Sintering of 94Na0.5Bi0.5TiO3-6BaTiO3 with SPS and conventional methods for crystal growth
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
In this study, lead-free 94Na0.5Bi0.5TiO3-6BaTiO3 (94NBT-6BT) piezoelectric ceramics and embedded single crystals inpolycrystalline 94NBT-6BT matrix were sintered by conventional (CS) and spark plasma sintering (SPS) techniques. Theeffects of SPS and CS on the microstructure of the 94NBT-6BT ceramics were discussed and compared. Theoretical densityof the CS and SPS treated samples were found to be 94% and almost 99.9%, respectively. High porosity and weak seed-matrixinteraction at 1180 oC for 2 h were obtained from CS sintered ceramics. On the other hand, sintered samples with SPS showednon-porous polycrystalline matrix, and quite strong seed-matrix interface bonding at 950 oC for 5 min. Also, dielectricproperties of sintered ceramics with SPS gave better results than CS. Therefore, SPS assisted 94NBT-6BT samples can be usedto grow high quality and high performance single crystals using solid state single crystal growth.
Abstract
In this study, lead-free 94Na0.5Bi0.5TiO3-6BaTiO3 (94NBT-6BT) piezoelectric ceramics and embedded single crystals inpolycrystalline 94NBT-6BT matrix were sintered by conventional (CS) and spark plasma sintering (SPS) techniques. Theeffects of SPS and CS on the microstructure of the 94NBT-6BT ceramics were discussed and compared. Theoretical densityof the CS and SPS treated samples were found to be 94% and almost 99.9%, respectively. High porosity and weak seed-matrixinteraction at 1180 oC for 2 h were obtained from CS sintered ceramics. On the other hand, sintered samples with SPS showednon-porous polycrystalline matrix, and quite strong seed-matrix interface bonding at 950 oC for 5 min. Also, dielectricproperties of sintered ceramics with SPS gave better results than CS. Therefore, SPS assisted 94NBT-6BT samples can be usedto grow high quality and high performance single crystals using solid state single crystal growth.
참고문헌 (14)
- Jin-Ho Yeo, "Electrical properties of (Na0.5K0.5)NbO3-(Sr0.5Ca0.5)TiO3 ceramics with the variation of sintering temperature", Journal of Ceramic Processing Research, 14(5), pp.648~651 (2013), 세라믹공정연구센터[DOI]
- P. Jarupoom, "Development of electrical properties in lead-free bismuth sodium lanthanum titanate-barium titanate ceramic near the morphotropic phase boundary", Current Applied Physics, 8(3,4), pp.253~257 (2008), 한국물리학회
- R. Laishram, , Mater. Lett, 137, pp.49~51 (2014)
- 임인호, "Effect of sintering temperatures on electrical properties of 0.95(Na0.5K0.5) NbO3-0.05(Ba0.5Sr0.5)(Ti0.95Sn0.05)O3 lead-free ceramics", Journal of Ceramic Processing Research, 15(1), pp.26~29 (2014), 세라믹공정연구센터[DOI]
- K. R. Han, , Mater. Lett, 60, pp.3596~3600 (2006)
- W. Ge, , J. Alloy. Compd, 456, pp.503~507 (2008)
- Q. Xu, , Mater. Res. Bull, 40, pp.373~382 (2005)
- K. S. Moon, , J. Cryst. Growth, 28, pp.311~317 (2011)
- J. K. Park, , J. Electroceram, 509, pp.513~517 (2006)
- H. Yamada, , Ferroelectrics, 355, pp.231~239 (2007)
- S. Kwon, , Proceedings of the International Ultrasonics, Ferroelectrics and Frequency Control 50th Anniversary Joint Conference, pp.153~ (2004), IEEE
- J. G. Fisher, , J. Am. Ceram. Soc, 91(5), pp.1503~1507 (2008)
- Jiro Abe, "Effects of Spark-Plasma Sintering on the Piezoelectric Properties of High-Density (1-x)(Na0.5K0.5)NbO3-xLiTaO3 Ceramics", Journal of the Korean Physical Society, 51(2I), pp.810~814 (2007), 한국물리학회
- Y. R. Zhang, , J. Am. Ceram. Soc, 91(8), pp.2716~2719 (2008)