2022
DOI: 10.1111/jace.18779
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Crystal structure, dielectric properties, and optical bandgap control in KNbO3–BiMnO3 ceramics

Abstract: 1 − x)KNbO 3 -xBiMnO 3 (0 ≤ x ≤ 0.25) ceramics were prepared by the solid-state reaction method. An X-ray diffraction analysis combined with Raman spectroscopy showed the co-solubility of Bi and Mn in the orthorhombic structure to be less than 5% BiMnO 3 . Orthorhombic and pseudocubic symmetries coexist in the 0.05 ≤ x ≤ 0.15 region, coinciding with a bimodal grain size distribution. This coexistence of crystal symmetries is further corroborated by several anomalies in the dielectric behavior, which can be asc… Show more

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