Effect of Composition on the Growth of Single Crystals of (1−x)(Na1/2Bi1/2)TiO3-xSrTiO3 by Solid State Crystal Growth
1
School of Materials Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
2
Korea Basic Science Institute, Gwangju Center, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
*
Author to whom correspondence should be addressed.
Materials 2019, 12(15), 2357; https://doi.org/10.3390/ma12152357
Received: 2 July 2019
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Revised: 16 July 2019
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Accepted: 22 July 2019
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Published: 24 July 2019
(This article belongs to the Special Issue Sintering and Grain Growth Behavior of Ceramics)
The (1−x)(Na1/2Bi1/2)TiO3-xSrTiO3 (NBT-100xST) system is a possible lead-free candidate for actuator applications because of its excellent strain vs. electric field behaviour. Use of single crystals instead of polycrystalline ceramics may lead to further improvement in piezoelectric properties but work on single crystal growth in this system is limited. In particular, the effect of composition on single crystal growth has yet to be studied. In this work, single crystals of (NBT-100xST) with x = 0.00, 0.05, 0.10 and 0.20 were grown using the method of Solid State Crystal Growth. [001]-oriented SrTiO3 single crystal seeds were embedded in (NBT-100xST) ceramic powder, which was then pressed to form pellets and sintered at 1200 °C for 5 min–50 h. Single crystal growth rate, matrix grain growth rate and sample microstructure were examined using scanning and transmission electron microscopy. The results indicate that the highest single crystal growth rate was obtained at x = 0.20. The mixed control theory of grain growth is used to explain the single crystal and matrix grain growth behaviour.
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Keywords:
lead-free piezoelectric; (Na1/2Bi1/2)TiO3; single crystal growth; grain growth; micro-structure
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MDPI and ACS Style
Le, P.G.; Fisher, J.G.; Moon, W.-J. Effect of Composition on the Growth of Single Crystals of (1−x)(Na1/2Bi1/2)TiO3-xSrTiO3 by Solid State Crystal Growth. Materials 2019, 12, 2357. https://doi.org/10.3390/ma12152357
AMA Style
Le PG, Fisher JG, Moon W-J. Effect of Composition on the Growth of Single Crystals of (1−x)(Na1/2Bi1/2)TiO3-xSrTiO3 by Solid State Crystal Growth. Materials. 2019; 12(15):2357. https://doi.org/10.3390/ma12152357
Chicago/Turabian StyleLe, Phan G., John G. Fisher, and Won-Jin Moon. 2019. "Effect of Composition on the Growth of Single Crystals of (1−x)(Na1/2Bi1/2)TiO3-xSrTiO3 by Solid State Crystal Growth" Materials 12, no. 15: 2357. https://doi.org/10.3390/ma12152357
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