Functional composites based on refractories produced by pressure slip casting
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- 作者：Stefan Schaffö ; ner ; stefan.schaffoener@ikgb.tu-freiberg.de" class="auth_mail" title="E-mail the corresponding author ; Lisa Freitag ; Jana Hubá ; lková ; Christos G. Aneziris
- 关键词：Refractories ; Composites ; Pressure slip casting ; X-ray computed tomography ; Spinels
- 刊名：Journal of the European Ceramic Society
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：36
- 期：8
- 页码：2109-2117
- 全文大小：2549 K
文摘
The present study investigates the sequential pressure filtration of two filter cake layers with a maximum grain size of 3 mm and 1 mm, respectively, using a water soluble additive system consisting of xanthan and guar gum. The pressure slip casting of the resulting composites was optimized with a factorial experimental design. The best combination was a lower filtration pressure for the first filter cake layer and a higher filtration pressure for the second one. Furthermore, a shorter filtration time of the first filter cake layer together with the application of a filter aid of a xanthan/guar gum solution resulted in an easy demolding of crack-free graded composites with an excellent bonding. The results of the full factorial experimental design were verified by X-ray computed tomography. The demonstrated pressure slip casting of graded refractories offers the possibility to produce functional composites with tailored compositions, microstructure and thus functionality.