论文信息 - Study of Gadolinium-doped cerium oxide by XRD, TG-DTA, impedance analysis, and positron lifetime spectroscopy

Study of Gadolinium-doped cerium oxide by XRD, TG-DTA, impedance analysis, and positron lifetime spectroscopy

X-ray diffraction, thermogravimetry differential thermal analysis, impedance analysis, and positron lifetime spectroscopy were conducted for Gadolinium-doped cerium oxides (GDC) prepared using oxalate coprecipitation method. XRD revealed the fluorite structure indicating that gadolinium is successfully doped into cerium oxide. Prior to sintering, the vacancy-sized free volume and nanovoid were observed at grain boundaries. The vacancy-sized free volumes shrank with increasing sintering temperatures and finally got dominant.

Kiminori Sato | K. Sato | T. Kosaka | S. Ohta

[1] A. K. Tyagi,et al. Synthesis of nanocrystalline Gd doped ceria by combustion technique , 2009 .

[2] N. Matsunaga,et al. Grain size dependence of electrical properties of Gd-doped ceria , 2008 .

[3] J. Kuriplach,et al. Defects in yttria‐stabilised zirconia: a positron annihilation study , 2007 .

[4] H. Park,et al. The effect of alumina addition on the electrical conductivity of Gd-doped ceria , 2006 .

[5] S. Chan,et al. Effect of transition metal oxides on densification and electrical properties of Si-containing Ce0.8Gd0.2O2−δ ceramics , 2004 .

[6] K. Furuya,et al. Structure and chemical changes of CeO2 irradiated with hydrogen ions , 2002 .

[7] H. Ono,et al. Electrical Conductivity and Diffusion of Oxygen Ions in Rare-Earth-Doped Ceria , 2000 .

[8] B. Kieback,et al. Review Positron annihilation in fine-grained materials and fine powders—an application to the sintering of metal powders , 1999 .

[9] Y. Hirata,et al. Characterization of Rare Earth-Doped Ceria Powders Dervied from Oxalate Coprecipitate , 1998 .

[10] Peter Kirkegaard,et al. Positronfit Extended: A New Version of a Program for Analysing Positron Lifetime Spectra , 1984 .