arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0706.3402cond-mat.mtrl-scicond-mat.other
收藏

体扩散限制气体释放过程的扩散动力学参数

Diffusion kinetic parameters from bulk diffusion limited gas release processes

Ricardo E. Avila

摘要:

大量吸收的气体物种的球形卵石的扩散进行了研究分析,强调有用的时间积分的扩散系数分析的任意温度实验。高精度的近似值引入的解析表达式的数值计算需要相当长的时间。提出了一种从单一线性升温过程中提取扩散动力学参数的方法,即扩散系数的激活能和相应的指前因子与球形卵石半径的比值。

英文摘要:

The diffusion of a bulk absorbed gas species out of spherical pebbles is studied analytically, stressing the usefulness of the time integral of the diffusion coefficient for analysis of arbitrary temperature schedule experiments. Highly accurate approximations are introduced where the numeric evaluation of the analytic expressions takes considerable time. A method is proposed to extract the diffusion kinetic parameters from a single linear heating ramp, namely, the activation energy of the diffusion coefficient and the ratio of the corresponding preexponential factor to the radius of spherical pebbles.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑