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0.98[(Na(1–x)/2Smx/2Nb0.3TiO3)] + 0.02MnO2 Lead-free Ceramic System Design; An antiferroelectrics with Improved Relaxation Behavior
Journal of Alloys and Compounds ( IF 5.8 ) Pub Date : 2023-05-28 , DOI: 10.1016/j.jallcom.2023.170740
Marwa Emmanuel

The sodium niobate-based ceramics 0.98[(Na(1−x)/2Smx/2Nb0.3TiO3)] + 0.02MnO2 acronymed NSmNT of different compositions (x = 0.05, 0.1, 0.11, 0.12, and 0.13) were prepared via solid-state reaction method. The prepared samples were characterized by XRD to study the phase structure of the designed systems, SEM to study the microstructure properties of the NSmNT ceramics. In addition to that LCR meter was used to measure the sample temperature-dependent dielectric permittivity, dielectric loss, and systems impedance. The results showed an increment in the dielectric breakdown strength (DBS) with increasing x content from 100 kVcm–1 to 450 kVcm–1. Similarly, the high recoverable energy density (Wrec) of 5.61 J cm–3 was obtained for x = 0.11 symbolized (NSmNT2) with an exquisite efficiency of 88%. The study also analyzed the complex impedance of the NSmNT2 ceramics system to clearly understand the dielectric behavior of the system in question. A general view of things considers the NSmNT2 ceramic system to be a reliable system for pulsed power applications.



中文翻译:

0.98[(Na(1–x)/2Smx/2Nb0.3TiO3)] + 0.02MnO2 无铅陶瓷系统设计;具有改善弛豫行为的反铁电体

铌酸钠基陶瓷0.98[(Na (1−x)/2 Sm x/2 Nb 0.3 TiO 3 )] + 0.02MnO 2简称NS m NT 不同成分(x = 0.05, 0.1, 0.11, 0.12, and 0.13)是通过固相反应法制备的。制备的样品通过 XRD 表征以研究设计系统的相结构,通过 SEM 表征 NS m NT 陶瓷的微观结构特性。此外,LCR 表还用于测量样品随温度变化的介电常数、介电损耗和系统阻抗。结果表明,介电击穿强度 (DBS) 随着 x 含量从 100 kVcm –1增加而增加至 450 kVcm –1同样,对于 x = 0.11 符号化 (NS m NT2) ,获得了5.61 J cm –3的高可恢复能量密度 ( W rec ),效率高达 88%。该研究还分析了 NS m NT2 陶瓷系统的复阻抗,以清楚地了解相关系统的介电行为。一般认为 NS m NT2 陶瓷系统是脉冲功率应用的可靠系统。

更新日期:2023-06-02
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