Test Methods for Cold Crushing Strength and Modulus of Rupture of Refractories

10.1520/c0133 ◽  
2008 ◽  
Author(s):  
Keyword(s):  
Test Methods ◽  
Modulus Of Rupture ◽  
Crushing Strength ◽  
Cold Crushing Strength

scholarly journals Magnesia-zircon brick: Evolution of microstructure, properties and performance with increasing sintering temperature

2013 ◽  
Vol 45 (2) ◽  
pp. 181-188
Author(s):  
J. Gao ◽  
Z. Guo ◽  
L. Wang ◽  
W. Jiang
Keyword(s):  
Bulk Density ◽  
Microstructural Evolution ◽  
Creep Resistance ◽  
Sintering Temperature ◽  
Modulus Of Rupture ◽  
Crushing Strength ◽  
Cold Crushing Strength ◽  
And Performance ◽  
Evolution Of Microstructure ◽  
Font Color

Depending on phase components and densification, Magnesia-Zircon brick varies in appearance from white to veined and then brown with increasing sintering temperature. Properties including bulk density, apparent porosity and hot modulus of rupture as well as performance embodied with creep resistance and refractoriness continue to improve with sustaining enhancement of sintering temperature. Exceptionally, cold crushing strength first increases then decreases with rising sintering temperature and a peak exists at 1550oC. Microstructural evolution suffers zircon decomposition companying by silica escape, forsterite formation, matrix solidification and zirconia coagulation, until a zirconia/forsterite composites belt tightly coating on magnesia aggregates. Excessive coagulation of zirconia caused by oversintering probably results in microcracks formation and defects enlargement thereby degrades cold crushing strength.<br><br><font color="red"><b> This article has been retracted. Link to the retraction <u><a href="http://dx.doi.org/10.2298/SOS1303387E">10.2298/SOS1303387E</a><u></b></font>

β-SiAlON Bonded Corundum Material and Its Application as Sliding Gate Plate for Continuous Casting

2007 ◽  
Vol 280-283 ◽  
pp. 1683-1686 ◽  
Author(s):  
Bo Quan Zhu ◽  
Xiang Cheng Li ◽  
Cong Jin Jin ◽  
Zeya Li ◽  
Shou Xin Tian
Keyword(s):  
Mechanical Properties ◽  
Oxidation Process ◽  
Raw Materials ◽  
Protective Layer ◽  
Modulus Of Rupture ◽  
Crushing Strength ◽  
Good Oxidation Resistance ◽  
Cold Crushing Strength ◽  
Gate Plate ◽  
Z Value

β-sialon bonded corundum-based sliding gate plate was developed from raw materials of Al, metallic silicon and alumina through nitriding-reaction process. It was found that the effects of β-sialon content on the physical properties are significant and the mechanical properties of developed sliding gate plate are strongly related to the Z-value. The materials with Z value of 2 and 20wt% β-sialon, exhibit the highest hot modulus of rupture and cold crushing strength. It was also found that sialon bonded corundum-based material has good oxidation resistance because a protective layer is formed during oxidation process.

Investigation on Al-Cr2O3-Al2O3 Sliding Gate Performance

2012 ◽  
Vol 466-467 ◽  
pp. 242-245
Author(s):  
Jun Jie Zhang ◽  
Yong Li ◽  
Jin Bao Li ◽  
Yuan Gao ◽  
Gong Dong Ma
Keyword(s):  
Mechanical Properties ◽  
Chromium Oxide ◽  
Aluminum Powder ◽  
High Performance ◽  
Phenolic Resin ◽  
Oxide Powder ◽  
Modulus Of Rupture ◽  
Crushing Strength ◽  
Cold Crushing Strength ◽  
Different Content

High performance Al-Cr2O3-Al2O3 sliding gate are made from tabular corundum, white fused corundum, aluminum powder, and chromium oxide powder. Phenolic resin is used as binder. The properties of the Al-Cr2O3-Al2O3 sliding gates with the different content of chromium oxide(mass percent 3%,6%,9%,12%,15%) which are made from different processes (dried at 200°C in air, fired at 1300°Cin N2 and fired at 1450°C in CO), are researched respectively. The results show that in different processes, the samples which contain 6% chromium oxide powder have higher cold crushing strength and hot modulus of rupture. After fired in N2, the new phases Al8Cr5 (1327°C), AlN are formed, and after fired in CO, Al8Cr5, Al2OC and Cr3C2 are formed. These materials are contributed to improve the mechanical properties of samples. The samples fired in N2 have the best performance.

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