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19 de mar. de 2022 · Zentropy theory notes that the thermodynamic relationship of thermal expansion, when the volume increases due to higher temperature, is equal to the negative derivative of entropy with respect to pressure, i.e., the entropy of most material systems decreases with an increase in pressure.
3 de feb. de 2022 · The present zentropy theory provides a thermodynamic framework for mechanistic understanding of thermal expansion and has the potential to predict anomalies of other physical properties such as bulk modulus, heat capacity, and the order-disorder transition temperature in terms of the second derivatives of free energy for discovering ...
22 de sept. de 2023 · In the current study, the researchers reported finding a method to apply zentropy theory to ferroelectrics, focusing on lead titanate. Like all ferroelectrics, lead titanate possesses electric polarization that can be reversed when external electric fields, temperature changes, or mechanical stress is applied.
14 de jul. de 2021 · Based on the thermodynamic relation that the derivative of volume with respect to temperature, i.e., thermal expansion, is equal to the negative derivative of entropy with respect to pressure, we developed a general theory in terms of multiscale entropy to understand and predict the change of volume as a function of temperature ...
11 de ago. de 2023 · Systems in the Universe trend toward disorder, with only applied energy keeping the chaos at bay. The concept is called entropy, and examples can be found everywhere: ice melting, campfire...
Zentropy, which considers how entropy can occur over multiple scales within a system, may hold promise as a way to develop better ferroelectric materials. A team led by Zi-Kui Liu, the Dorothy Pate Enright Professor of Materials Science and Engineering at Penn State, developed the theory and recently published their latest paper on the concept, ...
11 de ago. de 2023 · Systems in the universe trend toward disorder, with only applied energy keeping the chaos at bay. The concept is called entropy, and examples can be found everywhere: ice melting, campfire...
