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  4. Effect of bismuth titanate on the properties of potassium sodium niobate-based ceramics
 
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Effect of bismuth titanate on the properties of potassium sodium niobate-based ceramics

Citation Link: https://doi.org/10.15480/882.1992
Publikationstyp
Journal Article
Date Issued
2017-01-07
Sprache
English
Author(s)
Mgbemere, Henry Ekene  
Akano, Theddeus T.  
Schneider, Gerold A.  
Institut
Keramische Hochleistungswerkstoffe M-9  
TORE-DOI
10.15480/882.1992
TORE-URI
https://tubdok.tub.tuhh.de/handle/11420/1995
Journal
Journal of Asian ceramic societies  
Volume
5
Issue
1
Start Page
49
End Page
55
Citation
Journal of Asian Ceramic Societies 1 (5): 49-55 (2017)
Publisher DOI
10.1016/j.jascer.2016.12.006
Scopus ID
2-s2.0-85020068016
Publisher
Taylor & Francis
The effect of modifying the properties of KNN-based ceramics with Bi2Ti2O7(BiT) been investigated in this work. The density measurements show that additions of BiT to the samples slightly increase the density values. Scanning electron microscope images of the samples indicate that the average sizes of the grains decrease with BiT addition while the volume of pores increase. X-ray diffraction results show that for (K0.5Na0.5)NbO3based samples, a transformation from orthorhombic to pseudo-cubic phase is observed. For both K0.48Na0.48Li0.04)(Nb0.9Ta0.1)O3and K0.48Na0.48Li0.04)(Nb0.86Ta0.1Sb0.04)O3-based compositions, the phase transition is from an orthorhombic-tetragonal coexistence to a tetragonal structure dominated phase coexistence. The dielectric constant, dielectric loss and resistivity values of the samples increase slightly with BiT addition. Good hysteresis curves are obtained in (K0.5Na0.5)NbO3-based samples only at low BiT amounts. Remnant polarization values between 9 μC/cm2and 25 μC/cm2are obtained for K0.48Na0.48Li0.04)(Nb0.9Ta0.1)O3and K0.48Na0.48Li0.04)(Nb0.86Ta0.1Sb0.04)O3-based samples. With the exception of KNNLT samples where the d*33values increase from 203 ± 7 pm/V at 0 mol% to 275 ± 6 pm/V at 0.35 mol%, the d*33values of the samples gradually decrease with increasing BiT content. This work shows that to obtain good properties for KNN-based ceramics, only very small amounts of BiT are required.
Subjects
high-throughput experimentation
(KxNa1-x)NbO3 ceramics
ferroelectrics
piezoelectrics
DDC Class
540: Chemie
More Funding Information
Deutsche Forschungsgemeinschaft SCHN 372/16:1-2
Lizenz
https://creativecommons.org/licenses/by-nc-nd/4.0/
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