which is the Vogel-Fulcher equation,Eq. (13). (Actually this Δμ’, rather than Δμ, is the actualactivation energy3.3kcal. The latter is greater than this value because it includes thecohesive energyfrom the neighbors). The free volume is usually considered to be Van der Waal’s excess...
Polycrystalline ceramic samples of Caヾoped fresnoite compounds of formula Ba2−XCaXTiSi2O8 (X = 0.0, 0.4, 0.8 & 1.0) have been prepared by conventional solid state reaction method at high temperatures using high purity oxides and carbonates. The formation of the single phase compounds ...
Temperature-Induced Switching of the Mechanism for Intramolecular Energy Transfer in a 2,2‘:6‘,2‘ ‘-Terpyridine-Based Ru(II)−Os(II) Trinuclear Array The synthesis and photophysical properties of a linear 2,2‘:6‘,2‘ ‘-terpyridine-based trinuclear Ru(II)−Os(II) nanometer-...
Photochemical synthesis and thermal chemistry of [formula omitted]-2,2,5,5-tetramethyl-3,4-diphenylhex-3-ene, A sterically congested Stilbenepolyphenylalkene derivatives (stilbene derivativesZ-2,2,5,5-tetramethyl-3,4-diphenylhex-3-ene isomerized to its Z-isomer with an unusually low rotational ...
It was confirmed quantitatively that the principal mechanism of negative thermal quenching is the thermal excitation of electrons to the initial state of the PL transition from the eigenstates with smaller energy eigenvalues. In addition, it was revealed that the real activation energy for the non...
Free Essay: In physics, energy is usually described as the ability of a system to perform work. However, this definition is often challenged because of the...
Thermal resistance is the concept that refers to the restriction placed on the exchange of thermal energy between two systems at different temperatures, in order to maintain their thermal equilibrium. It can be described using analytical macroscopic and numerical atomistic approaches, which focus on the...
The high energy 纬-ray attenuation and sound velocity have been measured to investigate the bonding nature and structural changes in liquid Ge-Te system. T... Tsuchiya,Yoshimi - 《Journal of the Physical Society of Japan》 被引量: 67发表: 2007年 Optimum deposition conditions of ultrasmooth silv...
Under linear temperature increase condition, the apparent activation energy of the thermal decomposition reaction of HHTDD is about 160 kJ mol−1. The neutral hydrolytic reaction equation and ion dissociation process of HHTDD are proposed. 展开 ...
“Lakes: Chemistry, Geology, Physics” (A. Lerman, Ed.), Springer-Verlag, New York, p. 237–293, with permission. InTable V the high pH in the alkali lakes results from the fact that HCO3− is the dominant anion and greatly exceeds the concentration of calcium and magnesium in the ...