆ (BNKLT-xBFCO), with x = 0, 0.004, 0.007, 0.013 and 0.019, ceramics were calcined at 750 °C and sintered at 1150 °C for 2 h using the solid state combustion technique. The effect of the x content on the phase formation, microstructure, electric and magnetic properties of the produced ceramics were investigated. All samples exhibited a pure perovskite phase with the co-existence of rhombohedral and tetragonal phases. The doping of BFCO enhanced the density and dielectric properties of the BNKLT ceramics. The BNKLT-0.013BFCO ceramics showed the highest density (5.87 g/cm³), excellent dielectric properties (ε_R∼1390, tan δ_R∼0.039, ε_m ∼4986 and tan δ_m∼0.075) and the highest piezoelectric constant (d₃₃∼194 pC/N). The sample with x = 0 showed diamagnetic behavior, while the samples with 0.004-0.019 content exhibited paramagnetic behavior with higher magnetization at higher x content.

摘要

无铅固溶体Bi _0.5（Na _0.68 K _0.22 Li _0.10）_0.5 TiO ₃ -xmol％Bi ₂ FeCrO ₆（BNKLT-xBFCO），x = 0、0.004、0.007、0.013和0.019时，使用固态燃烧技术在750°C下煅烧陶瓷，并在1150°C下烧结2 h。研究了x含量对所生产陶瓷的相形成，微观结构，电和磁性能的影响。所有样品均显示纯钙钛矿相，菱面体相和四方体相并存。BFCO的掺杂增强了BNKLT陶瓷的密度和介电性能。所述BNKLT-0.013BFCO陶瓷表现出最高的密度（5.87克/厘米³），优良的介电性能（ε _{- [R} ~1390，黄褐色δ _ř ~0.039，ε_米~4986和黄褐色δ_米~0.075）和最高的压电常数（ d ₃₃约194 pC / N）。x  = 0的样品显示出反磁性行为，而含量为0.004-0.019的样品则显示出在x含量更高时具有较高磁化强度的顺磁行为。