Dielectric properties, microstructure and diffuse transition of Ni-doped Ba(Zr0.2Ti0.8)O3 ceramics

Dielectric and tunable properties of Zr doped BST ceramics prepared by spark plasma sintering

“…Due to the inhomogeneous distribution of Zr ions on the Ti sites and the mechanical stress in the grain, the BaZr 0.2 Ti 0.8 O 3 bulk ceramics show a broad dielectric constant-temperature curve. At room temperature, the BaZr 0.2 Ti 0.8 O 3 ceramics is sensitive to the electric field and show high tunability as over 80% (at electric field of 2 kV/mm) [19][20][21][22][23]. Thus Zr doped BST ceramics exhibited higher tunability, less dielectric loss than pure BST ceramics.…”

Relaxor behavior in (Ba1−3/2Bi )(Zr Ti1−)O3 ceramics

“…In particular, there is a renewed interest in the environmental friendly lead-free perovskite Ba(Zr y Ti 1Ày )O 3 (BZT) as a substitute for Ba 1Àx Sr x TiO 3 (BST) in these applications due to its high dielectric constant value combined with relatively low dissipation and large voltage tunability of the dielectric constant, as well as a good chemical stability [4][5][6]. Depending on the Zr content, this material can exhibit either a normal ferroelectric or relaxor www.elsevier.com/locate/ceramint behavior [7][8][9][10][11][12][13]. The relaxor state is characterized by a strong dispersion of the dielectric constant for temperatures below the maximum permittivity temperature T m , by a shift of T m towards higher values when the frequency is increased and by a deviation from the Curie-Weiss law in the paraelectric phase around T m [12].…”

Structure and optical properties of [Ba1–xY2x/3](Zr0.25Ti0.75)O3 powders

“…In fact, the researches with this perovskite [16e18] have been mainly focused on the dielectric properties as well as on the phase transition from ferroelectric to relaxor. In this case, in order to improve the electrical properties, the BZT ceramics have been doped with different lanthanides, semi-metal and alkaline-earth metals, such as: niobium [19], boron [20,21], lithium [17], yttrium [22], copper [23], vanadium [24], tungsten [25], manganese [26], nickel [27], aluminium [28], bismuth [23,29], lanthanum [30], cerium [31], samariumeeuropiumedysprosium [32], erbium [33] and ytterbium [34].…”