TITLE:
HAP/f-MWCNTs/Cobalt Ferrites Nano Composites Synthesis and Electrical and Magnetic Performance Investigation
AUTHORS:
Mohammad Mostafa Raja, Rabiul Awal, Jahirul Islam Khandaker, Mohammad Al-Mamun, Mohammad Mahbubul Haque, Nilufer Yesmin Tanisa, Mohammad Sheikh Farid, Sayed Muhammad Shahid Hasan, Shamima Meherin
KEYWORDS:
Hydroxyapatite (HAP), Multiwalled Carbon Nanotubes (MWCNTs), Ferrites, Dielectric Constant, and Resistivity
JOURNAL NAME:
Open Access Library Journal,
Vol.10 No.3,
March
31,
2023
ABSTRACT: In the current study, pristine multiwalled carbon nanotubes (p-MWCNTs) were functionalized by HNO3 for introducing carboxyl functional group on the MWCNTs surface by which hydroxyapatite (HAP) molecules were grafted onto the surface of functionalized multiwalled carbon nanotubes (f-MWCNTs) with strong interfacial bonding. HAP-fMWCNTs-Cobalt ferrite composites were synthesized successfully by the homogenous mixture method. XRD analysis revealed that crystalline peaks of the HAP-f-MWCNTs-Cobalt ferrite composites were sharper than that of the pure HAP, f-MWCNTs, and cobalt ferrite which indicated that crystalline phases of HAP and cobalt ferrite on f-MWCNTs sidewall possessed high crystallinity. FTIR spectra of the composites sintered at 800°C confirmed the f-MWCNTs and ferrite along with HAP. But dielectric constant was decreased with increasing frequency. The dielectric constant depended upon the polarizability of the materials. The dielectric loss factor of the composites at the beginning was very high but started to decrease immediately with increasing frequency. VSM data identified that HAP/3% f-MWCNTs/5CoFe2O4 composite was a highly magnetic material as it processed the highest coercivity of 850.50 Oe with magnetization 2400 emu/g.