High-temperature specific heat of crystals

Commercial sedimentation CaCO3 was ground by a vibration rod mill to investigate the physicochemical properties of mechanically activated CaCO3.When the CaCO3of the calcite structure was ground, the intensities of the crystal facesof calcite was decreased by distortions and so on, and the aragonite appeared as the grinding proceeded. The formed aragonite was transformed to the calcite when the sample was heated at 773K for3.6 ks. The dissociation pressure of CO2 of the ground CaCO3was larger than that of the non-ground CaCO3.The enthalpy; entropy and specific heat of change of the dissociation reaction were obtained. At high temperature, the emission rate of the ground CaCO3 was slightly larger than that of the non-ground CaCO3. At room temerature, the CaCO3 adsorbs CO2, and it desorbs the adsorbed CO2. The amount of adsorbed CO2 on the ground CaCO3 was larger than that of the non-ground CaCO3.

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Analysis of Zn substitution on structure, optical absorption, magnetization, and high temperature specific heat anomaly of the nano-crystalline LaFeO3

Journal of Applied Physics ◽

10.1063/1.5025252 ◽

2018 ◽

Vol 124 (6) ◽

pp. 065110 ◽

Cited By ~ 17

Author(s):

Samiya Manzoor ◽

Shahid Husain

Keyword(s):

High Temperature ◽

Optical Absorption ◽

Specific Heat ◽

Zn Substitution ◽

Nano Crystalline

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Fermi–Dirac Statistics

An Introduction to Statistical Mechanics and Thermodynamics ◽

10.1093/oso/9780198853237.003.0029 ◽

2019 ◽

pp. 386-403

Author(s):

Robert H. Swendsen

Keyword(s):

High Temperature ◽

Low Temperature ◽

Specific Heat ◽

Fermi Energy ◽

Fermi Gas ◽

Main Application ◽

Densities Of States ◽

Low Temperature Specific Heat ◽

Very High ◽

The Ideal

The main application of Fermi–Dirac Statistics is to calculate the properties of electrons. This chapter explains how the properties of fermions account for the behavior of metals. The Fermi energy is introduced and shown to correspond to a very high temperature, so that most properties can be obtained from low-temperature expansions. Both discrete and continuous densities of states are discussed. The Sommerfeld expansion is derived explicitly. The low-temperature specific heat and compressibility are derived. The most important fermions are electrons, and understanding the properties of electrons is central to understanding the properties of all materials. In this chapter we will study the ideal Fermi gas, which turns out to explain many of the properties of electrons in metals.

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