Divalent europium-activated alkaline-earth-metal chlorophosphate luminophores [M5(PO4)3Cl:Eu2+; M=Ca, Sr, Ba] by self-propagating high-temperature synthesis

1997 ◽  
Vol 7 (2) ◽  
pp. 345-349 ◽  
Author(s):  
M. Kottaisamy ◽  
M. Mohan Rao ◽  
D. Jeyakumar
Keyword(s):  
High Temperature ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Temperature Synthesis ◽  
Divalent Europium ◽  
High Temperature Synthesis

scholarly journals Self-Propagating High-Temperature Synthesis of Chromium Substituted Lanthanide – Barium – Copper Oxides, LnBa2Cu3-xCrxO7-y (Ln = Y; La; Nd; Sm and Yb)

2017 ◽  
Vol 4 (2) ◽  
pp. 73 ◽  
Author(s):  
Maxim V. Kuznetsov ◽  
Ivan P. Parkin ◽  
Yuri G. Morozov ◽  
Alexander G. Merzhanov
Keyword(s):  
Magnetic Susceptibility ◽  
High Temperature ◽  
Sodium Perchlorate ◽  
Earth Metal ◽  
X Ray Diffraction ◽  
Temperature Synthesis ◽  
X Ray ◽  
High Temperature Synthesis ◽  
Barium Copper ◽  
Chromium Substitution

<p>A series of MBa<sub>2</sub>Cu<sub>3-x</sub>CrxO<sub>7-y</sub> (M = Y; La; Nd; Sm and Yb; <em>x </em>= 0, 0.05, 0.15, 0.25) materials were synthesized in air by self-propagating high-temperature synthesis (SHS) involving reaction of stoichiometric mixtures of rare-earth metal (III) oxide, barium peroxide, copper metal, chromium (III) oxide and sodium perchlorate. All the SHS processes were followed by sintering in oxygen at 950 °C for 2h. The products were characterized by SEM, X-ray powder diffraction, UV, superconductive transition temperatures (T<sub>c</sub>) and magnetic susceptibility (χ) measurements. X-ray diffraction data showed that single phase orthorhombic (or tetragonal for M = Nd) materials were produced. All series of materials showed a systematic increase in lattice parameters and unit cell volume with chromium content (M = Y: <em>x </em>= 0, <em>V </em>= 174.25 Å3; <em>x </em>= 0.25, <em>V </em>= 175.10 Å3). Thermal stability of all the SHS prepared materials increased with <em>x</em>. Oxygen content of all the samples increased with <em>x</em>, but did not exceed 7.0. Superconductivity transition temperature decreased with chromium substitution in all systems (98-77 K). Magnetic susceptibility decreased with chromium substitution.</p>

Electrochemistry and Dynamic Ionography of Self-Propagating High-Temperature Synthesis (SHS)

2007 ◽  
Vol 555 ◽  
pp. 73-81
Author(s):  
Maxim V. Kuznetsov ◽  
Yuri G. Morozov ◽  
Ivan P. Parkin
Keyword(s):  
High Temperature ◽  
Chemical Reactions ◽  
Alkaline Earth ◽  
Complex Oxides ◽  
Temperature Synthesis ◽  
Group Vi ◽  
Electrochemical Processes ◽  
High Temperature Synthesis ◽  
In Situ Diagnostics

The results of a new potentiometric technique for in situ diagnostics of self-propagating high-temperature synthesis (SHS) of different complex oxides are presented. This technique is based on electrochemical processes. The characteristic peaks attributed to the electric responses from cation streams of alkali, alkaline-earth and some elements of group VI are discovered and the respective routes of the corresponding chemical reactions found.

Low temperature synthesis and structures of alkaline earth metal chalcogenides Ba3Cu4SbS6OH, BaCuSbS3and BaCu2S2

RSC Advances ◽  
2014 ◽  
Vol 4 (55) ◽  
pp. 28937 ◽  
Author(s):  
Zhimin Ma ◽  
Fan Weng ◽  
Qiuran Wang ◽  
Qun Tang ◽  
Ganghua Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Metal Chalcogenides ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis
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