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Structure and electrical properties of [(Na0.825K0.175)(0.5)Bi-0.5](1+x)TiO3 piezoceramics with A-site nonstoichiometry
Chen, XM; Liao, YW; Li, GR
2020-08-21
Source PublicationJOURNAL OF ASIAN CERAMIC SOCIETIES
ISSN2187-0764
SubtypeArticle; Early Access
AbstractA type of nonstoichiometric piezoceramics, [(Na0.825K0.175)(0.5)Bi-0.5](1+x)TiO3 (BKNT-x, x = 0-0.009), was synthesized by the conventional sintering method. The effects of Bi3+, Na+ and K(+)content on the structure and electrical properties of 0.825Bi(0.5)Na(0.5)TiO(3)-0.175Bi(0.5)K(0.5)TiO(3) piezoceramics were investigated. The XRD patterns demonstrated that BKNT-x piezoceramics form a solid solution without a secondary phase. Meanwhile, SEM micrographs indicated that excess [(Na0.825K0.175)(0.5)Bi-0.5](2+) suppresses grain growth and that BKNT-x ceramics become considerably denser. BKNT-0.002 ceramics offer the following enhanced properties: d(33) = 154 pC/N, k(p) = 33%, epsilon(r) = 1087, tan delta = 0.036, and Q(m) = 116. This improvement of properties is most likely related to the dense structure and the maintenance of morphotropic phase boundaries through the introduction of a proper A-site cation excess. For ceramics containing volatile elements, stoichiometric control is an efficacious method of enhancing performance.
DOI10.1080/21870764.2020.1806192
WOS KeywordFREE PIEZOELECTRIC CERAMICS ; DIELECTRIC-PROPERTIES ; PHASE ; MICROSTRUCTURE ; TEMPERATURE ; SYSTEM
Language英语
WOS Research AreaMaterials Science
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27819
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Chen, XM,Liao, YW,Li, GR. Structure and electrical properties of [(Na0.825K0.175)(0.5)Bi-0.5](1+x)TiO3 piezoceramics with A-site nonstoichiometry[J]. JOURNAL OF ASIAN CERAMIC SOCIETIES,2020.
APA Chen, XM,Liao, YW,&Li, GR.(2020).Structure and electrical properties of [(Na0.825K0.175)(0.5)Bi-0.5](1+x)TiO3 piezoceramics with A-site nonstoichiometry.JOURNAL OF ASIAN CERAMIC SOCIETIES.
MLA Chen, XM,et al."Structure and electrical properties of [(Na0.825K0.175)(0.5)Bi-0.5](1+x)TiO3 piezoceramics with A-site nonstoichiometry".JOURNAL OF ASIAN CERAMIC SOCIETIES (2020).
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