• Manan, Abdul
• Ahmad, Iftikhar
• Arif, Muhammad
• Bashir, Tariq
• Sadiq, Muhammad
• Arbab, Safeer Ahmad
• Khan, Aqib Ali
• Saboor, Abdul
• Ullah, Atta
• Khan, Muhammad Naeem

Abstract

<jats:title>Abstract</jats:title><jats:p>The development in field of hybrid vehicles, telecommunication and energy sectors require dielectric materials having high-energy storage density with optimum thermal stability to operate in certain environment. To fulfil such requirement a new set of materials along the ternary solid solutions of 0.92Bi<jats:sub>0.5(1-x)</jats:sub>-La<jats:sub>(x)</jats:sub>Na<jats:sub>0.5</jats:sub>TiO<jats:sub>3</jats:sub> -0.06Ba(Zr<jats:sub>0.2</jats:sub>Ti<jats:sub>0.8</jats:sub>)O<jats:sub>3</jats:sub>-0.02NaNbO<jats:sub>3</jats:sub> (NB<jats:sub>1-x</jats:sub>L<jats:sub>x</jats:sub>T-BZT-NN) (x = 0, 0.03, 0.05, 0.07) were fabricated through solid-state mix oxide route. The XRD patterns analysis confirmed a structural phase transformation from rhombohedral to the tetragonal-P4bm phase when x content increased from 0 to 0.07. The SEM study revealed, dense microstructure for all ceramics accompanied by a decrease in the average grain from 1.66 <jats:italic>μ</jats:italic>m to 1.05 <jats:italic>μ</jats:italic>m leading to high densities for these materials with an increase in the x content. The dielectric breakdown field increased from ∼115 to 137 kV cm<jats:sup>−1</jats:sup> resulting in an increase in recoverable energy density from ∼0.68 to 1.14 J cm<jats:sup>−3</jats:sup> with the increase in x content. Furthermore, excellent temperature stability (±15%) in dielectric permittivity was observed in a wide temperature range for each ceramic. In the present study, a recoverable energy density of 1.14 J cm<jats:sup>−3</jats:sup> along with an efficiency of 70.6% was obtained for the composition of x = 0.07.</jats:p>

Topics

• density
• energy density
• grain
• phase
• scanning electron microscopy
• x-ray diffraction
• ceramic