Effect of nano-titania (η-TiO2) content on the mechano-physical properties of a magnesia refractory composite

Effect of titanium oxide addition on magnesia refractories

“…An addition of a few percent of titania improves the obtained materials' parameters, but when its amount exceeds 8 wt%, the refractory properties are observed to considerably deteriorate. It is consistent with the test results presented by Rodríguez et al [25], where a 5-wt% addition of TiO 2 in the form of nanopowder enabled the researchers to obtain products with maximally enhanced physical properties. The 5-wt% addition was found to result in the highest material density and compressive strength.…”

“…The influence of titania on refractory ceramic properties was also investigated by E. Rodriguez et al [25]. The researchers determined the effect of titanium nanooxide on the physical properties of refractory magnesia ceramics.…”

Improvement in thermomechanical properties of off‐grade natural magnesite by addition of Y2O3

“…Magnesia (MgO) owns various remarkable properties like high melting point, outstanding corrosion resistance against basic slag, and less hydration tendency compared to lime and dolomite which makes it suitable material for refractory applications in different areas of ferrous, nonferrous, cement industries . Refractory grades magnesia are either obtained by calcinations of magnesite minerals or synthetically derived from seawater or inland brines .…”

“…Magnesia (MgO) owns various remarkable properties like high melting point, outstanding corrosion resistance against basic slag, and less hydration tendency compared to lime and dolomite which makes it suitable material for refractory applications in different areas of ferrous, nonferrous, cement industries. [1][2][3][4][5] Refractory grades magnesia are either obtained by calcinations of magnesite minerals or synthetically derived from seawater or inland brines. 6 Major advantage of natural magnesite over seawater magnesia is the presence of lower amount of B 2 O 3 as impurity in latter, which acts as fluxing agent and drastically degrades the refractoriness of the derived products.…”

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“…This material is normally producing from calcination of diverse types of magnesium salts especially magnesite (MgCO 3 ) ores. There are two main techniques 396 MgO/impurities ratio controls final phases composition of refractory products; when the amounts of impurities are more than 2 wt.%, it results in a reduction of thermo mechanical properties such as refractoriness under load (RUL) or hot modulus of rupture (HMOR) due to the formation of low melting point phases at high working temperatures (Rodríguez et al 2016). Calcination of magnesite is also depends on the amounts of impurities, C/S ratio and silicate phases content.…”