Investigation and properties of novel low melting glasses in the ternary system Sb2O3–PbO–Me2O3

Taibi, Yasmina; Poulain, Marcel; Legouera, M.; Mebrek, Alima

doi:10.1111/ijag.16545

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…Traditionally, these glazes contain lead, which helps create a bright, vibrant finish [1][2][3]. The lead oxide (PbO) glass system is widely used for commercial purposes due to its high structural stability, low glass transfer temperature, and excellent heat and electrical properties [4][5][6]. It is also widely applied in glass ceramics, electronic devices, and thermal and mechanical sensors [7,8] because it efficiently lowers the melting point, improves wettability with oxides, and has high reflectance due to its high refractive index [9,10].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability of Lead-Free Transparent Cloisonné Glazes

2023

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Glazes of (70 − x) ZnO-30 B2O3-x Bi2O3 with different Bi2O3 contents were prepared by the conventional melt quench technique. Differential scanning calorimetry (DSC) curves were obtained to determine the glass transition temperature (Tg) and crystallization temperature (Tc) of the glazes. The activation energy of the glass transition (Eg) and crystallization (Ec) were calculated using the Moynihan and Kissinger models, respectively. The glass transition temperature (Tg) decreased linearly with increasing Bi2O3 content. This is because the larger Bi3+ ions reduced network connectivity and opened up the structure. The Tg increased gradually with increasing heating rate (β). This is because the higher heating rate provided more energy for the glass to transition to the liquid state. The activation energy of the glass transition (Eg) decreased with increasing Bi2O3 content. This indicates that the glass-forming ability of the system increased with increasing Bi2O3 content. The energy corresponding to the amorphous-to-crystalline transformation during nucleation and crystal growth (Ec) increased with increasing Bi content to about 30%, and then decreased above 40%. This suggests that higher Ec values have an advantage in preventing crystallization in the crystallization danger region. It can be seen that the addition of Bi2O3 in (70 − x) ZnO-30 B2O3-x Bi2O3 glazes affects the density and distribution of oxygen atoms in the glass structure. It can also be seen that the increased Bi content promotes the formation of Bi-O-Bi bonds, which act as network modifiers to reduce the number of non-cross-linked oxygen atoms and increase network connectivity.

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