Effect of MnO2 addition on relaxor behavior and electrical properties of PMNST ferroelectric ceramics
Source abstract
Abstract
Abstract A novel ferroelectric system, 0.2Pb(Mg 1/3 Nb 2/3 )O 3 –0.8Pb(Sn 0.46 Ti 0.54 )O 3 with MnO 2 addition (PMNST-Mn), was prepared. The dielectric, ferroelectric and piezoelectric properties were investigated. The results demonstrated that the addition of MnO 2 suppressed the dielectric relaxor behavior of PMNST. With the increase of MnO 2 addition, the diffuse phase transition (DPT) behavior weakened gradually. The addition of MnO 2 contributed to the decrease of the dielectric loss (tan δ ) and the enhancement of ferroelectric polarization. The optimum ferroelectric and piezoelectric properties were obtained when the addition of MnO 2 is 0.75 mol%, and the remnant polarization ( P r ) and mechanical quality factor ( Q m ) were about 25% and 60% higher than those of PMNST, respectively. It was suggested that the formation of oxygen vacancies made the important contribution to suppressing relaxor behavior and improving the electrical properties of PMNST due to the substitution of Mn for B -site. This work provided a practicable strategy to tune electrical properties of ferroelectrics.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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