Microstructural, Mechanical and Dielectric Properties of CCTO/Epoxy Composite

Abstract:

An attempt has been made to investigate the relationship between different composition of CaCu₃Ti₄O₁₂ (CCTO)/epoxy to the microstructural, dielectric and mechanical properties respectively. CCTO powder had been produced through solid state reaction method using CaCO₃, CuO and TiO₂ as the raw materials. They were mixed at stoichiometric ratio and calcined at 1040°C for 10 hours. CCTO powder mixed with epoxy and hardener at different weight percentage (10, 20, 30, 40 and 50 wt%). Microstructure of fracture surface of the composite had been studied using Field Emission Scanning Electron Microscopy (FESEM) and mechanical characterization had been conducted using Universal Testing Machine (UTM). LCR meter Agilent 4284A was used to measure the dielectric properties at 20 Hz to 1 MHz. Increasing CCTO concentration to the composite caused a significant change of dielectric constant which arised from 17.1 to 23.5 at 1 kHz. This arising due to higher concentration of CCTO filler transfer more intrinsic values to the composite. Tensile test shows an increment to stress value from 4 to 17 MPa as the respond on increasing of ceramic filler concentration. High stiffness of CCTO have increased the strength of the composite. The dispersion of higher weight percentage of the CCTO into the epoxy is more compacted than the dispersion of lower weight percentage of CCTO. It is best to mix the higher amount of filler into the polymer matrix to increase the dielectric and strength of the composite material.

• Periodical: Solid State Phenomena (Volume 264)
• Pages: 206-210
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.264.206
• Online since: September 2017
• Authors: Saniah Abdul Karim, Muhammad Azwadi Sulaiman*, Mohamad Najmi Masri, Julie Juliewatty Mohamed, Zainal Arifin Ahmad, Mohd Fadzil Ain
• Keywords: CCTO/Epoxy Composite, Mechanical Properties, Microstructural

References

[1] M. A. Sulaiman, S. D. Hutagalung, M. F. Ain, Z. A. Ahmad, Dielectric properties of Nb-doped CaCu3Ti4O12 electroceramics measured at high frequencies, J. Alloys Compd. 493 (2010) 486–492.

DOI: 10.1016/j.jallcom.2009.12.137

[2] W. Li, H. Cai, J. Zheng, Characterization of strength of carbon fiber reinforced polymer composite based on micromechanics, Acta Mater. Compos. Sin. 30 (2013) 105–117.

[3] A. Mohanty, V. K. Srivastava, Dielectric breakdown performance of alumina/epoxy resin nanocomposites under high voltage application, Mater. Des. 47 (2013) 711–716.

DOI: 10.1016/j.matdes.2012.12.052

[4] W. Yang, S. Yu, R. Sun, R. Du, Effects of BaTiO3 and FeAlSi as fillers on the magnetic, dielectric and microwave absorption characteristics of the epoxy-based composites, Ceram. Int. 38 (2012) 3553–3562.

DOI: 10.1016/j.ceramint.2011.12.071

[5] D. H. Kuo, C. C. Chang, T. Y. Su, W. K. Wang, B. Y. Lin, Dielectric properties of three ceramic/epoxy composites, Mater. Chem. Phys. 85 (2004) 201–206.

DOI: 10.1016/j.matchemphys.2004.01.003

[6] F. Amaral, C. P. L. Rubinger, F. Henry, L. C. Costa, M. A. Valente, A. Barros-Timmons, Dielectric properties of polystyrene-CCTO composite, J. Non. Cryst. Solids. 354 (2008) 5321–5322.

DOI: 10.1016/j.jnoncrysol.2008.05.056

[7] P. Thomas, K. T. Varughese, K. Dwarakanath, K. B. R. Varma, Dielectric properties of Poly(vinylidene fluoride)/CaCu3Ti4O12 composites, Compos. Sci. Technol. 70 (2010) 539–545.

DOI: 10.1016/j.compscitech.2009.12.014

[8] L. Seveyrat, A. Chalkha, D. Guyomar, L. Lebrun, Preparation of graphene nanoflakes / polymer composites and their performances for actuation and energy harvesting applications Preparation of graphene nanoflakes / polymer composites and their performances for actuation and energy harvesting applications, 104904 (2012).

DOI: 10.1063/1.4718577

[9] S. Jin, H. Xia, Y. Zhang, Effect of La-doping on the properties of CaCu3Ti4O12 dielectric ceramics, Ceram. Int. 35 (2009) 309–313.

DOI: 10.1016/j.ceramint.2007.10.007

[10] S. -W. Choi, S. -H. Hong, Y. -M. Kim, Effect of Al Doping on the Electric and Dielectric Properties of CaCu3Ti4O12, J. Am. Ceram. Soc. 4011 (2007) 070922001308001.

[11] M. A. Sulaiman, S. D. Hutagalung, Z. A. Ahmad, Nanoscale Investigation of Nb-Doped Cacu3Ti4O12 Grains, Adv. Mater. Res. 364 (2011) 455–459.

[12] M. N. Masri, Z. M. Yunus, A. R. M. Warikh, A. A. Mohamad, Electrical conductivity and corrosion protection properties of conductive paint coatings, Anti-Corrosion Methods Mater. 57 (2010) 204–208.

DOI: 10.1108/00035591011058219

[13] F. Qin, C. Brosseau, A review and analysis of microwave absorption in polymer composites filled with carbonaceous particles, Applied Physics Reviews. 61301 (2012).

DOI: 10.1063/1.3688435

[14] M. A. Sharif, H. Sueyoshi, Fabrication and microstructural investigations of porous ceramic particle/polymer matrix composites, Mater. Sci. Technol. 24 (2008) 85–89.

DOI: 10.1179/174328407x241098

[15] Y. Bai, Z. Y. Cheng, V. Bharti, H. S. Xu, Q. M. Zhang, High dielectric constant ceramic powder polymer composites. Appl. Phys. Lett. 76 (2000) 3804-3806.

DOI: 10.1063/1.126787

[16] V. Suchaiya, D. A. Ong, Microwave-assisted modification of cellulose as a compatibilizer for PLA and MCC biocomposite film: Effects of side chain length and content on mechanical and thermal properties, Polym. Polym. Compos. 22 (2014) 613–624.

DOI: 10.1177/096739111402200705