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Effects of second phase and defect on electrical properties in Bi 0.5Na0.5-xKxTiO3 lead-free piezoelectric ceramics
Chen P.Y.1; Chen C.S.2; Chou C.-C.3; Tseng T.-Y.5; Chen H.4
2011-08-01
Source PublicationAdvanced Materials Research
Volume284-286
Pages1343-1348
AbstractSecond phase and defect formation mechanism of (Bi(Na K))TiO (BNKT100x) ceramics were investigated using electron microscopy, x-ray photoelectron spectroscope (XPS) and electrical properties measurements. Experimental results indicated that second phase formation induces Bi-rich regions and compositional inhomogeneity within matrix due to thermodynamic stability of potassium titanate. Ti valence transition for BNKT ceramics sintered in air might be ascribed to formation of the secondary phase, rather than simply attributed to volatilization of bismuth. Li substitution at A-site in BNKT ceramics suppresses formation of the second phase and Ti valence transition. Appropriate Li doped BNKT ceramics suppress oxygen vacancies and titanium valence transition, and therefore decrease the leakage current. © (2011) Trans Tech Publications, Switzerland.
KeywordBNKT Defect Lead-free piezoelectric Second phase
DOI10.4028/www.scientific.net/AMR.284-286.1343
URLView the original
Language英語
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Document TypeConference paper
CollectionUniversity of Macau
Affiliation1.Mingchi Institute of Technology
2.Hwa Hsia Institute of Technology Taiwan
3.National Taiwan University of Science and Technology
4.Tunghai University
5.National Chiao Tung University Taiwan
Recommended Citation
GB/T 7714
Chen P.Y.,Chen C.S.,Chou C.-C.,et al. Effects of second phase and defect on electrical properties in Bi 0.5Na0.5-xKxTiO3 lead-free piezoelectric ceramics[C],2011:1343-1348.
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