The aim of this work is to measure the hydrogen transport and solubility parameters in the commercial alumina. Measurements are conducted using a time-dependent permeation method over the temperature range 1273-1673 K with hydrogen driving pressures in the range 104-105 Pa (100-1000 mbar). A half-power pressure dependence (diffusion-limited permeation) of the permeation flux for alumina is observed. The Arrhenius expressions for the hydrogen permeability, diffusivity, and Sieverts' constant values obtained from a fitting to the whole temperature range are as follows: P = 3.3 · 10-10 exp(-97420/RT) mol · m-1 · s -1 · Pa-1/2 D = 9.7 · 10-8 exp(-79990/RT) m2 · s-1 Ks = 5.5 ·10-3 exp(-22540/RT) mol · m-3 · Pa-1/2.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry