Effects of blowing agent addition on the structure and properties of magnesia porous material

L. Meiting; L. Xudong; Z. Guodong; X. Zhipeng; Z. Lin; J. Hui-gang

doi:10.17073/1683-4518-2017-1-48-53

Effects of blowing agent addition on the structure and properties of magnesia porous material

L. Meiting, L. Xudong, Z. Guodong, X. Zhipeng, Z. Lin, J. Hui-gang

https://doi.org/10.17073/1683-4518-2017-1-48-53

Full Text:

Abstract

Magnesia porous material was prepared with main raw materials including of flotation tailing of magnesite, fused magnesia and additives involving sodium hexametaphosphate, sodium citrate and α-Al2O3 powder. The suspension of magnesia porous material was prepared with foaming sodium dodecyl sulfate (SDS) and foam stabilizing dextrin. Magnesia porous material was produced through the process including slip casting, curing, drying and sintering. The effects of blowing agent addition on the properties of mixed suspension, the physical performance and sectional microstructure of specimens after sintering were studied. The results showed that the tested suspension was the pseudoplastic fluid. With the increment of the blowing agent content, the apparent porosity of sintered specimens increased, and the thermal conductivity decreased. The presence of local agglomerates became less and smaller, the pore size increased, and the size of grains and distribution of pores became more uniform. Ill. 5. Ref. 17. Tab. 3.

Keywords

magnesite flotation tailings, magnesite porous materials, blowing agent, pseudoplastic behavior,

About the Authors

L. Meiting

Ляонинский технологический университет, факультет высокотемпературных материалов и магнезиальных ресурсов
China

L. Xudong

Ляонинский технологический университет, факультет высокотемпературных материалов и магнезиальных ресурсов, Университет Цинхуа
China

Z. Guodong

China

X. Zhipeng

Университет Цинхуа
China

Z. Lin

Керамический институт Цзиндэчжэнь
China

J. Hui-gang

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Supplementary files

For citation: Meiting L., Xudong L., Guodong Z., Zhipeng X., Lin Z., Hui-gang J. Effects of blowing agent addition on the structure and properties of magnesia porous material. NOVYE OGNEUPORY (NEW REFRACTORIES). 2017;(1):48-53. https://doi.org/10.17073/1683-4518-2017-1-48-53

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