Influence of Contents of Pre-Synthesized Spinel on the Microstructures and Mechanical Properties of the Lightweight Corundum-Spinel Refractory Castables

Qing Jie Chen; Wen Yan; Nan Li; Xiao Li Lin; Wen Ying Zhou; Luo Wang

doi:10.4028/www.scientific.net/KEM.697.586

Paper Titles

Phase Equilibria in the BaO-SiO₂-Al₂O₃ Ternary System at 1500 °C
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Nitridation Isothermal Kinetics of In Situ β-Sialon Bonded Al₂O₃-C Refractories
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Effects of Al Content on the Phase Constitution of Aluminum-Periclase Composites at 1600°C in N₂
p.576

Effect of Spinel Content on the Reaction of Porous Periclase-Spinel Ceramics and Cement Clinker
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Influence of Contents of Pre-Synthesized Spinel on the Microstructures and Mechanical Properties of the Lightweight Corundum-Spinel Refractory Castables
p.586

Effect of Sintering Temperature on the Physical Properties and Microstructure of In Situ Nitrides Bonded MgAl₂O₄-C Refractories
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Effect of Particle Size Distribution of Raw Materials on Properties of Magnesia-Alumina Refractory
p.595

Preparation and Properties of Lightweight, High-Strength Insulation Materials Using Fly Ash Floating Beads
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Effect of Zircon Content on the Microstructure and Physical Properties of Chamotte Refractories
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 697Influence of Contents of Pre-Synthesized Spinel on...

Influence of Contents of Pre-Synthesized Spinel on the Microstructures and Mechanical Properties of the Lightweight Corundum-Spinel Refractory Castables

Abstract:

Five kinds of lightweight refractory castables were prepared by using lightweight corundum-spinel aggregates (LCSA), pre-synthesized spinel (PSS), magnesia and corundum powders as raw materials. Effects of the PSS contents on the microstructures and mechanical properties of the refractory castables were studied by means of X-ray diffractometer (XRD), elastic modulus tester and scanning electron microscopy (SEM), etc. It is found that with the PPS content increase from 0 to 15.3 wt %, the permanent linear change (PLC) of castables sintered at 1600 °C decreases from 1.02% to -0.56%; the bulk density (BD) and apparent porosity (AP) are in the range of 29.6 %~27.8 % and 2.71~2.79 g/cm³, respectively, changing a little; the cold compressive strength (CCS) decreases from 106.0 MPa to 94.4 MPa; the thermal shock resistance improves; the hot modulus of rupture (HMOR) decreases from 6.7 MPa to 4.3 MPa. Considering these aspects, sample with 7.6 wt% PPS (LA7.6) has the best performance.

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Periodical:

Key Engineering Materials (Volume 697)

Pages:

586-590

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.697.586

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Online since:

July 2016

Authors:

Qing Jie Chen, Wen Yan*, Nan Li, Xiao Li Lin, Wen Ying Zhou, Luo Wang

Keywords:

Lightweight Refractory Castables, Mechanical Properties, Microstructure, Porous Corundum-Spinel Aggregate, Pre-Synthesized Spinel

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