Structural analysis of BaMg1/3(Ta,Nb)2/3O3 ceramics

Structure and optical properties of Sn4+ doped Ba(Mg1/3Nb2/3)O3 transparent ceramics

“…1 correspond to the superlattice reflections that are generated by planes whose indices are (2hþ kþ l)a3n [10]. The ordering degree can be calculated quantitatively by the B-site ordering parameter (S), which can be deduced from the ratio of the X-ray intensities of the diffraction peaks associated with cation ordering [16,17].…”

“…It is known that BMN exists in both ordered and disordered forms, with hexagonal and cubic symmetry, respectively [10]. It is notoriously difficult to obtain a completely ordered or disordered structure in BMN.…”

Fabrication and Evaluation of Mn-Substituted Ba(Cu1/3Nb2/3)O3Ceramics

“…Bi-base ferroelectric and piezoelectric materials, including BiFeO 3 [BFO] and (Bi,Na)TiO 3 [BNT], are dominant candidates, for Pb-based materials as large spontaneous polarization and piezoelectric constant are reported for these materials. However, most of Bi-based materials exhibit poor insulating property essentially due to volatile Bi element that degrade the performance of these materials [1][2].…”

“…Among several alternative materials for PZT, we focus on the solid-solution system of Ba(Cu 1/3 Nb 2/3 )O 3 (BCN, tetragonal)-Ba(Mg 1/3 Nb 2/3 )O 3 (BMN, pseudo-cubic [3]) because it possesses similar structure to PbTiO 3 -PbZrO 3 . BCN had tetragonal crystal system with its lattice parameters of a = 0.40464(4) and c = 0.41807(4) nm (c/a = 1.033).…”

“…In this report, Mn-substitution was attempted for improving the insulating property of the BCN ceramics, as usually applied to other perovskite-based materials, e.g., BiFeO 3 [BFO], (Ba,Sr)TiO 3 [BST], PZT [5][6]. We fabricated Mn-substituted Ba(Cu 1/3 Nb 2/3 )O 3 (Mn-BCN) ceramics for reducing the leakage current through this material.…”