Phase formation, microstructure and electrical properties of BNT-SBT ceramics prepared via the solid-state combustion technique. Issue 1 (10th December 2022)

• Record Type: Journal Article
• Authors: Sinkruason, Thanapon; Junngern, Jeeranan; Sumang, Rattiphorn; Charoenthai, Nipaphat; Bongkarn, Theerachai
• Is Part Of: Ferroelectrics. Volume 601:Issue 1(2022)
• Page Start: 108
• Page End: 118
• Publication Date: 2022-12-10
• Subjects: BNT-SBT -- solid-state combustion -- dielectric -- ferroelectric; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/00150193.2022.2151864
• Languages: English
• ISSNs: 0015-0193

Abstract

Abstract: Lead-free ceramics of 0.6Bi0.5 Na0.5 TiO3 -0.4Sr0.7 Bi0.2 TiO3 (BNT-SBT) were prepared by the solid-state combustion technique using glycine as fuel. The samples were calcined and sintered from 700 to 900 °C for 2 h and from 1100 to 1175 °C for 2 h, respectively. Their phase structure, microstructure and electrical properties were investigated. The XRD and Rietveld refinement results of the ceramic samples showed coexisting rhombohedral and tetragonal phases, with a ratio of 56:44 at a sintering temperature of 1150 °C. The average grain size and the measured density increased with increased sintering temperatures. The highest dielectric, ferroelectric and energy storage properties ( ε max =3142 and tan δ max =0.041, P max =27.09 μC/cm 2, W total =1.099 J/cm 3, η = 81.3% and P es =1.16%) were obtained from the sample sintered at 1150 °C.