Particle size effects and thermal hysteresis in crystal structure transformations
- 1 January 1969
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Transactions of the Faraday Society
- Vol. 65, 3081-3087
- https://doi.org/10.1039/tf9696503081
Abstract
Particle size affects the temperature and enthalpy of phase transformations as well as the magnitude of thermal hysteresis ΔT, which is shown to be approximately equal to (1/Cpβ)ΔV2/V. The variation of ΔT with particle size (0–150 µm) is interpreted in terms of Turnbull's theory of heterogeneous nucleation. The dependence of the enthalpy of transformation on particle size seems to result from the variation of surface area and surface energy with particle size.Keywords
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