Abstract

The (1 − x) Bi (Fe_0.9Al_0.05Yb_0.05) O₃–xBaTiO₃ (BFAYO-x BTO) ceramics were synthesized by microwave sintering (MWS) and conventional sintering (CS) methods. The crystal structure, surface morphology, dielectric and ferroelectric properties were investigated. XRD patterns show that BTO tetragonal and BFO rhombohedral phases coexist in both MWS and CS samples, and that the diffraction peaks of MWS samples shift to lower angles due to the larger ionic radius of Ba²⁺ compared with Bi³⁺. The lattice constant of BFAYO-x BTO ceramics increases with the increase of BTO content. It was found that the average grain size of the MWS ceramic is much smaller than that of the CS ceramic. Dielectric measurements reveal that the dielectric loss and dielectric constant increase with BTO content increasing. The introduction of BTO into BFAYO-based ceramic contribute to the enhancement of the dielectric relaxation behavior. The P–E hysteresis loops demonstrate that the remnant polarization (P_r) and the coercive field (E_C) of the MWS samples are smaller than those of the CS samples. P_r and E_C first increase, then decrease and then increase again with the increase of BTO content. The maximum and minimum values of the remnant polarization were obtained at x = 0.25 and 0.3, respectively.

中文翻译：

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烧结方法和BaTiO 3掺杂对Bi（Fe 0.9 Al 0.05 Yb 0.05）O 3基陶瓷微观结构和电学性能的影响。

摘要

所述（1 -  X）铋（铁_0.9的Al _0.05镱_0.05）O ₃ - X的BaTiO ₃（BFAYO- X BTO）陶瓷用微波烧结（MWS）和常规烧结（CS）的方法合成。研究了晶体结构，表面形态，介电和铁电性能。XRD图谱表明，BWS四方相和BFO菱面体相共存于MWS和CS样品中，并且由于Ba ^2+的离子半径大于Bi ³⁺，MWS样品的衍射峰移至较低的角度。BFAYO- x的晶格常数BTO陶瓷随着BTO含量的增加而增加。已经发现，MWS陶瓷的平均晶粒尺寸远小于CS陶瓷的平均晶粒尺寸。介电测量表明，介电损耗和介电常数随BTO含量的增加而增加。将BTO引入基于BFAYO的陶瓷中有助于增强介电弛豫性能。该P - ë磁滞回线表明，剩余极化（P _{- [R} ）和矫顽场（Ë _ç的MWS样品的）比对CS样品的小。P _r和E _C首先增加，然后减少，然后随着BTO含量的增加再次增加。剩余极化的最大值和最小值分别在x  = 0.25和0.3处获得。