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Journal of Materials Science

, Volume 27, Issue 1, pp 63–67 | Cite as

Effects of organic binders on the sintering of isostatically compacted zirconia powders

  • J. Wang
  • S. H. P. Li
  • R. Stevens
Papers

Abstract

Certain processing-related flaws in cold isostatically pressed ceramic powder compacts may arise from the delayed burn-out of organic binders until the sintering temperature is approached, although the isostatic compaction technique usually gives a higher and much more uniform green density than the conventional die compaction technique. For the 3 mol% Y2O3-doped zirconia powder in which 3 wt% PEG 1500 was introduced, the sintered density and sintering shrinkage were found to decrease in a near linear manner with increasing isostatic compaction pressure. The processing-related defects were identified as intergranular pores (1–5 μm). It is considered that these processing-related defects are a consequence of incomplete organic burn-out at low and intermediate temperatures in the heating-up period and the swelling of intergranular pores associated with the burn-out of residual organic binders at temperatures close to the sintering temperature. A higher calcination temperature and an extended calcination dwell time may be required to eliminate the organic residuals in the isostatically pressed ceramic powder compacts than in the conventional die-pressed samples.

Keywords

Calcination Sinter Temperature Calcination Temperature Compaction Pressure Sintered Density 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • J. Wang
    • 1
  • S. H. P. Li
    • 2
  • R. Stevens
    • 2
  1. 1.IRC in Materials for High Performance ApplicationsThe University of BirminghamBirminghamUK
  2. 2.School of MaterialsThe University of LeedsLeedsUK

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