Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7921156 | Materials Chemistry and Physics | 2018 | 19 Pages |
Abstract
LuBa3B9O18 borate was prepared using a high-temperature solid-state synthesis. The crystal structure, as in the cases of α- and β-BaB2O4, is composed of isolated rigid B3O6 groups. For the first time, its thermal behavior was investigated by high-temperature X-ray powder diffraction (HTXRD) within the temperature range of 20-980â¯Â°C. The LuBa3B9O18 structure expands highly anisotropically. As the temperature increases, the degree of anisotropy decreases (αmax/αminâ¯=â¯9â¯at 25â¯Â°C and 6â¯at 800â¯Â°C) and the coefficient of volume expansion increases from 38.9 to 54.1â¯Ãâ¯10â6â¯Câ1, respectively. A comparative analysis of the nature of thermal deformations of the three borates under consideration was conducted.
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Authors
Y.P. Biryukov, R.S. Bubnova, S.K. Filatov, V.L. Ugolkov,