China
Africa
Explore chapters and articles related to this topic
Stability and Viability of Food Nanoparticles
Published in C. Anandharamakrishnan, S. Parthasarathi, Food Nanotechnology, 2019
S. Parthasarathi, C. Anandharamakrishnan
According to the Gibbs-Thomson equation, the smaller the particle size, the higher the decrease in melting temperature. There was no significant change in particle size even when the nanoparticles weresubjected to extreme heat stress at 95°C.
Calculation of liquidus curve in phase diagram LiCl-KCl by molecular dynamics simulation
Published in Phase Transitions, 2020
M. A. Kobelev, A. S. Tatarinov, D. O. Zakiryanov, N. K. Tkachev
For the LiCl concentration range x(LiCl) = 0.6–1, there is a notable agreement with the Van-Laar semi-empirical rule. This imposes that the liquidus curve should be convex upwards near the pure component, whose melting entropy is , here is gas constant [17]. It should be noted that for all alkali halides, the values of this quantity are per mole [2]. At the same time, the liquidus curve is in consistently worse agreement both with the experimental data and both the Van-Laar rule at x(LiCl) = 0–0.5. In this range, the determination error of the liquidus point through the described approach increases essentially. Given the moderate cell size, this could rise from the well-known phenomenon of lowering the melting temperature for nanoscale materials (Gibbs-Thomson equation). Solving this problem without the involvement of time-consuming large-scale simulations is a difficult challenge.
A discrete model of Ostwald ripening based on multiple pairwise interactions
Published in Philosophical Magazine, 2018
According to Voorhees [30], it has long been recognised that elastic fields can radically change the entire late stage of phase transformation processes. In fact, in solid–solid systems the classic Gibbs–Thomson equation has to be reanalysed to take into account the presence of interfacial stresses. In addition, the lattice planes of coherent precipitates and matrix are continuous across the matrix-particle interface. A result of such a coherent interface is that long-range elastic fields are generated in both the precipitate and matrix phases.