Fabrication and dielectric properties of Na0.5Bi0.5Cu3Ti4O12 from co-precipitation method

Na0.5Bi0.5Cu3Ti4O12 nanocrystalline powders prepared by a glycine–nitrate process: Preparation, characterization, and their dielectric properties

“…The overall XRD patterns of all the samples (P1-P6 powders) are very similar to that observed in literature for the NBCTO ceramics prepared by a conventional solid state reaction method [12,13]. Furthermore, the XRD patterns of the P1-P6 powders are also similar to those observed in NBCTO ceramics prepared by using a Pechini method [14], sol-gel method [15], and co-precipitation method [16]. As demonstrated in Fig.…”

“…Therefore, CCTO ceramic is believed to be a new promising dielectric material for capacitor applications. Recently, the dielectric properties of related oxides in the family of ACu 3 Ti 4 O 12 compounds, where A = Bi 2/3 [9], La 2/3 [9,10], Y 2/3 [9,11], Na 1/2 Bi 1/2 [12][13][14][15][16], Na 1/2 La 1/2 [17,18], and Na 1/2 Y 1/2 [19] have been widely studied. According to the first report on the study of the dielectric properties of these ACu 3 Ti 4 O 12 compounds [20], the e 0 values of ACu 3 Ti 4 O 12 ceramics were found to be considerably lower than 3600 at 100 kHz.…”

“…Low-temperature chemical reactions with short reaction times are usually sufficient to produce a pure phase [4,5] investigating synthesis of CCTO ceramics by chemical methods [3][4][5][6][7]21,22]. Unfortunately, synthesis of ACu 3 Ti 4 O 12 ceramic compounds via chemical routes have been rarely reported [14][15][16]18]. For the synthesis of CCTO ceramic powders, some chemical methods can effectively produce a CCTO phase by firing at temperature lower than 800°C with short reaction times such as pyrolysis of organic solutions [4], combustion method using ammonia as a fuel [5], and ethylenediaminetetraacetic acid (EDTA) precursor [21].…”

Synthesis, dielectric properties, and influences oxygen vacancies have on electrical properties of Na1/2Bi1/2Cu3Ti4O12 ceramics prepared by a urea combustion method

“…These XRD patterns are similar to the XRD pattern of the CaCu 3 Ti 4 O 12 structure (JCPDS 75-2188). The overall XRD patterns are similar to NBCTO ceramics prepared using a conventional solid-state reaction method [26] and other chemical solution methods such as a modified Pechini method [19], sol-gel method [24], combustion method using glycine as a fuel [22], and a co-precipitation method [30]. Unfortunately, a single phase of these NBCTO powders was not obtained using these chemical routes or it was not reported.…”

“…Although there have been an increasing number of reports about chemical preparation of ACu 3 Ti 4 O 12 ceramics, a single phase of the calcined powders was not successfully obtained [20,22,24,25,[29][30][31]. It is useful to develop a new method to produce a pure phase of ACu 3 Ti 4 O 12 powders and to increase the number of design options and to support a variety of applications in the future.…”