Effect of TiO 2 as Filler in NaCl: Possible Applications in Ionic Storage Systems

• Published in: Journal of physics. Conference series Vol. 2267; no. 1; p. 12092
• Main Authors: Kour, Simrandeep, Mukherjee, Rupam
• Format: Journal Article
• Language: English
• Published: 01.05.2022
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/2267/1/012092

Abstract High dielectric capacitors are increasingly used for energy storage in sustainable nanotechnologies. Here, we observed large enhancement of dielectric constant by 3 order at frequency 1kHz with moderate loss when TiO 2 is added as a filler in NaCl bulk matrix. The TiO 2 nanoparticles are synthesized via sol gel process and is subsequently added in varying weight percentage x in the ionic matrix of NaCl, which is represented as TiO 2(x) NaCl. The parameters like dielectric constant, dissipation Loss and ac conductivity are measured with varying fraction of TiO 2 in frequency range less than 25 KHz. The steady increase of dielectric constant with increasing filler content at low frequency indicates percolation type behavior which accounts for the first dielectric peak at x= 50. The dielectric loss is found to be around 1 for x< 45 whereas it tends to increases with higher filler fraction. Moreover, the frequency dependent polarization in this composite system also accounts for hopping type behavior of mobile charge carriers contributed by TiO 2 as confirmed from ac conductivity measurement. Further, the samples are characterized by X-ray diffraction and Field emission scanning electron microscopy in order to study the structure and morphology of the samples. Overall, TiO 2 incorporation strongly improves the dielectric behavior of the ionic matrix at low frequency, making it suitable for super dielectric material (SDM).