Fabrication and characterization of Ca3Co4O9 nanoparticles by sol-gel method

被引：0
作者：
Xiaoling Qi
Youyu Fan
Dongsheng Zhu
Lingke Zeng
机构：
[1] South China University of Technology,Educational Ministry’s Key Laboratory of Enhanced Heat Transfer and Energy Conservation
[2] SAE Magnetics (H.K.) Ltd,Wafer and Slider Quality Engineer Department
[3] South China University of Technology,College of Material Science and Engineering
来源：
Rare Metals | 2011年 / 30卷
关键词：
thermoelectric materials; calcium cobaltite; sol-gel method; nanoparticles;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Ca3Co4O9 nanoparticles were fabricated by using calcium nitrate and cobalt nitrate as raw materials and citric acid as complexing agent through a citrate sol-gel method. Polyethylene glycol (PEG) 1000 was added as dispersing agent with different mass ratios. Pyrolytic decomposition of the dried gel and generative process of Ca3Co4O9 were investigated by TG-DSC, XRD. The microstructures of the particles were characterized by SEM and TEM. Ca3Co4O9 particles contained plate-shaped grains with layered structure. No second phases were found in the samples which were heated in the calcined temperature range of 750–900 °C for 4 h in air. The average size of the Ca3Co4O9 particles prepared with 3% PEG 1000 calcined at 800 °C for 4 h is 30–70 nm.
引用
收藏
页码：111 / 115
页数：4
相关论文
共 129 条
  • [1] Funahashi R.(2004)Ca Appl. Phys. Lett. 85 1036-undefined
  • [2] Utata S.(1997)Bi Phys. Rev. B 56 12685-undefined
  • [3] Mizuno K.(2001)Co Jpn. J. Appl. Phys., Pt. 1 40 4644-undefined
  • [4] Kouuchi T.(2000)O Phys. Rev. B 62 166-undefined
  • [5] Mikami M.(2004)/La J. Solid State Chem. 177 3149-undefined
  • [6] Terasaki I.(2004)Bi J. Electron Spectrosc. Relat. Phenom. 137–140 595-undefined
  • [7] Saasgo Y.(2006)NiO Phys. Rev. B 73 033403-undefined
  • [8] Uchinokura K.(2009) thermoelectric devices with high output power density Phys. Rev. B 79 024109-undefined
  • [9] Fujita K.(2010)Large thermoelectric power in NaCo Appl. Phys. Lett. 96 041902-undefined
  • [10] Mochida T.(2010)O Appl. Phys. Lett. 97 062114-undefined
12345678910