High energy-storage performance in X9R-type Na0.5Bi0.5TiO3-based lead-free ceramics
Source abstract
Abstract
KaTaO 3 (KT) modified Na 0.5 Bi 0.5 TiO 3 –BaTiO 3 lead-free ceramics (1- x )(0.94Na 0.5 Bi 0.5 TiO 3 -0.06BaTiO 3 )- x KTaO 3 (NBT-BT- x KT, x = 0.20, 0.25, 0.30, and 0.35) were fabricated via the solid-state reaction method. The effect of KT modification on the structural, dielectric , and energy-storage properties of the ceramics were systematically investigated. Our results show that the NBT-BT- x KT sample shows excellent thermal stability of dielectric constant ( Δ ε ′ / ε 25 o C ′ ≤ ±15%) over the temperature range of -60-215 °C with very low loss (≤0.02). Meanwhile, a large energy storage density ( W rec = 4.89 J/cm 3 ), excellent efficiency ( η = 84%), and an ultrafast discharge rate of 29 ns were also achieved in the NBT-BT-0.3 KT ceramic. This work indicates that the NBT-BT-0.30 KT sample would be a promising material for pulsed electrical applications working in extreme environments.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Dielectric materials and actuators
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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