A microplasma analyzer for the determination of alkali and alkaline-earth metals in small volumes of samples of complex phase composition

2015 ◽  
Vol 70 (12) ◽  
pp. 1468-1474 ◽  
Author(s):  
A. A. Zhirkov ◽  
V. V. Yagov ◽  
A. A. Vlasova ◽  
B. K. Zuev
Keyword(s):  
Phase Composition ◽  
Alkaline Earth ◽  
Alkaline Earth Metals ◽  
Complex Phase ◽  
Complex Phase Composition

scholarly journals Crystallization behaviour of Li2O·Nb2O5·SiO2 glass containing TiO2

2011 ◽  
Vol 5 (4) ◽  
pp. 223-227 ◽  
Author(s):  
Srdjan Matijasevic ◽  
Vladimir Zivanovic ◽  
Mihajlo Tosic ◽  
Snezana Grujic ◽  
Jovica Stojanovic ◽  
...  
Keyword(s):  
Phase Composition ◽  
Crystallization Behavior ◽  
Glass Ceramics ◽  
Primary Phase ◽  
Surface Crystallization ◽  
Complex Phase ◽  
Crystallite Sizes ◽  
Complex Phase Composition ◽  
Calculated Average

This paper deals with the crystallization of glass 30Li2O?15Nb2O5?50SiO2?5TiO2 (mol%). The crystallization behavior was studied under isothermal and non-isothermal conditions. XRD and SEM methods were employed for determination of phase composition and microstructure of crystallized glass. It was detected that this glass crystallizes by the surface crystallization mechanism. SEM micrographs of the crystallized samples revealed that the crystals grow in the form of dendrites. The glass-ceramics with complex phase composition was obtained. Three crystalline phases were detected where LiNbO3 has grown as primary phase and a secondary ones Li2Si2O5 and SiO2 appeared. The calculated average crystallite sizes are: 27 nm for LiNbO3 , 115 nm for Li2Si2O5 and 45 nm for SiO2 . From the experimental data an activation energy of crystals growth, calculated using the Kissinger relation, is Ea = 275 ?10 KJ / mol.

Determination of semimicro amounts of calcium in the presence of other alkaline-earth metals

Talanta ◽  
1988 ◽  
Vol 35 (3) ◽  
pp. 231-234 ◽  
Author(s):  
Nirmal Maitra ◽  
Albert W. Herlinger ◽  
Bruno Jaselskis
Keyword(s):  
Alkaline Earth ◽  
Alkaline Earth Metals

Determination of the solubility of alkaline-earth metals (Ca, Sr, Ba) into La2CuO4 by the SCFZ method

1994 ◽  
Vol 225 (1-2) ◽  
pp. 185-189 ◽  
Author(s):  
Isao Tanaka ◽  
Junichi Yamamoto ◽  
Yoshihiro Mori ◽  
Hideyoshi Tanabe ◽  
M.K.R. Khan ◽  
...  
Keyword(s):  
Alkaline Earth ◽  
Alkaline Earth Metals
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