The surface diffusion coefficients of MgO and Al2O3 |
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| Authors: | P ?ajgalík Z Pánek M Uhrík |
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| Affiliation: | (1) Centre for Chemical Research, Slovak Academy of Sciences, Institute of Inorganic Chemistry, Dúbravská cesta 9, CS-842 36 Bratislava, Czechoslovakia |
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| Abstract: | From the measurement of neck size and neck curvature during the sintering of two spheres the surface diffusion coefficients of MgO and Al2O3 were determined. The spheres of both materials were machined from single crystals. The following values of surface diffusion coefficients were found: for MgO,D
s
s = 3.7 × 10–4 exp (407.8 kJ mol–1/RT m3 sec–1; for Al2O3,D
s
s = 1.5 × 10–2 exp (518.7 kJ mol–1/RT) m3 sec–1. |
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