CaCu3Ti4O12纳米粉体及其陶瓷的制备和表征
Synthesis and Characterization of CaCu3Ti4O12Nano-powders and Their Ceramics
作者: 刘宇 , 景帅帅 , 阎雯青 , 张庆 , 湛海涯 , 崔斌 :西北大学合成与天然功能分子化学教育部重点实验室,陕西省物理无机化学重点实验室;
关键词: CaCu<; sub>; 3<; /sub>; Ti<; sub>; 4<; /sub>; O<; sub>; 12<; /sub>; ; 改进草酸盐共沉淀法; 巨介电常数; CaCu<; sub>; 3<; /sub>; Ti<; sub>; 4<; /sub>; O<; sub>; 12<; /sub>; ; Oxalate Improved Coprecipitation Methods; Giant Dielectric Constant
摘要:Abstract: The CaCu3Ti4O12(CCTO) material has wide application prospects due to its giant dielectric constant and good temperature stability. In this paper, the CCTO nano-powders were synthesized by improved oxalate coprecipitation and their ceramics were also prepared. The precursor, calcined powders and their ceramics were characterized by means of FT-IR、TG-DTA、XRD,TEM and SEM, also the dielectric properties were measured. The results indicated that the CCTO nano-powders were obtained by calcining of precursor at 850℃ for 2h, and their ceramics sintered at 980℃ for 4h showed high density and dielectric constants(about 245 000), and the dielectric loss is 0.13. The method of the improved oxalate coprecipitation, which did not need organic solvent and sodium oxalate adding as precipitation agent any more, was favor to reduce the reaction temperature and reaction time. The simplified process reduced the cost greatly and the dielectric properties were improved obviously.
文章引用: 刘宇 , 景帅帅 , 阎雯青 , 张庆 , 湛海涯 , 崔斌 (2011) CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>纳米粉体及其陶瓷的制备和表征。 纳米技术, 1, 1-5. doi: 10.12677/nat.2011.11001
参考文献
[1] M. A. Subramanian, D. Li, N. Duan, et al. High Dielectric Constant in ACu3Ti4O12 and ACu3Ti3FeO12 Phases. Journal of Solid State Chemistry, 2000, 151(2): 323-325.
[2] M. A. Subramanian, A. W. Sleight. ACu3Ti4O12 and ACu3Ru4O12 perovskites: high electric constants and valence degeneracy. Solid State Sciences, 2002, 4(3): 347-351.
[3] L. Marchin, S. G. Fritsch, B. Durand. Soft chemistry synthesis of the perovskite CaCu3Ti4O12. Progress in Solid State Chemistry, 2008, 36(1-2): 151-155.
[4] A. R. West, T. B. Adams, F. D. Morrison, et al. Novel high capacitance materials BaTiO3: La and CaCu3Ti4O12. Journal of the European Ceramic Society, 2004, 24(6): 1439-1448.
[5] J. J. Mohamed, S. D. Hutagalung, M. F. Ain, et al. Microstructure and dielectric properties of CaCu3Ti4O12 ceramic. Materials Letters, 2007, 61(8-9): 1835-1838.
[6] 仲崇成, 严顺智, 郑兴华等. 固相反应烧结法制备CCTO陶瓷[J]. 电子元件与材料, 2007, 26(11): 20-25.
[7] P. Jha, P. Arora, A. K. Ganguli. Polymeric citrate precursor route to the synthesis of the high dielectric constant oxide, CaCu3Ti4O12. Materials Letters, 2003, 57(16-17): 2443-2446.
[8] C. K. Yeoh, M. F. Ahmad, Z. A. Ahmad. Effects of Cu and Ti excess on the dielectric properties of CaCu3Ti4O12 prepared using a wet chemical method. Journal of Alloys and Compounds, 2007, 443(1-2): 155-160.
[9] B. P. Zhu, Z. Y. Wang, Y. Zhang, et al. Low temperature fabrication of the giant dielectric material CaCu3Ti4O12 by oxalate coprecipitation method. Materials Chemistry and Physics, 2009, 113(2-3): 746-748.
[10] P. Thomas, K. Dwarakanath, K.B.R. Varma, et al. Nanoparticles of the giant dielectric material, CaCu3Ti4O12 from a precursor route. Journal of Physics and Chemistry of Solids, 2008, 69(10): 2594-2604.
[11] 杨雁, 李盛涛. 共沉淀法制备CaCu3Ti4O12陶瓷[J]. 无机材料学报, 2010, 25(8): 835-839.
[12] J. J. Liu, R. W. Smith, W. N. Mei. Synthesis of the Giant Dielectric Constant Material CaCu3Ti4O12 by Wet-Chemistry Methods. Chem. Mater, 2007, 19(24): 6020-6024.
[13] K. T. Jacob, C. Shekhar, X. G. Li, et al. Gibbs energy of formation of CaCu3Ti4O12 and phase relations in the system CaO-CuO/Cu2O-TiO2. Acta Material, 2008, 56(17): 4798- 4803.
[14] B. P. Zhu, Z. Y. Wang, Y. Zhang, et al. Low temperature fabrication of the giant dielectric material CaCu3Ti4O12 by oxalate coprecipitation method. Materials Chemistry and Physics, 2009, 113(2-3): 746-748.