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Electrical conductivity of sol-gel derived nano- 8mol% yttria stabilized zirconia

P. GANESH BABU1,2,* , K. RAVICHANDRAN3, P. MANOHAR2

Affiliation

  1. Department of Physics, Sri Ramanujar Engineering College, Kolappakkam, Chennai-600 048, India
  2. Department of Ceramic Technology, A. C. Tech Campus, Anna University, Chennai, 600025, India
  3. Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai, 600025, India

Abstract

Nanosized 8mol% Yttria Stabilized zirconia (8YSZ) was prepared by the sol-gel technique. The calcination temperature of the gel powder was optimized to be around 600ºC by the Thermo Gravimetric (TG) and Differential Thermal Analyses (DTA). The calcined powder was ground in a planetary mill in ethanol medium and dried at 60ºC. Powder X-ray Diffraction (XRD), Selected Area Electron Diffraction (SAED) and Transmission Electron Microscopy analyses (TEM) of the grounded sample was confirmed to be nanosized (15 nm) and cubical in structure. The nano sized 8YSZ powder sample was pelletized by adding polyvinyl alcohol as binder and sintered in a microwave furnace at 1500ºC for 15 minutes of dwelling time. The electrical conductivity and activation energy have been evaluated by a two probe A.C impedance analyser. From this study the activation energy 1.20 eV, and the electrical conductivity 1.55x10-3 Ω-1cm-1of the microwave sintered 8YSZ were estimated..

Keywords

Nano 8 mol % yttria stabilized zirconia, Sol-gel, Microwave sintering, Electrical conductivity.

Citation

P. GANESH BABU, K. RAVICHANDRAN, P. MANOHAR, Electrical conductivity of sol-gel derived nano- 8mol% yttria stabilized zirconia, Optoelectronics and Advanced Materials - Rapid Communications, 7, 9-10, September-October 2013, pp.654-658 (2013).

Submitted at: March 22, 2013

Accepted at: Sept. 18, 2013