Enhanced electrical properties in lead-free NBT–BT ceramics by series ST substitution
Source abstract
Abstract
Abstract Comprehensive electrical properties of 0.94(Na 1/2 Bi 1/2 )TiO 3 –0.06BaTiO 3 lead-free ceramics by doping series SrTiO 3 were investigated. High piezoelectric constant of 205 pC/N and electromechanical coupling factor of 0.34 were obtained due to the forming of the rhombohedral–tetragonal morphotropic phase boundary at x =0.02–0.06. Very large recoverable strain of 0.34% was obtained at x =0.10 due to the coexistence of ferroelectric and relaxor pseudocubic phases. A large electrocaloric effect (Δ T max =1.71 K and Δ T /Δ E =0.34 K mm kV −1 at 50 kV cm −1 ) which determined by indirect measurements method was obtained at 120 °C at x =0.02, which is significantly higher than that of lead-free ferroelectric ceramics reported so far. Moreover, lower operating temperatures of 50 °C and 30 °C were proposed when x =0.10 and 0.20 with Δ T max =0.79 K and 0.6 K, respectively. These properties added together indicate a promising material for applications in cooling systems and actuators.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Multiferroics and related materials · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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