THE EFFECT OF NANO-ALUMINA ADDITION ON THE PROPERTIES OF HIGH-ALUMINA LOW-CEMENT SELF-FLOWING REFRACTORY CASTABLES

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BADIEE H.; JAMSHIDI B.; MANAFI S.

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Paper Information

Journal: JOURNAL OF NEW MATERIALS Year:2017 | Volume:8 | Issue:1 (29) Page(s): 29-42

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Title

THE EFFECT OF NANO-ALUMINA ADDITION ON THE PROPERTIES OF HIGH-ALUMINA LOW-CEMENT SELF-FLOWING REFRACTORY CASTABLES

Author(s)

BADIEE H. | JAMSHIDI B. | MANAFI S. | Issue Writer Certificate

Keywords

CASTABLE REFRACTORYQ1

HIBONITEQ2

LOW-CEMENTQ2

NANO-ALUMINAQ2

SELF-FLOWQ1

Abstract

In this study, the effect of NANO-ALUMINA addition on the properties of high-alumina LOW-CEMENT SELF-FLOWing refractory castables was studied. For this reason, the reactive alumina in the refractory castable composition was substituted by NANO-ALUMINA powder. Then, the SELF-FLOW characteristics such as; SELF-FLOW value and working time of high-alumina LOW-CEMENT refractory castables were studied. Besides, the physical and mechanical properties, phase composition and microstructure of these refractory castables were studied after drying at 110oC and firing at 1250 and 1450oC. The results showed that the NANO-ALUMINA addition has a great effect on the SELF-FLOW characteristics and mechanical strength of these refractory castables. With addition of NANO-ALUMINA particles, the SELF-FLOW value and working time tends to decrease due to high surface area of NANO-ALUMINA particles. By use of 1 wt.% NANO-ALUMINA content in the castable composition, the alumina SELF-FLOWing castable with adequate working time can be obtained according to standard values of SELF-FLOWing castables. The decrease in porosity and, increase in mechanical strengths after drying is obtained by adding NANO-ALUMINA. The phase analysis and microstructure evaluations showed that CA6 phase can be form at lower temperatures (1250oC) with the addition of NANO-ALUMINA. CA6 platy formation leads to increase of porosity in the microstructure. But, the because of bonding behavior of platy CA6, the mechanical strengths are considerably increased after firing.

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References

MICROSTRUCTURE AND PROPERTIES OF INSITU SPINEL REFRACTORY CASTABLE CONTAINING ZRSIO4

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APA: Copy

BADIEE, H., JAMSHIDI, B., & MANAFI, S.. (2017). THE EFFECT OF NANO-ALUMINA ADDITION ON THE PROPERTIES OF HIGH-ALUMINA LOW-CEMENT SELF-FLOWING REFRACTORY CASTABLES. JOURNAL OF NEW MATERIALS, 8(1 (29) ), 29-42. SID. https://sid.ir/paper/169835/en

Vancouver: Copy

BADIEE H., JAMSHIDI B., MANAFI S.. THE EFFECT OF NANO-ALUMINA ADDITION ON THE PROPERTIES OF HIGH-ALUMINA LOW-CEMENT SELF-FLOWING REFRACTORY CASTABLES. JOURNAL OF NEW MATERIALS[Internet]. 2017;8(1 (29) ):29-42. Available from: https://sid.ir/paper/169835/en

IEEE: Copy

H. BADIEE, B. JAMSHIDI, and S. MANAFI, “THE EFFECT OF NANO-ALUMINA ADDITION ON THE PROPERTIES OF HIGH-ALUMINA LOW-CEMENT SELF-FLOWING REFRACTORY CASTABLES,” JOURNAL OF NEW MATERIALS, vol. 8, no. 1 (29) , pp. 29–42, 2017, [Online]. Available: https://sid.ir/paper/169835/en

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