�ber eine Pr�zisionsbestimmung der Gitterkonstanten von Silber nach dem R�ckstrahlverfahren

Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition

“…1e, in agreement with previously reported data [42]. In this figure, it has also been indicated the peak at around 38.2 degrees (#) which corresponds to the (111) diffraction plane of Ag [43]. The presence of only Ca 3 Co 4 O 9 phase and Ag in the final samples is a good indication that the twosteps sintering process has been successful, taking into account that the first temperature (1200 ºC) is higher than the Ca 3 Co 4 O 9 phase maximum stability temperature (around 925 ºC) [39], producing the Ca 3 Co 4 O 9 decomposition into CaO(CoO) and CoO(CaO) solid solutions [40].…”

Effect of Ag additions on the Bi_1.6Pb_0.4Sr₂Co_1.8O_x thermoelectric properties

“…Peaks marked with a  in the plot correspond to the Co-free Bi 0.75 Sr 0.25 O 1.375 secondary phase [34], and the * indicates the (111) peak of Si, used for reference. Moreover, for the samples with 1 and 3wt.% Ag, a new peak appears in the XRD plots at around 38 degrees, which corresponds to the metallic Ag (111) plane (indicated by ) [35]. This peak also indicates that Ag does not react with the thermoelectric ceramic, leading to those obtained on single crystals mainly due to the electrical resistivity decrease.…”

Improvement of textured Bi1.6Pb0.4Sr2Co1.8O thermoelectric performances by metallic Ag additions

“…Peaks marked with a • in the plot correspond to the Co-free Bi 0.75 Sr 0.25 O 1.375 secondary phase [29]. Moreover, for samples with 1 and 3wt.% Ag, a new peak appears in the XRD plots at around 38 degrees, which corresponds to the metallic Ag (111) plane (indicated by ) [30]. This peak also indicates that Ag does not react with the thermoelectric ceramic, leading to the formation of a ceramic matrix composite with metallic particles distributed inside the matrix, as observed in similar ceramic systems [18,27,31].…”