2019
DOI: 10.1111/ijag.13874
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Development of magnesium‐aluminum‐silicate glass‐ceramics nucleated with Nb2O5

Abstract: The influence of nucleating agents and heat‐treatments on magnesium‐aluminum‐silicate (MAS) glass‐ceramics was studied. MAS precursor glasses were melted in oxidant (air) and reducing atmospheres. Nb2O5, MoO3 and TiO2+ZrO2 were added as nucleating agents at the same molar proportion (1.0%). MAS glass‐ceramics nucleated with Nb2O5 are strike face candidates for security windows when relevant outputs are taken into account, such as transparency, crack resistance, hardness and feasibility. Nb2O5‐doped MAS can ach… Show more

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Cited by 10 publications
(4 citation statements)
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“…A common conclusion from these studies is that the Vickers hardness ( H V ) increased with an increasing volume fraction of crystals within the microstructure 19,20 . Some works have measured the H K in addition to the H V , consistently observing that the H K values were lower than the H V values, which is consistent with other materials 21,22 . In addition to the systems previously mentioned, hardness values have been acquired on lithium disilicate (LD) systems using either the nanoindentation 23 or Vickers microindentation 24 .…”
Section: Introductionmentioning
confidence: 64%
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“…A common conclusion from these studies is that the Vickers hardness ( H V ) increased with an increasing volume fraction of crystals within the microstructure 19,20 . Some works have measured the H K in addition to the H V , consistently observing that the H K values were lower than the H V values, which is consistent with other materials 21,22 . In addition to the systems previously mentioned, hardness values have been acquired on lithium disilicate (LD) systems using either the nanoindentation 23 or Vickers microindentation 24 .…”
Section: Introductionmentioning
confidence: 64%
“…19,20 Some works have measured the H K in addition to the H V , consistently observing that the H K values were lower than the H V values, which is consistent with other materials. 21,22 In addition to the systems previously mentioned, hardness values have been acquired on lithium disilicate (LD) systems using either the nanoindentation 23 or Vickers microindentation. 24 To our knowledge, our previous work 4 was the first to measure H K on an LD system, and our system contained lithium tantalate (LT) as a secondary phase.…”
Section: Introductionmentioning
confidence: 99%
“…The crystalline peaks shown in Fig. 2 15 During the heat-treatment, Mg 2+ and F À ions tend to form MgF 2 precipitates at B600-650 1C. 16 The tiny particles of MgF 2 then mix with magnesium silicates to form the additive compound i.e., norbergite crystallites.…”
Section: Resultsmentioning
confidence: 99%
“…2) is associated with the crystallite size and high concentration of the fluorophlogopite phase. 15,17 Mica belongs to the monoclinic system with the co-existence of several types of atoms, where the volume fraction, crystallinity and grain size of the crystalline phase is controlled by the heat-treatment as well as the doping agents. 5,17 In the present report, the controlled nucleation in the SiO 2 -MgO-Al 2 O 3 -B 2 O 3 -K 2 O-MgF 2 glass is performed under two selected parameters: (i) heat-treatment at 950 1C for 2 h and (ii) the addition of 5 mol% Sm 2 O 3 and Gd 2 O 3 .…”
Section: Resultsmentioning
confidence: 99%