2020
DOI: 10.1016/j.solidstatesciences.2020.106431
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A core-shell synthesis of CaCu3Ti4O12 (CCTO) ceramics showing colossal permittivity and low electric losses for application in capacitors

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Cited by 33 publications
(15 citation statements)
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“…A second circular arc and non-zero intercept with the real Z axis is observed in the high frequency region for the samples with x = 0 and x > 0, respectively. This behavior is similar to what is reported for CaCu 3 Ti 4 O 12 [32] and co-doped TiO 2 [2,13]. The arc at high frequency (/non zero intercept) is attributed to the response of the semiconductor component (grains), while the larger arc represents the response of electrically insulating component (grain-boundaries).…”
Section: Resultssupporting
confidence: 86%
“…A second circular arc and non-zero intercept with the real Z axis is observed in the high frequency region for the samples with x = 0 and x > 0, respectively. This behavior is similar to what is reported for CaCu 3 Ti 4 O 12 [32] and co-doped TiO 2 [2,13]. The arc at high frequency (/non zero intercept) is attributed to the response of the semiconductor component (grains), while the larger arc represents the response of electrically insulating component (grain-boundaries).…”
Section: Resultssupporting
confidence: 86%
“…This effect is based on Maxwell-Wagner polarization at the grain-grain-boundary interfaces due to the difference in their resistivities. According to the IBLC model, the effective dielectric constant is proportional to the grain size of the ceramic [29]. Hence the increase in ε with increasing sintering temperature is thought to be due to the increase in grain size as revealed by SEM observations.…”
Section: Resultsmentioning
confidence: 99%
“…The development of new synthesis methods for preparing nanoscale CaCu 3 Ti 4 O 12 is of great interest with the view of reducing the size of electronic elements, increasing their efficiency and productivity. Solid-phase synthesis is the most common method for preparing ССТО, like for most perovskites, due to its facility [4][5][6][7][8]. Along with calcium copper titanate, however, this synthesis can also yield copper(II) oxide, which fills-in intergrain spaces of the ceramics and influences the functional properties of the material.…”
Section: Introductionmentioning
confidence: 99%