Phase, Microstructure and Properties of Reactive Phase Sintered and Controlled Crystallized BaTiO3

Yaseen Iqbal*, Riaz Ullah, Asad Jamal, Muhammad Naeem
Department of Physics, University of Peshawar, Pakistan

Economical methods for fabrication of nano-materials include reactive liquid phase sintering and controlled crystallization of desired phases from relevant glasses. Barium Titanate (BaTiO₃) is a common ferroelectric material with a high dielectric constant, widely used in electronic components such as multilayer capacitors, thermistors, piezoelectric transducers and a variety of electro-optic devices. Recent developments, particularly in nanotechnology have opened broader fields of practical applications of nano-materials and hence created new challenges for researchers. Here we describe results regarding the effect of small additions of fluxing agent (Li₂O) on the sintering temperature, final grain size and electrical properties of BaTiO₃. An addition of 0.3 wt% Li₂O reduced the sintering temperature by ~125°C and grain size to ≤μm in comparison to ≥5μm at optimum sintering temperature for BaTiO3 without Li2O. Results regarding the controlled crystallization of BaTiO₃ from silicate glass melt will also be presented and compared with the Li₂O-added and Li₂O-free BaTiO₃ electro-ceramics.

*presenting author  

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