Preparation and characterisation of Pb(Zr0.52Ti0.48)0.975Nb0.025O3 ceramics

The sintering temperature-induced transition from relaxor to ferroelectric in 0.7PbFe2/3W1/3O3–0.3PbTiO3 ceramics

“…In Table 1, both the γ(ξ) and the σ(Δ) values are smaller as increasing the sintering temperature, the results clearly show that the 0.7PFW-0.3PT relaxors transfer the dielectric characteristic form the more complete DPT to the normal ferroelectric properties as the sintering temperature increase. These results can be well explained by the DPT theory [3][4][5][6][7]15,[25][26][27][28][29]. A reasonable explanation is that the transfer from the heterogenous to the homogeneous occurs in the micro region due to the composition fluctuation as the sintering temperature increases.…”

“…(2). γ value and ξ value is in the range between 1 and 2, the dielectric material is the normal ferroelectric characteristic as the γ(ξ) value near 1 and is the total DPT relaxor characteristic as the γ(ξ) value near 2 [3][4][5]15,[25][26][27][28][29]. σ(Δ) represent the diffusive extension and the diffusion characteristic is more obvious as the σ(Δ) is larger [3][4][5]15,[25][26][27][28][29].…”

Investigation of the dielectric properties of MnO-additive Pb(Fe2/3W1/3)–PbTiO3 relaxors prepared by two different methods

“…The empirical laws are individually proposed by Burfoot et al and Eiras et al who modify the Smolensky's equation according to the experimental results [48,49]. Until now, several researches still adapt these empirical laws to successfully discuss the DPT phenomenon of the relaxor [13,27,43,[48][49][50][51][52]. Recently, authors show that the fitting curves are the same between them and Eiras et al's law provides better physical and mathematical picture [24,25].…”

“…It shows the normal ferroelectric characteristic as the ξ value nears 1 and shows the total DPT relaxor characteristic as the ξ value nears 2. Δ represents the diffusive extension and the diffusion characteristic is more obvious as Δ value is larger [13,24,25,27,43,[48][49][50][51][52]. For 0.25PTMn ceramics (see Fig.…”

The dependence of the synthesis condition on the dielectric behaviors of the 0.75Pb(Fe2/3W1/3)O3–0.25PbTiO3 based ceramics

“…dielectric picture [13,[23][24][25][26][27][28][38][39][40][41]. As changing the synthesized method to the IS method (0.2 + 0.3PTMn and 0.1 + 0.4PTMn samples), the broad-peak dielectric constant will be sharper, which represents that the LRO ferroelectric characteristic is obvious [13,[23][24][25][26][27][28][38][39][40][41]. It is worthy of noting that the 0.1 + 0.4PTMn ceramics have the sharper peak dielectric behavior compared with the 0.2 + 0.3PTMn ceramics.…”