Figure 4 | Scientific Reports

Figure 4

From: Effects of multiple cations and sintering temperature on microstructure and dielectric properties in Na1/2Ln1/2Cu3Ti4O12 (Ln = Sm and Eu) ceramic materials

Figure 4

(a) Curves of mean grain size vs. sintering temperature for Na1/2Eu1/2Cu3Ti4O12 and Na1/2Sm1/2Cu3Ti4O12 ceramics. (b) Relationship between the atomic ratio of Cu+/Cu2+ or Ti3+/Ti4+ and sintering temperature for these samples. Solid dots and hollow dots in (b) correspond to the ratio of Ti3+/Ti4+ and the ratio of Cu+/Cu2+, respectively.

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