Physical and electric properties of lead-free (Bi0.5Na0.5)TiO3-Ba(Zr0.04Ti0.96)O3 ceramics near the morphotropic phase boundary

Abstract

Extending the investigations on Bi-based solid solution for lead-free piezoelectric ceramics, this paper consider the complex solid-solution system (1-x)(Bi0.5Na0.5)TiO3-xBa(Zr0.04Ti0.96)O3 [(1-x)BNT-xBZT] for x < 0.12. High density polycrystalline ceramics were fabricated using conventional solid-state processing methods. These ceramics are then taken for structure and properties measurements.

Effect of Bi2O3 addition and sintering time on the physical and electrical properties of lead-free (Na0.5Bi0.5)TiO3-Ba(Zr0.04Ti0.96)O3 ceramics

“…According to the author's previous report, 9) the MPB of (1-x)NBT-xBZT system ceramic lies in the composition range of 0.05 ≤ x ≤ 0.07 at room temperature, where hexagonal and tetragonal phases coexist. The materials with perovskite structure are hexagonal phase at x ≤ 0.05 and become tetragonal phase at x ≥ 0.07.…”

“…The author 9) previously reported that 0.95(Na0.5Bi0.5)TiO3-0.05Ba(Zr0.04Ti0.96)O3 ceramics near the MPB has a good planar coupling factor (kp = 0.34). The author 9) reported that 0.99(Na0.5Bi0.5)TiO3-0.01Ba(Zr0.04Ti0.96)O3 ceramics exhibit a large anisotropy in the electromechanical coupling factor kt/kp (kt = 0.51, kp = 0.14) for high frequency electromechanical transducer applications. The comparison of properties of (Na0.5Bi0.5)TiO3 ceramics based on the previous reports of various groups are demonstrated in Table 1.…”

Electrical and Physical Properties of Lead-Free (Na_0.5K_0.5)NbO₃- Bi_0.5(Na_0.₉₃K_0.₀₇)_0.5TiO₃ Ceramics

“…Perovskite structure (Bi 1/2 Na 1/2 )TiO 3 [abbreviated as BNT] ceramics are considered as one of the candidates for lead-free piezoelectric ceramics because of its high ferroelectric properties and high Curie temperature (Tc = 320 o C). Some modifications of BNT ceramics have proved to be helpful by forming solid solution with other perovskite oxides [10][11]. Bi 0.5 (Na 0.93 K 0.07 ) 0.5 TiO 3 is well-known lead-free piezoelectric materials, which has a rhombohedral symmetry at room temperature and show better piezoelectric response.…”

Physical and Electrical Properties of Lead-Free (Bi_0.5Na_0.5)TiO₃-(Na_0.5K_0.5)NbO₃ Ceramics

“…Therefore BNT-based solid solution was studied to improve piezoelectric properties. Some modifications of BNT ceramic have proved to be helpful by forming solid solution with other perovskite oxides, [1][2][3][4][5][6][7] [4] (Bi 0.5 K 0.5 )TiO 3 , [5] (Sr 0.5 Ca 0.5 )TiO 3 , [6] and Ba(Ti 0.96 Zr 0.04 )TiO 3 [7] etc. A comparison of the properties of BNT ceramic based on the previous reports of various groups is shown in Table I.…”