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Second phase and defect formation in Bi0.5Na 0.5-xKxTiO3 Ceramics
Chen P.-Y.2; Chou C.-C.2; Tseng T.-Y.4; Chen H.3
2010-06-01
Source PublicationJapanese Journal of Applied Physics
ISSN00214922 13474065
Volume49Issue:6 PART 1Pages:0615061-0615067
AbstractThe second phase and defect formation mechanisms of [Bi (NaK )]TiO (BNKT100x) ceramics were investigated using electron microscopy, X-ray photoelectron spectroscopy (XPS), and electrical properties measurement. Experimental results indicated that second phase formation induces Bi-rich regions and compositional inhomogeneity within the matrix owing to the thermodynamic stability of potassium titanate. The Ti valence transition for BNKT ceramics sintered in air might be ascribed to the formation of secondary phase and low oxygen atmosphere, rather than simply attributed to the volatilization of bismuth. Li substitution at the A-site in BNKT ceramics suppresses formation of the second phase and Ti valence transition. Appropriate atmosphere control during material processing, such as sintering at higher oxygen pressure, and post oxidization annealing suppress oxygen vacancies and titanium valence transition, and therefore decrease the leakage current as well as improve electrical properties. © 2010 The Japan Society of Applied Physics.
DOI10.1143/JJAP.49.061506
URLView the original
Language英語
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Cited Times [WOS]:17   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Mingchi Institute of Technology
2.National Taiwan University of Science and Technology
3.Tunghai University
4.National Chiao Tung University Taiwan
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GB/T 7714
Chen P.-Y.,Chou C.-C.,Tseng T.-Y.,et al. Second phase and defect formation in Bi0.5Na 0.5-xKxTiO3 Ceramics[J]. Japanese Journal of Applied Physics,2010,49(6 PART 1):0615061-0615067.
APA Chen P.-Y.,Chou C.-C.,Tseng T.-Y.,&Chen H..(2010).Second phase and defect formation in Bi0.5Na 0.5-xKxTiO3 Ceramics.Japanese Journal of Applied Physics,49(6 PART 1),0615061-0615067.
MLA Chen P.-Y.,et al."Second phase and defect formation in Bi0.5Na 0.5-xKxTiO3 Ceramics".Japanese Journal of Applied Physics 49.6 PART 1(2010):0615061-0615067.
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