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Surface Diffusivity under High‐Pressure Gas
Author(s) -
Nanko Makoto,
Ishizaki Kozo,
Fujikawa Takao,
Kondo Yoshihito
Publication year - 1995
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1995.tb08873.x
Subject(s) - thermal diffusivity , materials science , sintering , diffusion , surface diffusion , gas pressure , high pressure , gaseous diffusion , composite material , mineralogy , thermodynamics , chemistry , geology , petroleum engineering , adsorption , physics , electrode
The sintering behavior of TiO 2 under high‐pressure gas (100 MPa) was studied with respect to densification rate, decreasing rate of specific surface area, and narrowing rate of pore size distribution. At the low sintering temperature (800°C) used in this study, the densification rate under high‐ pressure gas was similar to that under low (i.e., 1 atm) pressure. The specific surface area decreased and the pore size distribution narrowed at a faster rate under high‐ pressure gas than under low‐pressure gas. These results imply that high‐pressure gas enhances surface diffusion.