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Journal of Materials Science

, Volume 44, Issue 3, pp 689–699 | Cite as

Pore evolution model of ceramic membrane during constrained sintering

  • Minghui Qiu
  • Jun Feng
  • Yiqun Fan
  • Nanping Xu
Article

Abstract

Pore size has been found to strongly depend on the sintering program in the preparation of porous ceramic membranes. In this paper, a model was developed to predict the variation in pore size and porosity of membranes during the sintering process. A comparison of shrinkage characteristics was made between the sintering processes of supported membranes and unsupported membranes. For supported membranes, the effect of restriction coming from a rigid substrate on the sintering behavior has been taken into account in the calculation. It is predicted that the pore size increases in supported membranes and decreases in unsupported membranes as the sintering temperature is increased. Calculations also showed that the loss of porosity in the supported membranes was less than that in the unsupported membranes. In order to verify reliability of this model, unsupported and supported membranes were prepared with α-Al2O3 powders at the sintering temperatures ranging from 1125 °C to 1325 °C. The pore size and porosity were measured by gas permeation technique and Archimedes’s method. The experimental results for the unsupported and supported α-Al2O3 membranes showed a good agreement with those calculated from the model. Therefore, this model provides an effective tool in predicting the porosity and the pore size of ceramic membranes at the different sintering temperatures.

Keywords

Shrinkage Sinter Temperature Sinter Process Ceramic Membrane Shrinkage Rate 

Notes

Acknowledgements

This work was supported by the National Basic Research Program of China (No. 2009CB623400) and the National Nature Science Foundation of China (No. 20436030).

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical EngineeringNanjing University of TechnologyNanjingChina

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