Sol-Gel Synthesis and Characterization of Nanocrystalline Bi₄Ti₃O₁₂ Powders

Abstract:

Nanocrystalline bismuth titanate (Bi4Ti3O12; BTO) powders were successfully prepared by the sol-gel method, using bismuth nitrate (Bi(NO3)3·5H2O) and tetrabutyl titanate (Ti(OC4H9)4) as source materials, acetic anhydride and ethanediol as solvents. The thermal decomposition and phase inversion process of the gel precursors were studied by using differential thermal analysis (DTA). The crystal structures and microstructures of BTO powders were investigated by using x-ray diffraction (XRD), and transmission electron microscope (TEM). The crystallization of amorphous bismuth titanate has been discussed. The effect of sintering temperature on the structure and morphology of BTO was investigated. At 644 oC and above, BTO powder undergoes a phase transformation from tetragonal to orthorhombic. At 900 oC, the purified orthorhombic BTO nanocrystals were obtained.

• Periodical: Advanced Materials Research (Volume 997)
• Pages: 359-362
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.997.359
• Online since: August 2014
• Authors: Chun Hong Ma, Xue Lin*, Liang Wang, Yong Sheng Yan
• Keywords: Bismuth Titanate, Nanocrystal, Sol-Gel Method

References

[1] M.E. Lines , A.M. Glass, Principles and Applications of Ferroelectrics and Related Materials, New York: Oxford University Press (2001)7–9.

[2] B.H. Park , B.S. Kang, S.D. Bu, Lanthanum substituted bismuth titanate for use in non-volatile memorie, Nature 401 (1999) 682–684.

DOI: 10.1038/44352

[3] X. Lin, Q. F. Guan , Y. Liu, Lanthanum-doped Bi4Ti3O12 ceramics prepared by high-pressure technique, Chin Phys B 19(10) (2010) 107701-06.

[4] Y.Y. Wu , D.M. Zhang, J. Yu, Microstructure and electrical properties of Bi2O3 excess Bi3. 25La0. 75Ti3O12 ferroelectric ceramics, Mater Chem Phys 113 (2009) 422–427.

DOI: 10.1016/j.matchemphys.2008.07.103

[5] S. Hao , Y.D. Wei , X.R. Liu, La2Ti6O15-CeTi21O38-PbTiO3 ceramics formed in gaseous penetration of La-Ce into PbTiO3 and their electric properties. Sci China Ser B-Chem, 46(3) (2003) 313–319.

DOI: 10.1360/02yb0175

[6] A. Watcharapasorn, P. Siriprapa, S. Jiansirisomboon, Grain growth behavior in bismuth titanate-based ceramics, J Eur Ceram Soc 30 (2010) 87–93.

DOI: 10.1016/j.jeurceramsoc.2009.07.031

[7] Y. Wang, Y.J. Su, W.Y. Chu, Effect of electric field, stress and environment on delayed fracture of a PZT-5 ferroelectric ceramic, Sci China Ser G-Phys Mech Astron, 48(1) (2005) 89–100.

DOI: 10.1360/03yw0146

[8] A.Z. Simões, E.C. Aguiar , A. Ries, Niobium doped Bi4Ti3O12 ceramics obtained by the polymeric precursor method. Mater Lett 61 (2007) 588–591.

DOI: 10.1016/j.matlet.2006.05.014

[9] A.Z. Simões , C. Quinelato, A. Ries, Preparation of lanthanum doped Bi4Ti3O12 ceramics by the polymeric precursor method, Mater Chem Phys 98 (2006) 481–485.

DOI: 10.1016/j.matchemphys.2005.09.070

[10] G.C. Xu, L. Pan, Q.F. Guan, Crystallization of amorphous bismuth titanate (in Chinese), Acta Phys Sin, 55 (2006) 3080–3085.