Etude thermoanalytique de conditions de formation du gallate de sodium,II |
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Authors: | M Viltange |
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Institution: | (1) Laboratoire de Recherches Microanalytiques du C.N.R.S., Ecole Nationale Supérieure de Chimie, Paris, France |
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Abstract: | Résumé L'étude par TG, ATD, analyse chimique et IR du système Na2O2/Ga2O3 a montré qu'au début du chauffage, sous l'action de la soude, il se formait de l'hydroxogallate qui se transformait en gallate vers 130–150 C. Entre 287 et 350 , Na2O2 et NaOH attaquent conjointement Ga2O3. NaGaO2 obtenu possède des groupements GaO4. La sensibilité de l'ATD permet de différencier les domaines de réactivité maximale des deux composés sodiques. Audelà de 350 , une nouvelle réaction de Na2O2 produit principalement du gallate à groupements GaO6. L'attaque de Ga2O3 au cours de ces différentes phases dépend essentiellement de sa variété cristalline.
Thermogravimetric, differential thermoanalytical and infrared spectroscopic studies of the system Na2O2/Ga2O3 have shown that in the reaction with sodium hydroxide hydroxogallate is formed, which transforms to gallate in the range of 130 to 150 . Between 287 and 350 Na2O2 and NaOH attack Ga2O3 together, and the NaGaO2 obtained contains GaO4 groups. The DTA method permitted to distinguish the ranges of maximum reactivity of the two sodium compounds. Above 350 gallate containing GaO6 groups is mainly formed in a new reaction of Na2O2. The attack of Ga2O3 in the course of the different steps depends mainly on its crystal structure.
Zusammenfassung Thermogravimetrische, differentialthermoanalytische und infrarotspektroskopische Untersuchungen des Systems Na2O2/Ga2O3 zeigten, daß bei Einwirkung von Natriumhydroxyd Hydroxogallat gebildet wurde, das zwischen 130–150 in Gallat überging. Zwischen 287 und 350 greifen Na2O2 und NaOH gemeinsam das Ga2O3 an, das erhaltene NaGaO2 enthält GaO4 Gruppen. Durch DTA gelang es die Gebiete der maximalen Reaktivität der zwei Natriumverbindungen zu differenzieren. über 350 entsteht durch eine neue Reaktion von Na2O2 hauptsächlich Gallat mit GaO6 Gruppen. Der Aufschluß von Ga2O3 hängt während dieser verschiedenen Phasen im wesentlichen von seiner kristallinen Beschaffenheit ab.
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![Vcy](/content/j154132v28161g10/xxlarge1042.gif) ![Ucy](/content/j154132v28161g10/xxlarge1059.gif) ![Ocy](/content/j154132v28161g10/xxlarge1054.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![Dcy](/content/j154132v28161g10/xxlarge1044.gif) ![Icy](/content/j154132v28161g10/xxlarge1048.gif) ![Ncy](/content/j154132v28161g10/xxlarge1053.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![Ncy](/content/j154132v28161g10/xxlarge1053.gif) ![Icy](/content/j154132v28161g10/xxlarge1048.gif) ![Ncy](/content/j154132v28161g10/xxlarge1053.gif) ![Acy](/content/j154132v28161g10/xxlarge1040.gif) ![tcy](/content/j154132v28161g10/xxlarge1090.gif) ![Rcy](/content/j154132v28161g10/xxlarge1056.gif) ![Icy](/content/j154132v28161g10/xxlarge1048.gif) . ![Ncy](/content/j154132v28161g10/xxlarge1053.gif) ![Ocy](/content/j154132v28161g10/xxlarge1054.gif) ![Vcy](/content/j154132v28161g10/xxlarge1042.gif) ![Ocy](/content/j154132v28161g10/xxlarge1054.gif) ![Rcy](/content/j154132v28161g10/xxlarge1056.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![Acy](/content/j154132v28161g10/xxlarge1040.gif) ![kcy](/content/j154132v28161g10/xxlarge1082.gif) ![tscy](/content/j154132v28161g10/xxlarge1094.gif) Na2O2 ![Vcy](/content/j154132v28161g10/xxlarge1042.gif) ![ycy](/content/j154132v28161g10/xxlarge1099.gif) ![shcy](/content/j154132v28161g10/xxlarge1096.gif) 350 , ![Bcy](/content/j154132v28161g10/xxlarge1041.gif) ![Ocy](/content/j154132v28161g10/xxlarge1054.gif) ![lcy](/content/j154132v28161g10/xxlarge1083.gif) ![softcy](/content/j154132v28161g10/xxlarge1100.gif) ![shcy](/content/j154132v28161g10/xxlarge1096.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![CHcy](/content/j154132v28161g10/xxlarge1063.gif) ![Acy](/content/j154132v28161g10/xxlarge1040.gif) ![scy](/content/j154132v28161g10/xxlarge1089.gif) ![tcy](/content/j154132v28161g10/xxlarge1090.gif) ![softcy](/content/j154132v28161g10/xxlarge1100.gif) ![Ocy](/content/j154132v28161g10/xxlarge1054.gif) ![Bcy](/content/j154132v28161g10/xxlarge1041.gif) ![Rcy](/content/j154132v28161g10/xxlarge1056.gif) ![Acy](/content/j154132v28161g10/xxlarge1040.gif) ![zhcy](/content/j154132v28161g10/xxlarge1078.gif) ![Ucy](/content/j154132v28161g10/xxlarge1059.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![tcy](/content/j154132v28161g10/xxlarge1090.gif) ![scy](/content/j154132v28161g10/xxlarge1089.gif) ![gcy](/content/j154132v28161g10/xxlarge1075.gif) ![Acy](/content/j154132v28161g10/xxlarge1040.gif) ![lcy](/content/j154132v28161g10/xxlarge1083.gif) ![lcy](/content/j154132v28161g10/xxlarge1083.gif) ![Acy](/content/j154132v28161g10/xxlarge1040.gif) , ![scy](/content/j154132v28161g10/xxlarge1089.gif) ![Dcy](/content/j154132v28161g10/xxlarge1044.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![Rcy](/content/j154132v28161g10/xxlarge1056.gif) ![zhcy](/content/j154132v28161g10/xxlarge1078.gif) ![Acy](/content/j154132v28161g10/xxlarge1040.gif) ![SHCHcy](/content/j154132v28161g10/xxlarge1065.gif) ![Icy](/content/j154132v28161g10/xxlarge1048.gif) G![Acy](/content/j154132v28161g10/xxlarge1040.gif) 6-![gcy](/content/j154132v28161g10/xxlarge1075.gif) ![Rcy](/content/j154132v28161g10/xxlarge1056.gif) ![Ucy](/content/j154132v28161g10/xxlarge1059.gif) ![pcy](/content/j154132v28161g10/xxlarge1087.gif) ![pcy](/content/j154132v28161g10/xxlarge1087.gif) . ![Ocy](/content/j154132v28161g10/xxlarge1054.gif) ![tcy](/content/j154132v28161g10/xxlarge1090.gif) ![kcy](/content/j154132v28161g10/xxlarge1082.gif) ![Rcy](/content/j154132v28161g10/xxlarge1056.gif) ![ycy](/content/j154132v28161g10/xxlarge1099.gif) ![tcy](/content/j154132v28161g10/xxlarge1090.gif) ![Icy](/content/j154132v28161g10/xxlarge1048.gif) G 2 3 ![khcy](/content/j154132v28161g10/xxlarge1093.gif) ![Ocy](/content/j154132v28161g10/xxlarge1054.gif) ![Dcy](/content/j154132v28161g10/xxlarge1044.gif) ![Rcy](/content/j154132v28161g10/xxlarge1056.gif) ![Acy](/content/j154132v28161g10/xxlarge1040.gif) ![zhcy](/content/j154132v28161g10/xxlarge1078.gif) ![lcy](/content/j154132v28161g10/xxlarge1083.gif) ![Icy](/content/j154132v28161g10/xxlarge1048.gif) ![CHcy](/content/j154132v28161g10/xxlarge1063.gif) ![Ncy](/content/j154132v28161g10/xxlarge1053.gif) ![ycy](/content/j154132v28161g10/xxlarge1099.gif) ![tcy](/content/j154132v28161g10/xxlarge1090.gif) ![Ucy](/content/j154132v28161g10/xxlarge1059.gif) ![pcy](/content/j154132v28161g10/xxlarge1087.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![Ncy](/content/j154132v28161g10/xxlarge1053.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![zhcy](/content/j154132v28161g10/xxlarge1078.gif) ![Ncy](/content/j154132v28161g10/xxlarge1053.gif) ![Acy](/content/j154132v28161g10/xxlarge1040.gif) ![CHcy](/content/j154132v28161g10/xxlarge1063.gif) ![Icy](/content/j154132v28161g10/xxlarge1048.gif) ![tcy](/content/j154132v28161g10/xxlarge1090.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![lcy](/content/j154132v28161g10/xxlarge1083.gif) ![softcy](/content/j154132v28161g10/xxlarge1100.gif) ![Ocy](/content/j154132v28161g10/xxlarge1054.gif) ![Mcy](/content/j154132v28161g10/xxlarge1052.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![Rcy](/content/j154132v28161g10/xxlarge1056.gif) ![zhcy](/content/j154132v28161g10/xxlarge1078.gif) ![Acy](/content/j154132v28161g10/xxlarge1040.gif) ![Vcy](/content/j154132v28161g10/xxlarge1042.gif) ![Icy](/content/j154132v28161g10/xxlarge1048.gif) ![scy](/content/j154132v28161g10/xxlarge1089.gif) ![Icy](/content/j154132v28161g10/xxlarge1048.gif) ![Ocy](/content/j154132v28161g10/xxlarge1054.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![gcy](/content/j154132v28161g10/xxlarge1075.gif) ![kcy](/content/j154132v28161g10/xxlarge1082.gif) ![Rcy](/content/j154132v28161g10/xxlarge1056.gif) ![Icy](/content/j154132v28161g10/xxlarge1048.gif) ![scy](/content/j154132v28161g10/xxlarge1089.gif) ![tcy](/content/j154132v28161g10/xxlarge1090.gif) ![lcy](/content/j154132v28161g10/xxlarge1083.gif) ![lcy](/content/j154132v28161g10/xxlarge1083.gif) ![Icy](/content/j154132v28161g10/xxlarge1048.gif) ![CHcy](/content/j154132v28161g10/xxlarge1063.gif) ![IEcy](/content/j154132v28161g10/xxlarge1045.gif) ![scy](/content/j154132v28161g10/xxlarge1089.gif) ![kcy](/content/j154132v28161g10/xxlarge1082.gif) ![Ocy](/content/j154132v28161g10/xxlarge1054.gif) ![scy](/content/j154132v28161g10/xxlarge1089.gif) ![tcy](/content/j154132v28161g10/xxlarge1090.gif) ![Rcy](/content/j154132v28161g10/xxlarge1056.gif) ![Ucy](/content/j154132v28161g10/xxlarge1059.gif) ![kcy](/content/j154132v28161g10/xxlarge1082.gif) ![tcy](/content/j154132v28161g10/xxlarge1090.gif) ![Ucy](/content/j154132v28161g10/xxlarge1059.gif) ![Rcy](/content/j154132v28161g10/xxlarge1056.gif) .
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