Microstructure and dielectric properties of Nd doped CaCu3Ti4O12 synthesized by sol–gel method
Source abstract
Abstract
Ca(1−3x/2)NdxCu3Ti4O12 (x = 0, 0.1, 0.2 and 0.3) powders and ceramics were prepared by sol–gel method. Effect of Nd on microstructure and dielectric properties were investigated. XRD patterns suggest that pure perovskite-like CCTO phase were obtained after calcining at 800 °C for 2 h. SEM pictures reveal that particle size monotonously decreases from 250 to 120 nm with increase of Nd concentration. The lattice parameters show an increasing trend with the enhancing amount of Nd3+ substitution. The average grain size of CCTO ceramics decrease from 2.0 to 0.8 μm with increase in Nd doping, which indicates that high concentration of Nd inhibits grain growth of CaCu3Ti4O12. Both of the dielectric constant and dielectric loss decrease with increase in Nd concentrations. Ca(1−3x/2)NdxCu3Ti4O12 ceramics with x = 0.3 shows the lowest dielectric constant of 1.12 × 104 as well as the lowest dielectric loss value of 0.12 at 20 °C(10 kHz).
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Dielectric properties of ceramics · Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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