| The Formation of a New Phase during Crystallization of
TiO2-Doped Nd2O3-Al2O3-SiO2 Glasses |
Saeid Baghshahi,a, * Charles Christopher Sorrell,b Michael Paul Brungsc and Hyung Sun Kimd
Pages : 22-29
DOI : 10.1080/0371750X.2022.2044382 |
| Abstract |
| Glasses with the general compositions xNd2O3.20Al2O3.(80–x)SiO2 and
15Nd2O3.yAl2O3.(85–y)SiO2 (x = 10, 15, 20, and y = 20, 25, 30) were prepared by melting
at 1550oC. The glasses also contained varying amounts of TiO2 as nucleating agent.
The microstructural evolution of the undoped and TiO2-containing glass-ceramics was
then studied. Crystallization of the glasses was feasible in the range 1000o to 1250oC.
The crystallization rates were evaluated. TiO2 addition influenced only the growth rate
and not the nucleation of the crystalline phases observed in this study. Glasses of
higher SiO2 content showed a rise in growth rate. It was found that when TiO2 was
present, a new unreported crystalline compound with the stoichiometric composition
of TiO2.Nd2O3.Al2O3.2SiO2 was formed
[Keywords: Rare earth oxides, Glass-ceramics, Crystallization, Nucleating agent] |
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