Structural, ferroelectric and piezoelectric properties of Mn-modified BiFeO3–BaTiO3 high-temperature ceramics

The Effect of Niobium Doping on the Electrical Properties of 0.4(Bi0.5K0.5)TiO3-0.6BiFeO3 Lead-Free Piezoelectric Ceramics

“…In order to improve the electrical properties, solid solutions of BiFeO 3 with other perovskites such as BaTiO 3 and PbTiO 3 have been studied [10,11,12]. The formation of solid solutions suppresses secondary phase formation and allows the creation of morphotropic phase boundaries (MPBs) between polymorphs of the perovskite phase, with a concomitant improvement in piezoelectric properties [13].…”

“…The x BaTiO 3 -(1− x )BiFeO 3 system has an MPB at x = 0.33 between rhombohedral and pseudocubic phases [14]. Compositions close to the MPB have good piezoelectric properties ( d 33 > 100 pC/N, bipolar strain of ~0.15% at an electric field of 6 kV/mm) and good temperature stability [10,12,14,15]. Matsuo et al studied the system x (K 0.5 Bi 0.5 )TiO 3 -(1− x )BiFeO 3 (KBT-BFO) and found it to have an MPB between rhombohedral and pseudocubic phases at x ≈ 0.4 [16].…”

“…Mn acts as an acceptor dopant substituting for Fe 3+ or Ti 4+ [10]. In addition to Mn, other dopants may be used to reduce the leakage current of x (K 0.5 Bi 0.5 )TiO 3 -(1− x )BiFeO 3 .…”

Enhancement in multiferroic and piezoelectric properties of BiFeO 3 –BaTiO 3 –Bi 0.5 Na 0.5 TiO 3 lead-free ceramics with MnO 2 addition by optimizing sintering temperature and dwell time

“…However, most of these studies on BiFeO 3 -BaTiO 3 focused on the dielectric and magnetic properties and rarely exhibit strong ferroelectricity and piezoelectricity because of the low resistivity and high loss tangent of the materials [19][20][21]. Recently, it has been reported that MnO 2 -added BiFeO 3 -BaTiO 3 ceramics exhibit considerable piezoelectric response and saturated ferroelectric polarization hysteresis [22][23][24]. However, there has almost no report on the simultaneous existence of good piezoelectric, ferroelectric and ferromagnetic properties in BiFeO 3 -bsed ceramics.…”

Comparative study of Mn3+ and Mn2+ doping effects on structure and electrical properties of BiFeO3 thin films

“…In order to decrease the leakage current and improve its electrical behavior, site engineering has been proposed and studied. Elements like Sm, Gd, Tb, Nd were introduced into A-site [11][12][13], and Mn, Co, Sc, Cr were used to replace B-site [14][15][16]. Among those ion substitutions, the film with Mn substitution exhibits a significantly reduced leakage current and an improved breakdown voltage, so that well-saturated ferroelectric hysteresis loops can be detected.…”