Influence of nanoAl2O3 Powder on the Properties of Microporous Corundum Aggregates

Lv Ping Fu; Hua Zhi Gu; Zheng Kun Li; Xiang Yu Yan

doi:10.4028/www.scientific.net/AMR.881-883.1040

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 881-883Influence of nanoAl2O3 Powder on the Properties of...

Influence of nanoAl₂O₃ Powder on the Properties of Microporous Corundum Aggregates

Abstract:

With Al₂O₃ micro-powder as main raw material, a kind of microporous corundum aggregate was prepared by adding nanoAl₂O₃ powder. Effect of nanoAl₂O₃ powder on the properties of microporous corundum aggregates and its sintering mechanism were studied. The results show that, the closed porosity of sinter is too low when adding too less nanoAl₂O₃ powder; however, excessive nanoAl₂O₃ powder would lead to the separation of grain boundary and pores during the sintering process, partial crystal grow up abnormally, the relative density of sinter reduces. Microporous corundum aggregate with 5.2% apparent porosity and 9.2% closed porosity can be obtained with 3wt% nanoAl₂O₃ powder in this study.

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Periodical:

Advanced Materials Research (Volumes 881-883)

Pages:

1040-1044

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.881-883.1040

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Online since:

January 2014

Authors:

Lv Ping Fu, Hua Zhi Gu*, Zheng Kun Li, Xiang Yu Yan

Keywords:

Corundum, Microporous Aggregates, NanoAl₂O₃ Powder, Property, Sintering

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