Abstract
Nanocrystalline strontium hafnate (SrHfO 3) was synthesized through auto-ignited combustion technique. The X-ray diffraction studies of SrHfO 3 nanoparticles have shown that the as-prepared powder was single phase, crystalline, and has an orthorhombic (Pmna) perovskite structure (ABO 3). The phase purity of the powder was further examined using; thermo gravimetric analysis, differential thermal analysis, and Fourier transform infrared spectroscopy. The transmission electron microscopy study showed that the particle size of the as-prepared powder is in the range 20–60 nm with a mean size of 40 nm. The nanopowder could be sintered to 98% of the theoretical density at 1620 °C for 3 h. The microstructure of the sintered surface was examined using scanning electron microscopy. The dielectric constant ( ɛ r) of 25.13 and loss factor (tan δ) of 5.3 × 10 −3 were obtained at 1 MHz.
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