Preparation and thermal stability of ammonium alkaline earth trioxalatocobaltate(III) hydrates: NH 4 + M2+¦Co(C2O4)3¦·xH2O

1986 ◽  
Vol 31 (1) ◽  
pp. 7-14 ◽  
Author(s):  
M. G. Usha ◽  
M. Subba Rao ◽  
T. R. Narayanan Kutty
Keyword(s):  
Thermal Stability ◽  
Alkaline Earth ◽  
Thermal Stability Of

Thermal stability of alkali and alkaline-earth substituted LAMOX oxide-ion conductors

2010 ◽  
Vol 39 (1) ◽  
pp. 93-102 ◽  
Author(s):  
A. Selmi ◽  
C. Galven ◽  
G. Corbel ◽  
P. Lacorre
Keyword(s):  
Thermal Stability ◽  
Alkaline Earth ◽  
Oxide Ion Conductors ◽  
Oxide Ion ◽  
Thermal Stability Of ◽  
Ion Conductors

scholarly journals Phosphorescence and electron traps - I. The study of trap distributions

1945 ◽  
Vol 184 (999) ◽  
pp. 365-389 ◽  
Keyword(s):  
Thermal Stability ◽  
Low Temperatures ◽  
Alkaline Earth ◽  
Main Experiment ◽  
Electron Traps ◽  
Long Period ◽  
Steady Rate ◽  
General Complex ◽  
Different Depths ◽  
Thermal Stability Of

The fundamental connexion between thermoluminescence, phosphorescence and electron traps in solids has been investigated. Thermoluminescence and long-period phosphorescence arise from the release of electrons from metastable levels or traps. By studying the thermal stability of trapped electrons and the probability of release from traps of different depths, methods have been developed for finding the depths of electron traps in phosphors. The main experiment consists in exciting the phosphor at low temperatures until all the traps are filled; the phosphor is then warmed at a steady rate and the light emitted while warming is measured as a function of the temperature. The results show that the trap distribution in impurity phosphors such as willemite and the alkaline earth sulphides are, in general, complex, and extend over a range often as wide as 0·2-1·0 eV. The probability of release of an electron from a trap of depth E at temperature T is of the form se -E/kT , where is a constant. Values of s for alkaline earth and zinc sulphides are in the neighbourhood of 10 8 ±1 sec. -1 .

Effect of Eu3+ on Spectroscopic Properties and Energy Transfer in Er3+/Eu3+-Doped Ga2O3-GeO2 Glass

2011 ◽  
Vol 399-401 ◽  
pp. 930-934
Author(s):  
Ying Gang Zhao ◽  
Dong Mei Shi ◽  
Jin Liu ◽  
Xiao Feng Wang
Keyword(s):  
Thermal Stability ◽  
Optical Properties ◽  
Energy Transfer ◽  
Alkaline Earth ◽  
Spectroscopic Properties ◽  
Alkaline Earth Metals ◽  
Fiber Amplifiers ◽  
Optical Fiber Amplifiers ◽  
Geo2 Glass ◽  
Thermal Stability Of

Spectroscopic properties and energy transfer (ET) in Er3+/Eu3+-doped Ga2O3-GeO2 glass have been investigated. Effects of alkali metal and alkaline earth metals ions on thermal stability of Er3+-doped gallate-germanium glass have been investigated. Simultaneously influences of Eu3+ codoping on the optical properties of Er3+-doped Ga2O3-GeO2-Na2O (GN) glass have been investigated and the possible ET mechanisms involved have also been discussed. Significant enhancement of the 1.53 µm emission intensity and decrease of upconversion (UC) fluorescence with increasing Eu3+ concentration have been observed. The results indicate that the incorporation of Eu3+ into Er3+-doped GN glass can effectively improve 1.53-μm and lower UC luminescence, which makes GN glass more attractive for their use in C-band optical fiber amplifiers.

Investigation on the near-infrared-emitting thermal stability of Bi activated alkaline-earth aluminoborosilicate glasses

2015 ◽  
Vol 117 (5) ◽  
pp. 053107 ◽  
Author(s):  
Ronghua Wan ◽  
Zhiguo Song ◽  
Yongjin Li ◽  
Yuting Zhou ◽  
Qun Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Alkaline Earth ◽  
Near Infrared ◽  
Thermal Stability Of

Thermal stability of alkali metal borates and alkaline earth metal borates

1990 ◽  
Vol 36 (6) ◽  
pp. 2055-2059 ◽  
Author(s):  
N. M. Vedishcheva ◽  
B. A. Shakhmatkin ◽  
M. M. Shultz
Keyword(s):  
Thermal Stability ◽  
Alkali Metal ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Thermal Stability Of
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