A comparative study on dielectric, structure, and thermal behavior of micro‐ and nano‐sized CCTO in nylon 6,9 matrix

Calcium copper titanium oxalate CaCu₃Ti₄O₁₂ (CCTO) particles as a filler with both micro‐ and nano‐sized into nylon 6,9 polymer have been investigated under structural, thermal, and dielectric properties to find that particle satisfy all the same. Micro‐sized CCTO particles (point out as mCCTO) was synthesized using solid‐state route using ball milling and nano‐sized CCTO particles (point out as nCCTO) was synthesized using complex oxalate precursor route. Fabrication of nylon 6,9/CCTO composite for both micro‐ and nano‐sized CCTO particles were employed separately into nylon 6,9 matrix and examined comparatively. The composite containing 20 vol% of nCCTO achieve 24.5 dielectric permittivity at 100 Hz in room temperature that was significantly higher than mCCTO which was 14 at the same condition. From the structural analysis, we obtained that the nCCTO was well dispersed in the matrix medium, whereas the mCCTO were also dispersed with some agglomeration that was the reason for the interaction failure between the particles and matrix material. The dielectric permittivity results obtained from this study specify that the composite containing nano‐sized CCTO particles may be suitable for energy storage devices and in the higher temperature sensor applications. POLYM. COMPOS., 38:927–935, 2017. © 2015 Society of Plastics Engineers