OSTWALD RIPENING OF PRECIPITATES
OSTWALD RIPENING OF PRECIPITATES
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DOI：
10.1016/0001-8686(75)85001-9
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发表时间：
1975-01-01
影响因子：
15.6
通讯作者：
KAHLWEIT, M
中科院分区：
文献类型：
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作者：
KAHLWEIT, M
I.从过饱和母相中沉淀物质的动力学由三个过程的相互作用决定：（1）i）颗粒的成核，ii）它们的生长动力学，和iii）沉淀物的奥斯特瓦尔德熟化。虽然成核动力学和颗粒生长动力学在本世纪的前半叶至少在原理上得到澄清，但奥斯特瓦尔德熟化理论直到1961年才由利夫希茨和斯廖佐夫（2）以及瓦格纳（3）独立地发展起来。稍微不同的是，两种计算都导致预测，具有扩散控制的颗粒生长的多分散沉淀物的长时间行为应渐近地接近Y→ 1/T和r→（3/2）rm In，其中3 Y= r和1/τ=（8/9）（DY v c./ VRT）* n m
I. Introduction The kinetics of precipitation of a substance from a supersaturated parent phase is governed by the interplay of three processes (1) i) the nucleation of the particles ii) their growth kinetics, and iii) the Ostwald ripening of the precipitate. While the kinetics of nucleation as well as that of the growth of the particles was, at least in principle, clarified in the first half of this century, the theory of Ostwald ripening was developed only in 1961 by Lifshitz and Slyozov (2) and, independently, by Wagner (3). Proceeding somewhat differently, both calculations led to the prediction that the long time behavior of a polydisperse precipitate with diffusion controlled growth of the particles should asymptotically approach Y→ 1/T and r→(3/2) r m In with 3 Y= r and 1/τ=(8/9)(DY v c./VRT)* n m