Results 21 to 30 of about 2,838,113 (300)

In Situ Synthesis of Alumina Nanoparticles in a Binary Carbonate Salt Eutectic for Enhancing Heat Capacity

open access: yesNanomaterials, 2020
A binary carbonate salt eutectic (Li2CO3-K2CO3)-based nanofluid was in situ synthesized by mixing with a precursor material, aluminum nitrate nonahydrate (Al(NO3)3·9H2O).
Yousof Nayfeh   +3 more
doaj   +1 more source

Temperature-dependent thermal properties of spark plasma sintered alumina [PDF]

open access: yesScience of Sintering, 2017
In this work, we report temperature-dependent thermal properties of alumina powder and bulk alumina consolidated by spark plasma sintering method. The properties were measured between room temperature and 250ºC using a thermal constants analyzer.
Saheb Nouari, Hayat Umer
doaj   +1 more source

Magnetization, Band Gap and Specific Heat of Pure and Ion Doped MnFe2O4 Nanoparticles

open access: yesMagnetochemistry, 2023
We have studied the magnetic properties of ion doped MnFe2O4 nanoparticles with the help of a modified Heisenberg model and Green’s function theory taking into account all correlation functions.
I. N. Apostolova   +2 more
doaj   +1 more source

FIRE CHARACTERISTICS FOR ADVANCED MODELLING OF FIRES [PDF]

open access: yesCivil Engineering Journal, 2016
This paper summarizes the material and fire properties of solid flammable/combustible materials /substances /products, which are used as inputs for the computer numerical fire models. At the same time it gives the test standards for their determination.
Otto Dvořák
doaj   +1 more source

Non-Universality of the Specific Heat in Glass Forming Systems [PDF]

open access: yes, 2008
We present new simulation results for the specific heat in a classical model of a binary mixture glass-former in two dimensions. We show that in addition to the formerly observed specific heat peak there is a second peak at lower temperatures which was ...
D. Kivelson   +4 more
core   +1 more source

Heat capacity of liquids: A hydrodynamic approach

open access: yesCondensed Matter Physics, 2015
We study autocorrelation functions of energy, heat and entropy densities obtained by molecular dynamics simulations of supercritical Ar and compare them with the predictions of the hydrodynamic theory.
T. Bryk, T. Scopigno, G. Ruocco
doaj   +1 more source

Specific heat of a PIN-PMN-PT single-crystal up to 500K [PDF]

open access: yesJournal of Advanced Dielectrics, 2017
The temperature dependence of the specific heat of the single crystal Pb(In0.5Nb0.5)O3-Pb(Mg1∕3Nb2∕3)O3-PbTiO3 (PIN-PMN-PT) was obtained at 80–500K by means of ac-calorimetry, and comparison with the calorimetric data for PMN was made, allowing one to ...
S. Grabovsky   +5 more
doaj   +1 more source

Entanglement area law from specific heat capacity [PDF]

open access: yes, 2015
We study the scaling of entanglement in low-energy states of quantum many-body models on lattices of arbitrary dimensions. We allow for unbounded Hamiltonians such that systems with bosonic degrees of freedom are included.
Brandao, Fernando G. S. L.   +1 more
core   +3 more sources

THERMAL INSULATION PROPERTIES RESEARCH OF THE COMPOSITE MATERIAL WATER GLASS–GRAPHITE MICROPARTICLES [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2014
Research results for the composite material (CM) water glass–graphite microparticles with high thermal stability and thermal insulation properties are given.
V. A. Gostev   +3 more
doaj  

Action and Entropy in Heat Engines: An Action Revision of the Carnot Cycle

open access: yesEntropy, 2021
Despite the remarkable success of Carnot’s heat engine cycle in founding the discipline of thermodynamics two centuries ago, false viewpoints of his use of the caloric theory in the cycle linger, limiting his legacy.
Ivan R. Kennedy, Migdat Hodzic
doaj   +1 more source

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