Effect of oxygen vacancy and A-site-deficiency on the dielectric performance of BNT-BT-BST relaxors
Source abstract
Abstract
Abstract There is an urgent need for dielectrics to suit multitudinous burgeoning applications with high-temperature dielectric stability. Here the intrinsic defect and polarization mechanism are investigated in A-site-deficient 0.66(Bi0.5Na0.5)TiO3-0.06BaTiO3-0.28(BixSr1–3x/2▯x/2)TiO3 (BNT-BT-BST) relaxors where strontium vacancies ( V Sr ′ ′ ) are designed to compensate the negative charge shortage when Sr2+ is substituted by Bi3+ ( Bi Sr • ). Incremental Bi3+ is conducive to the polarization in nano-regions at high temperatures resulting in an enhancement of the temperature stability of dielectric permittivity. It reveals a strong defect induced disorder accompanied with slightly increased dielectric loss due to the partial reduction of Ti4+. Furthermore, the existing oxygen vacancies confirmed by X-ray photoelectron and atmosphere dependent ac impedance spectroscopies are suppressed effectively when sintering at O2 for BNT-BT-BST to the benefit of maintaining stable dielectric properties. Remarkably high energy storage density and efficiency are achieved simultaneously under relatively low electric fields. This work not only provides promising candidates in Bi0.5Na0.5TiO3 (BNT) based relaxors but also demonstrates an effective route considering the importance of oxygen vacancies in the optimization for dielectric applications.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Dielectric properties of ceramics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (71)
Show source-provided references
1. High-temperature dielectrics in CaZrO3-modified Bi1/2Na1/2TiO3-based lead-free ceramics10.1016/j.jeurceramsoc.2012.06.011 ↗
2. High temperature dielectrics in the ceramic system K0.5Bi0.5TiO3-Ba(Zr0.2Ti0.8)O3-Bi(Zn2/3Nb1/3)O310.1016/j.ceramint.2017.03.076 ↗
3. Temperature invariant high dielectric properties over the range 200 °C–500 °C in BiFeO3 based ceramics10.1016/j.jeurceramsoc.2017.11.049 ↗
4. Lead-free high-temperature dielectrics with wide operational range10.1063/1.3544481 ↗
5. High-temperature lead-free multilayer ceramic capacitors with ultrahigh energy density and efficiency fabricated via two-step sintering
6. Perovskite lead-free dielectrics for energy storage applications10.1016/j.pmatsci.2018.12.005 ↗
7. Size-dependence of the dielectric breakdown strength from nano- to millimeter scale10.1016/j.jmps.2013.09.009 ↗
8. Theoretical investigation on linear and nonlinear dielectric function for GaN/AlxGa1−xN core/shell quantum dots10.1016/j.mseb.2020.114675 ↗
9. High temperature and high energy density dielectric materials
10. Improvement of dielectric and ferroelectric properties in bismuth sodium titanate based relaxors through Bi non-stoichiometry10.1016/j.jallcom.2019.05.321 ↗
11. Enhanced high temperature stability of BNT-BKT-CBTZ lead-free dielectrics10.1149/2.0231911jss ↗
12. High energy and power density capacitors from solution‐processed ternary ferroelectric polymer nanocomposites10.1002/adma.201402106 ↗
13. Enhancement of recoverable energy density and efficiency of lead-free relaxor-ferroelectric BNT-based ceramics10.1016/j.cej.2020.126818 ↗
14. Reconciling local structure disorder and the relaxor state in (Bi1/2Na1/2)TiO3-BaTiO310.1038/srep31739 ↗
15. Study of relaxor behavior in a lead-free (Na0.5Bi0.5)TiO3-SrTiO3-BaTiO3 ternary solid solution system10.1016/j.ceramint.2016.05.014 ↗
16. Ultrahigh energy density and improved discharged efficiency in bismuth sodium titanate based relaxor ferroelectrics with A-site vacancy10.1016/j.jmat.2018.05.006 ↗
17. Dielectric properties of lead-free BNT-based ferroelectric ceramics near the morphotropic phase boundary10.1016/j.matchemphys.2020.123639 ↗
18. Significantly enhanced energy storage density and efficiency of BNT-based perovskite ceramics via A-site defect engineering10.1016/j.ensm.2020.05.026 ↗
19. Enhanced energy storage properties of BaTiO3-Bi0.5Na0.5TiO3 lead-free ceramics modified by SrY0.5Nb0.5O310.1016/j.jallcom.2018.11.106 ↗
20. Novel BaTiO3-based, Ag/Pd-compatible lead-free relaxors with superior energy storage performance10.1021/acsami.0c13057 ↗
21. High, purely electrostrictive strain in lead-free dielectrics10.1002/adma.200500951 ↗
22. Enhanced recoverable energy storage density and high efficiency of SrTiO3-based lead-free ceramics10.1063/1.5000980 ↗
23. High discharged energy density of polymer nanocomposites containing paraelectric SrTiO3 nanowires for flexible energy storage device10.1016/j.jallcom.2018.02.052 ↗
24. Significantly enhanced recoverable energy storage density in potassium–sodium niobate-based lead free ceramics10.1039/C6TA04107H ↗
25. Potassium–sodium niobate based lead-free ceramics: novel electrical energy storage materials10.1039/C6TA07803F ↗
26. Oxygen-vacancy-related dielectric relaxation behaviours and impedance spectroscopy of Bi(Mg1/2Ti1/2)O3 modified BaTiO3 ferroelectric ceramics10.1016/j.jmat.2018.03.001 ↗
27. Properties of 0.94Bi0.5Na0.5TiO3–0.06BiAlO3 ceramics prepared by two steps sintering technique10.1080/00150193.2013.850366 ↗
28. High energy-storage density under low electric fields and improved optical transparency in novel sodium bismuth titanate-based lead-free ceramics10.1016/j.jeurceramsoc.2019.09.001 ↗
29. Practical high piezoelectricity in barium titanate ceramics utilizing multiphase convergence with broad structural flexibility10.1021/jacs.8b07844 ↗
30. Dielectric, ferroelectric, and energy storage properties in dysprosium doped sodium bismuth titanate ceramics10.1016/j.ceramint.2018.07.182 ↗
31. Optimizing the defect chemistry of Na1/2Bi1/2TiO3-based materials: paving the way for excellent high temperature capacitors10.1039/C8TC01010B ↗
32. Impedance spectroscopy of (Bi1/2Na1/2)TiO3-BaTiO3 ceramics modified with (K0.5Na0.5)NbO3
33. Defect chemistry and electrical properties of sodium bismuth titanate perovskite10.1039/C7TA09245H ↗
34. Suppression of electrical conductivity and switching of conduction mechanisms in ‘stoichiometric’ (Na0.5Bi0.5TiO3)1−x(BiAlO3)x (0 ≤ x ≤ 0.08) solid solutions10.1039/C7TC02519J ↗
35. Enhanced bulk conductivity of A-site divalent acceptor-doped non-stoichiometric sodium bismuth titanate10.1016/j.ssi.2016.09.016 ↗
36. Dramatic influence of A-site nonstoichiometry on the electrical conductivity and conduction mechanisms in the perovskite oxide Na0.5Bi0.5TiO310.1021/cm504475k ↗
37. Designing properties of (Na1/2Bix)TiO3-based materials through A-site non-stoichiometry10.1039/C7TC03975A ↗
38. Crystal structure, defect chemistry and oxygen ion transport of the ferroelectric perovskite, Na0.5Bi0.5TiO3: insights from first-principles calculations10.1039/C5TA03705K ↗
39. Study on the electrical conductivity and relaxation behavior of K-doped Na0.5Bi0.5TiO3 ceramics10.1007/s10854-017-8338-8 ↗
40. Enhanced energy-storage properties of 0.89Bi0.5Na0.5TiO3–0.06BaTiO3–0.05K0.5Na0.5NbO3 lead-free anti-ferroelectric ceramics by two-step sintering method10.1016/j.matlet.2013.09.103 ↗
41. Enhanced energy storage properties of lead-free (1−x)Bi0.5Na0.5TiO3–xSrTiO3 antiferroelectric ceramics by two-step sintering method10.1007/s10854-016-5550-x ↗
42. Impact of La doping on performance of Na0.5Bi0.5TiO3-Ba0.7-LaSr0.3Sn0.1Ti0.9-0.25O3 dielectric ceramics10.1016/j.jallcom.2018.02.183 ↗
43. Investigation of morphotropic phase boundary by rietveld refinement and Raman spectroscopy for (1-x)(Na0.5Bi0.5)TiO3-xBaTiO3 ceramics10.14233/ajchem.2018.21116 ↗
44. XRD, Raman and electrical studies on the (1-x)(Na0.5Bi0.5)TiO3-xBaTiO3 lead free ceramics10.1016/j.jallcom.2014.08.161 ↗
45. Relaxor-like and spectroscopic properties of niobium modified barium titanate10.1007/s100510070008 ↗
46. Lone-pair-induced covalency as the cause of temperature- and field-induced instabilities in bismuth sodium titanate10.1002/adfm.201102758 ↗
47. Chemical and structural effects on the high-temperature mechanical behavior of (1−x)(Na1/2Bi1/2)TiO3-xBaTiO3 ceramics10.1063/1.4916784 ↗
48. B-site vacancy induced Raman scattering in BaTiO3-based ferroelectric ceramics10.1016/j.jeurceramsoc.2020.05.051 ↗
49. Tunable phase transition in (Bi0.5Na0.5)0.94Ba0.06TiO3 by B-site cations10.1007/s00339-020-3448-1 ↗
50. Thermal evolution of polar nanoregions identified by the relaxation time of electric modulus in the Bi1/2Na1/2TiO3 system10.1209/0295-5075/118/47001 ↗
51. High temperature lead-free BNT-based ceramics with stable energy storage and dielectric properties10.1039/C9TA10347C ↗
52. On the phase identity and its thermal evolution of lead free (Bi1/2Na1/2)TiO3-6 mol% BaTiO310.1063/1.3645054 ↗
53. High temperature dielectric stable (1-x)[(Na0.5Bi0.5)0.92Ba0.08]0.955La0.03TiO3-xNaNbO3 system with ultra-low dielectric loss range through optimizing the defect chemistry10.1016/j.jallcom.2020.156308 ↗
54. Dielectric behavior and impedance spectroscopy in lead-free BNT–BT–NBN perovskite ceramics for energy storage10.1016/j.ceramint.2016.03.062 ↗
55. Enhanced temperature stability and defect mechanism of BNT-based lead-free piezoceramics investigated by a quenching process10.1002/aelm.201800756 ↗
56. Oxygen vacancy-rich mesoporous ZrO2 with remarkably enhanced visible-light photocatalytic performance10.1016/j.solmat.2018.03.023 ↗
57. Tetragonal phase and enhanced depolarization temperature in Ba-rich (Bi,Na)TiO3–BaTiO3 lead-free piezoelectrics10.1016/j.ceramint.2019.10.091 ↗
58. Perovskite Srx(Bi1−xNa0.97−xLi0.03)0.5TiO3 ceramics with polar nano regions for high power energy storage10.1016/j.nanoen.2018.06.016 ↗
59. Achieved ultrahigh energy storage properties and outstanding charge–discharge performances in (Na0.5Bi0.5)0.7Sr0.3TiO3-based ceramics by introducing a linear additive10.1016/j.cej.2019.123729 ↗
60. Relaxor ferroelectric BaTiO3-Bi(Mg2/3Nb1/3)O3 ceramics for energy storage application10.1111/jace.13325 ↗
61. High energy storage density over a broad temperature range in sodium bismuth titanate-based lead-free ceramics10.1038/s41598-017-06966-7 ↗
62. Energy storage properties and electrical behavior of lead-free (1 − x) Ba0.04Bi0.48Na0.48TiO3–xSrZrO3 ceramics10.1007/s10854-015-4247-x ↗
63. A new energy-storage ceramic system based on Bi0.5Na0.5TiO3 ternary solid solution10.1016/j.ceramint.2016.05.065 ↗
64. Enhanced dielectric breakdown strength and energy storage density in lead-free relaxor ferroelectric ceramics prepared using transition liquid phase sintering10.1039/C6RA01919F ↗
65. Energy-storage properties of (1−x)Bi0.47Na0.47Ba0.06TiO3–xKNbO3 lead-free ceramics10.1016/j.jallcom.2013.09.052 ↗
66. BaTiO3–BiYbO3 perovskite materials for energy storage applications10.1039/C5TA03614C ↗
67. Lead-free BaTiO3–Bi(Zn2/3Nb1/3)O3 weakly coupled relaxor ferroelectric materials for energy storage10.1039/C5RA21261H ↗
68. Field-induced polarization response and energy storage behavior of lead-free BNT-BKT-SZ films10.1016/j.ceramint.2020.07.099 ↗
69. High electrostrictive strain in lead-free relaxors near the morphotropic phase boundary10.1016/j.actamat.2019.10.034 ↗
70. Giant strain with low hysteresis in A-site-deficient (Bi0.5Na0.5)TiO3-based lead-free piezoceramics10.1016/j.actamat.2017.02.037 ↗
71. Large electrostrictive strain in (Bi0.5Na0.5)TiO3-BaTiO3-(Sr0.7Bi0.2)TiO3 solid solutions10.1111/jace.12712 ↗