TY - JOUR
T1 - XRD investigation of metastable phase formation in Li2O-2SiO2 glass
AU - Burgner, Lori L.
AU - Weinberg, Michael C.
AU - Lucas, Pierre
AU - Soares, Paulo C.
AU - Zanotto, Edgar D.
N1 - Funding Information:
M.C.W. wishes to extend his appreciation to the Office of Basic Energy Sciences of the US Department of Energy for partial support of this work. E.D.Z. thanks FAPESP and PRONEX for financial support of this work.
PY - 1999/10/1
Y1 - 1999/10/1
N2 - Metastable crystal phase formation in lithium disilicate glass has been a subject of controversy for many years. However, recent evidence mainly obtained via the use of electron microscopy has provided strong evidence for formation of metastable phases during the early stages of crystallization in this composition. Very recently, however, a study has appeared which suggests that these metastable phases are long-lived and can be detected with the aid of XRD. Here, we present XRD results obtained for lithium disilicate glasses which were heated for various time periods at several temperatures in the nucleation regime. In no case do we find any evidence for metastable phase formation. Possible causes for the discrepancy between the present and previous experimental results are discussed.
AB - Metastable crystal phase formation in lithium disilicate glass has been a subject of controversy for many years. However, recent evidence mainly obtained via the use of electron microscopy has provided strong evidence for formation of metastable phases during the early stages of crystallization in this composition. Very recently, however, a study has appeared which suggests that these metastable phases are long-lived and can be detected with the aid of XRD. Here, we present XRD results obtained for lithium disilicate glasses which were heated for various time periods at several temperatures in the nucleation regime. In no case do we find any evidence for metastable phase formation. Possible causes for the discrepancy between the present and previous experimental results are discussed.
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U2 - 10.1016/S0022-3093(99)00376-2
DO - 10.1016/S0022-3093(99)00376-2
M3 - Article
AN - SCOPUS:0032685586
VL - 255
SP - 264
EP - 268
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
IS - 2
ER -