Characterisation and thermal behaviour of a borosilicate glass

Lima, Maria Luísa; Monteiro, Regina da Conceição Corredeira

doi:10.1016/s0040-6031(01)00456-7

Cited by 73 publications

(46 citation statements)

References 15 publications

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“…The exothermic peak observed at 667 °C is attributed to crystallisation. The sharp nature of this peak, denoted as maximum crystallisation temperature (T p ), is indicative of bulk crystallisation [20][21][22]. This sharp peak was not observed for the glass AA which contained no ZrSiO 4 , so clearly the zircon is promoting bulk crystallisation.…”

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confidence: 99%

“…Compared with composition EE, no well-defined exothermic peak was observed for composition E-II (see Figure 8). Onset of a broad exothermic event occurs at approximately 650 °C and is likely associated with surface crystallisation [20][21][22][23]. Apart from the zircon-containing glass sample (EE), no sharp exothermic peaks were observed for the other glass compositions.…”

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confidence: 99%

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Thermal behaviour of zircon/zirconia-added chemically durable borosilicate porous glass

et al. 2013

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Macroporous alkali resistant glass has been developed by making additions of zirconia (ZrO 2 ) and zircon (ZrSiO 4 ) to the sodium borosilicate glass system SiO 2 -B 2 O 3 -Na 2 O. The glass was made using a traditional high temperature fusion process. Differential thermal analysis (DTA) was carried out to identify the glass transition temperature (T g ) and crystallisation temperature (T x ). Based on these findings, controlled heattreatments were implemented to separate the glass into two-phases; a silica-rich phase, and an alkali-rich borate phase. X-ray diffraction (XRD) was used to identify any crystal phases present in the as-quenched and heat-treated glasses. Fourier transform infrared (FTIR) spectroscopy also proved effective in investigating phase separation and crystallisation behaviour. After leaching, a silica-rich skeleton with an interconnected pore structure and a uniform pore distribution was observed. Pore characterisation was carried out using mercury porosimetry. The size and shape of the pores largely depended on the heattreatment temperature and time. ZrO 2 /ZrSiO 4 additions increased the alkali resistance of the porous glass 3-4 times.

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Thermal behaviour of zircon/zirconia-added chemically durable borosilicate porous glass

et al. 2013

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“…This finding has been observed elsewhere. [14][15][16] It is believed that the presence of boron could have catalyzed the recrystallization of this species at temperatures (~973 K [700°C]) slightly lower than that conventionally observed (~1273 K [1000°C]). The cristobalite peak is not found in samples heated at higher temperatures because they favor the formation of anorthite between the cristobalite-, cement-, and alumina-containing species in the refractory.…”

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confidence: 99%

“…Zinc is present in Al alloy, whereas the other phases are the result of reduction reactions. Even though spinel was formed, these samples showed good corrosion resistance in [14] (a), SiO 2 -B 2 O 3 [14] (b), Na 2 B 8 O 13 -SiO 2 [15] (c), Al-B [21] (d), Si-B [22] (e), and Mg-B [23] (f), respectively. contact with molten aluminum alloy, and the average penetration of molten metal was less than 1 mm after a long-term corrosion test (at 1123 K [850°C] for 150 hours and 1433 K (1160°C) for 75 hours.…”

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confidence: 99%

Effects of Different Boron Compounds on the Corrosion Resistance of Andalusite-Based Low-Cement Castables in Contact with Molten Al Alloy

Adabifiroozjaei

Koshy

Sorrell

2011

Metall Mater Trans B

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Interfacial reactions between Al alloy and andalusite low-cement castables (LCCs) containing 5 wt pct B 2 O 3 , B 4 C, and BN were analyzed at 1123 K and 1433 K (850°C and 1160°C) using the Alcoa cup test. The results showed that the addition of boron-containing materials led to the formation of aluminoborate (9Al 2 O 3 .2B 2 O 3 ) and glassy phase containing boron in the prefiring temperature (1373 K [1100°C]), which consequently improved the corrosion resistance of the refractories. The high heat of formation of the aluminoborate phase (which increased its stability to reactions with molten Al alloy) and the low solubility of boron in molten Al were the major factors that contributed to the improvement in the corrosion resistance of B-doped samples.

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“…In sample Z11, gahnite and quartz determinately became the main crystalline phases. The precipitation of quartz in samples may be attributed to the formation of gahnite phase, which resulted in an increase of SiO 2 content in the residual glass phases and be in favor of the precipitation of quartz in the glasses [17][18][19].…”

Section: Methodsmentioning

confidence: 99%

Sintering, crystallization and properties of MgO–Al2O3–SiO2 system glass-ceramics containing ZnO

Chen

Liu

2007

Journal of Alloys and Compounds

112

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Characterisation and thermal behaviour of a borosilicate glass

Cited by 73 publications

References 15 publications

Thermal behaviour of zircon/zirconia-added chemically durable borosilicate porous glass

Thermal behaviour of zircon/zirconia-added chemically durable borosilicate porous glass

Effects of Different Boron Compounds on the Corrosion Resistance of Andalusite-Based Low-Cement Castables in Contact with Molten Al Alloy

Sintering, crystallization and properties of MgO–Al2O3–SiO2 system glass-ceramics containing ZnO

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