Effect of TiO2 on the mullite formation and mechanical properties of alumina porcelain

Porcelain containing anatase and rutile nanocrystals

“…The partial dissolution of TiO 2 into the glassy phase occurs as soon as the melting of feldspar grains becomes significant above 1200 1C [25]. This lowers the glassy phase viscosity and modifies the kinetic of the dissolutionrecrystallization process of new phases.…”

Fluxing action of illite and microcline in a triaxial porcelain body

“…In good agreement, a recent study by Montoya et al showed that improvement of mechanical properties could be associated with an increase of both specimen density and relative content of secondary mullite. 6 In addition, adverse effect of residual quartz to mechanical properties of the fired bodies due to the ␣ → ␤ transformation during cooling was addressed. 21 Our XRD results showed that residual quartz amount in the IT0-bodies was less than that found in the ST0-bodies and this could be another factor negatively affecting the fired strength of ST0-bodies.…”

“…3 These mullites were distinguished by different morphologies and compositions. 6 Small needle-like structure and interlocking of mullite crystals were proposed to be the key factor for achieving high strength porcelains. 7 Clarification on the formation of mullites will lead to a better body formulation and firing scheme, improved microstructure and hence mechanical properties of ceramic products.…”

The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse

“…5, and hence has greater extent of hydrated bonding at 800 ˚C and thus shows higher values of strength. Some works have reported that with temperature and microsilica content increase in LCC and ULCC refractories, mullite formation (needle structure) increases significantly and it leads to an improvement of the strength at high temperatures [25][26][27][28][29][30]. Also, the addition of andalusite and kyanite materials to LCC and ULCC refractories increases the refractory strength at high temperature [25].…”