Paper Title:
Sintering Kinetic of Fine α-Alumina Powder with ZrO2 Impurity
  Abstract

Sintering kinetics of the α-Al2O3 powders with average particle size 0.1 μm and ca.1% ZrO2 impurity was investigated. Several two-step sintering methods were tried, and the results were compared with the conventional (one-step) process. The temperature (<1600oC), holding time (up to 20 h), heating rate (2 oC /min to 90 oC/min), initial grain size, and porosity were controlled. The optimal results of two-step sintering, a smaller grain size (0.57 μm) and a good density (>98% TD) were achieved by heating to 1450oC, then holding at 1350oC for 20 h. The sintering mechanism was determined, belonging to lattice diffusion in the temperature region of 1400 to 1600oC. The activation energy was 688 kJ/mol, which was interpreted as a volume diffusion of Al3+ ions in polycrystalline matrix.

  Info
Periodical
Key Engineering Materials (Volumes 336-338)
Edited by
Wei Pan and Jianghong Gong
Pages
2357-2360
DOI
10.4028/www.scientific.net/KEM.336-338.2357
Citation
C. C. Lin, W. C. J. Wei, "Sintering Kinetic of Fine α-Alumina Powder with ZrO2 Impurity", Key Engineering Materials, Vols. 336-338, pp. 2357-2360, 2007
Online since
April 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Khiam Aik Khor, Yong Wan Gu, P. Cheang, F.Y.C. Boey
497
Authors: Roberta M.C. Sasahara, H.N. Yoshimura, C. Fredericci, Alberto Calasans, Paulo F. Cesar, André Luiz Molisani
Abstract:The aim of this work was to establish a route to produce pre-sintered blocks of Y-TZP (yttria stabilized tetragonal zirconia polycrystal)...
712
Authors: Hui Juan Pan, Ze Biao Zhang, Jin Hui Peng, Li Bo Zhang, Wei Li
Abstract:A microwave carbonthermal nitridation method under the condition of nitrogen at atmospheric pressure was used to the synthesis of vanadium...
1787
Authors: Ying Chun Zhang, Ze Shuang Wu, Shu Ming Wang, Xiu Juan Wan, Yan Hong Liu
Abstract:As an important solid tritium breeding ceramic material, Li2TiO3 pebbles with the diameter of 1mm are used in the breeding pebble bed for...
310
Authors: Jun Ting Luo, Chun Xiang Zhang, Hai Feng Ma, Ge Wang
Chapter 1: Mineral Materials
Abstract:The amorphous nano-sized silicon nitride powders were sintered by cold isostatic pressing –normal press sintering method. The sintering...
17