Conductive property of BiFeO3–BaTiO3 ferroelectric ceramics with high Curie temperature

High Energy Density Achieved in Novel Lead-Free BiFeO3–CaTiO3 Ferroelectric Ceramics for High-Temperature Energy Storage Applications

“…Thus, RFEs exhibit high η and moderate W rec . ,,− In the field of electrical engineering, the achievement of low P r , high P m , and high E b values is critical for enhancing the energy storage capabilities of capacitors. Novel materials like BiFeO 3 demonstrate high spontaneous polarization (∼100 μC cm –1 ) and high Curie temperature (∼820 °C), resembling their potential as energy storage FE dielectric ceramics. − BT-BFO-based ceramics have been extensively researched due to their large breakdown field compared to unmodified BFO. − Unfortunately, many of the BT-, BNT-, KNN- and BF-based FE materials yielded a low W rec due to their large P r and limited permissible EF. In contrast to the typical (Na 0.5 Bi 0.5 )­TiO 3 (NBT) matrix, which possesses strong FE properties and is commonly used to create RFEs − (Na 0.5 Bi 0.5 ) 0.7 Sr 0.3 TiO 3 (NBST), strontium-doped NBT partially substitutes the Sr 2+ ions at the Na 2+ sites and was extensively investigated for its high P m (47.2 μC cm –2 ) along with small P r (8.2 μC cm –2 ) .…”