Effect of V2O5 on sintering behaviour, microstructure and dielectric properties of textured Sr0.4Ba0.6Nb2O6 ceramics

Relationship between Crystal Structures and the Relaxor Property of SrBi2(Ta2–xVx)O9 Ceramics

“…The different aspect ratios of the SBTV ceramics were caused by the addition of V 2 O 5 because the low melting point of V 2 O 5 acts as a liquid-phase-sintering aid and promotes the growth of the (00 l ) planes. 17 However, the small voids or pores on the SrBi 2 Ta 1.6 V 0.4 O 9 ceramics were more apparent compared with those on the SrBi 2 (Ta 2– x V x )O 9 ( x = 0.1-0.3) ceramics presented in Figure 1a–c. This result is caused by the upright anisotropic plate-type grains that grow on the plane anisotropic plate-type SrBi 2 Ta 1.6 V 0.4 O 9 ceramics.…”

“…These differences in the microstructures of the SrBi 2 (Ta 1.7 V 0.3 )O 9 ceramics were observed due to the addition of V 2 O 5 because the low melting point of V 2 O 5 acts as a liquid-phase-sintering aid and causes rapid growth of the (00 l ) planes. 17 Zhang et al posited that SBT ceramics densify and shows the disklike grains after sintering at 1280 °C for 3 h. 21 By comparing the results presented in Figure 8d, it is evident that the addition of V 2 O 5 in SBT ceramics can lower the temperatures required to densify SBT-based ceramics.…”

“…By substituting Ta 2 O 5 with V 2 O 5 in SBT ceramics, SBTV ceramics could be formed and the ferroelectric properties were enhanced. 17 To study the effect of V 2 O 5 content and sintering temperature on the microstructure, Raman characteristic and normal- or relaxor-type characteristic of SBTV ceramics were investigated. The results of Perez et al, 18 Zhu et al, 19 and Yu et al 20 have indicated that Raman scattering is useful for exploring the microscopic origin of ferroelectric materials because it is a sensitive technique for investigating the lattice vibrational modes, which can indicate the changes in the lattice vibrations and positions occupied by the added ions.…”

Fabrication of textured Sr2Na0.9K0.1Nb5O15 ceramics: Anisotropy in structures and electrical properties

“…[12][13][14] During RTGG process, some critical factors can affect the final texture: morphology and size of anisotropic template particles, homogenous and fine-grained matrix powders, uniform contact and an epitaxial match between the matrix and template, and a mechanism for boundary migration. [15][16][17] According to JCPDS Cards # 34-0108 and # 34-0429, Sr 2 KNb 5 O 15 (SKN) has the same phase structure (tetragonal tungsten bronze structure) as SNN and the lattice parameter difference is less than 0.01 in both a and c directions at room temperature. So SKN is selected as template to prepare SNNbased textured ceramics by RTGG method.…”

Densification and texture evolution of Bi4Ti3O12 templated Na0.5Bi0.5TiO3–BaTiO3 ceramics: Effects of excess Bi2O3

“…An usual way was to add a few amount of sintering aids to promote the densification, and in some cases to achieve better epitaxial growth as well. According to the literature review, a few kinds of sintering aids were often chosen for different matrix compositions, for example, PbO, Bi 2 O 3 , CuO, Sb 2 O 3 and V 2 O 5 in Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 , NBT, (K 0.5 Na 0.5 )NbO 3 , (K 0.5 Na 0.5 )(Nb 0.97 Sb 0.03 )O 3 and Sr 0.4 Ba 0.6 Nb 2 O 6 , respectively [12][13][14][15][16]. These sintering aids could usually improve the densification by facilitating the mass transport, and simultaneously promote the evolution of the texture by enhancing the kinetics of template grain preferential growth [12,[14][15][16].…”