Magnetic and electrical properties of pseudowollastonite nanoceramic prepared by wet method

Pseudowollastonite with different CoO contents (0.0-9.5wt.%) was systematized by the wet precipitation method and sintered for 1 h at 1300 °C. XRD patterns demonstrated a nanoceramic composite structure with nanocrystallite sizes rising from 77.6 to 86.1 nm as CoO content increases from 0.0 to 9.5wt.% in composites. The addition of CoO causes RAMAN bands shift and intensity variations, indicating structural alterations. The magnetic moment values rise from 75.6 × 10^- 3 to 0.481emu/g with increasing CoO content from 3.5 to 9.5wt.%. Hence the nanoceramics acquire a magnetic property from the CoO component. Electrode polarization dominates the spectra at lower frequencies. The dielectric spectra are conquered on the low frequency side by electrode polarization effects, although the investigated nanoceramics are insulators, and their resistivity rises with increasing CoO content. The higher frequency side is characterized by charge transport in a disordered matrix as the underlying physical mechanism. The novelty of this work lies on emerging pseudowollastonite phase via rising the sintering temperature to 1300 °C which opens applications for new industrial uses.