scholarly journals Defect pressure, formation volume, and temperature dependence of formation properties of point defects in ionic solids

1980 ◽  
Vol 41 (C6) ◽  
pp. C6-516-C6-519
Author(s):  
R. Bauer ◽  
R. K. Leutz
Keyword(s):  
Temperature Dependence ◽  
Point Defects ◽  
Ionic Solids

ON THE TEMPERATURE DEPENDENCE OF PINNING BY IRRADIATION-INDUCED POINT DEFECTS IN COPPER

1971 ◽  
Vol 32 (C2) ◽  
pp. C2-151-C2-152
Author(s):  
P. WINTERHAGER ◽  
G. ROTH ◽  
R. JOHN ◽  
K. LÜCKE
Keyword(s):  
Temperature Dependence ◽  
Point Defects

Interaction of Point Defects in Ice

1978 ◽  
Vol 21 (85) ◽  
pp. 115-122
Author(s):  
J. H. Bilgram ◽  
H. Gränicher
Keyword(s):  
Experimental Data ◽  
Dielectric Properties ◽  
Temperature Dependence ◽  
Point Defects ◽  
Low Frequency ◽  
Defect Concentration ◽  
Dielectric Measurements ◽  
Long Time ◽  
Nmr Techniques ◽  
Bjerrum Defect

AbstractThe interaction of point detects in ice has been neglected for a long time. Experimental data obtained from dielectric measurements on HF-doped crystals stimulated a new evaluation of the possibility of an interaction between Bjerrum defects and ions. In a previous paper it has been shown that this leads us to assume the existence of aggregates of Bjerrum defects and ions. In this paper these aggregates and Bjerrum defects are used to explain the dielectric properties of ice, especially the temperature dependence of the product of the high and low frequency conductivity σ0σ∞.The interaction of Bjerrum defects and impurity molecules leads to a dependence of the concentration of frenkel pairs on Bjerrum-defect concentration. At HF concentrations above the native Bjerrum-defect concentration the formation of a Frenkel pair is enhanced. This leads to the fast out-diffusion which has been studied in highly doped crystals by means of NMR techniques.

TEMPERATURE DEPENDENCE OF THERMODYNAMIC PROPERTIES OF IONIC SOLIDS

2009 ◽  
Vol 23 (11) ◽  
pp. 2503-2509 ◽  
Author(s):  
S. K. SHARMA
Keyword(s):  
Experimental Data ◽  
Temperature Dependence ◽  
Volume Expansion ◽  
Close Agreement ◽  
Present Model ◽  
Expansion Ratio ◽  
Thermal Expansivity ◽  
Temperature Derivative ◽  
Computing Model ◽  
Ionic Solids

The present paper proposes a computing model for temperature dependence of volume thermal expansivity, volume expansion ratio and second order temperature derivative of volume based on the assumption that the product αKT remains constant at high temperatures and zero pressure. We have taken NaCl and KCl to testify the validity of the present model. A fairly close agreement between the calculated results and experimental data strongly supports the present model.

The Effect of Point Defects Induced by Fast Neutron Irradiation on the Thermal Conductivity of Boron Carbide

2017 ◽  
Vol 726 ◽  
pp. 153-158
Author(s):  
Ai Bing Du ◽  
Zhi Xue Qu ◽  
Xi Ping Su ◽  
Xiao Xiao
Keyword(s):  
Thermal Conductivity ◽  
Boron Carbide ◽  
Temperature Dependence ◽  
Fast Neutron ◽  
Point Defects ◽  
Thermal Conduction ◽  
Conduction Model ◽  
Initial Stage ◽  
Fast Neutron Irradiation ◽  
Conduction Behavior

The thermal conduction behavior of the neutron absorbing ceramic boron carbide in the initial stage of the irradiation was analyzed and a classical thermal conduction model was used to estimate the variation of the thermal conductivity in this paper. The calculated thermal conductivity using the model shows a large degration in the initial stage of irradiation. As the burnup increases, the thermal conductivity turns to be free of temperature dependence. These calculated results are consistent well with the expermental data of thermal conductivity of the irradiated boron carbide, which may suggest that the variation of the thermal conductivity of boron carbide is predominantly determined by the point defects scattering in the initial stage of irradiation.

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