• Praveen Kumar
• Prof. Bharat Mishra

CoNb2O6 was prepared by Chemical roots with alcohol as an additive. X-ray diffraction, Scanning electron microscopy and Transmission electron microscopy were used to investigate the lattice parameters and the particle morphology. The products were observed as irregular particles with an average particle size of ca. 500 nm, which agglomerated from thin slices. Compared with the common columbite CoNb2O6, which was obtained by a traditional solid-state reaction, the product obtained by the hydrothermal method crystallized into a rutile structure. The rutile CoNb2O6 was metastable and it could transform into the columbite structure after calcining at 800 °C in air for 4 h. Niobate compounds has been synthesized by columbite solid-state reaction method and characterized by X-ray diffraction (XRD), scanning electron microscope(SEM) an temperature as well as frequency dependence of dielectric and impedence study. Dielectric properties such as permittivity, dielectric loss, and temperature coefficient of resonant frequency are found to correlate strongly with the M-ions. The temperature coefficient of the resonant frequency may be correlated to the unit cell volume of MNb2O6 among these compounds have very high quality factors.

Ceramics, Phase transformation, Oxides

"Phase Evaluation and Electromagnetic Properties of CoNb2O6 Columbite Material", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 1, page no.a1-a4, January-2024, Available :http://www.jetir.org/papers/JETIR2401001.pdf

"Phase Evaluation and Electromagnetic Properties of CoNb2O6 Columbite Material", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 1, page no. ppa1-a4, January-2024, Available at : http://www.jetir.org/papers/JETIR2401001.pdf