Effect of mullite formation on properties of refractory castables

Effect of CaF2 on Interfacial Phenomena of High Alumina Refractories with Al Alloy

“…[26] However, anorthite when present as a glassy phase is known to increase the corrosion of refractories. [31] Thus, the role of CaF 2 and anorthite in the mechanisms of interfacial reaction kinetics is not completely understood, especially for high alumina (>80 wt pct) refractories.…”

Influence of sintering temperature on low level laser (LLL) destruction of low cement high alumina refractory concrete

“…All fractions of matrix components lesser than 45 lm constitute 35% of concrete mixture. Optimum particle packing, and therefore maximum density and sufficient porosity, that allows concrete flowing and placing with slight water addition are achieved by adjustment of the particle size distribution to the theoretical curve based on the modified Andreassen's packing model, with the distribution coefficient (q) of 0.25, maximum grain size of 5 mm, continuous particle size distributions and dry mixture density of 3.75 g/cm 3 .…”

“…In order to produce material with high homogeneity of powder mixture, it is important to define an appropriate processing procedure [1][2][3][4][5][6][7]. The following procedure was adopted in this research.…”

“…At temperatures over 1500°C mechanical strength is higher, which can be related to the formation of CA 6 phase. However, these sintering temperatures (over 1500°C) are not favorable in cases where thermal shock stability is required, since explosive breakage is possible, and thermal resistance is lower for the samples sintered at 1600°C than for the samples sintered at 1300°C [1][2][3][4][5][6][7][8][16][17][18][19][20].…”

“…Defects or flaws deploy randomly throughout the structure inducing the variations in values of measured properties. If the refractory concrete exposes to the mechanical loads, sudden temperature changes, abrasion, corrosion resistance testing, wear resistance testing, effects of slag and melted metal during the service, already presented defects grow until reaching the critical level inducing the degradation of material properties and eventually breaking of the bulk [1][2][3][4][5][6][7]. Investigations related to different types of concretes, mostly reinforced using various reinforcements, were focused on studying effects of lateral load, static tests, tension stiffening [8][9][10][11][12], while some papers dealt with the laser machining of structural ceramics [12].…”