"\u0160ubrt, Jan" . "Poyato, J." . "Effect of Na+ and NH4+ cations on microstructure changes of natural vermiculite during heat treatment." . "Effect of Na+ and NH4+ cations on microstructure changes of natural vermiculite during heat treatment."@en . "Perez-Maqueda, L. A." . "HU - Ma\u010Farsko" . "Emanation thermal analysis (ETA), DTA, SEM, and XRD were applied for the characterization of the effect of Na+ and NH4+ ions used for saturation of natural Mg-vermiculite on the microstructure during heating. The microstructure changes were characterized by ETA under in situ conditions of samples heating in air in the temperature range 20-1300degreesC. It was found that Na+ and NH4+ ions have a significant effect on the microstructure changes during heat treatment of the natural Mg-vermiculite sample saturated with these ions. For Mg-vermiculite and Na+ saturated vermiculite the temperatures of the onset of the collapse of interlaminar space were determined by ETA. Differences in thermal stability of the microstructure of dehydrated vermiculite samples were observed by ETA: the microstructure of dehydrated Mg-vermiculite, and Na-vermiculite was found stable until 650 and 350degreesC, respectively. For dehydrated NH4-vermiculite the annealing of the microstructure started at 730degreesC. The onset temp"@en . "RIV/61388980:_____/02:50023054" . "67" . "RIV/61388980:_____/02:50023054!RIV/2003/AV0/A50003/N" . . "Effect of Na+ and NH4+ cations on microstructure changes of natural vermiculite during heat treatment." . "P(LN00A028), Z(AV0Z4032918)" . "Jimenez de Haro, M. C. J." . . . "1"^^ . "10"^^ . "Effect of Na+ and NH4+ cations on microstructure changes of natural vermiculite during heat treatment."@en . "Balek, V." . "Journal of Thermal Analysis and Calorimetry" . . "1" . "0"^^ . "0"^^ . "73;82" . "6"^^ . . . "644258" . . . . . . "1418-2874" . "Perez-Rodriguez, J. L." . . . . . . "emanation thermal analysis; microstructure changes; vermiculite"@en . "[5D637B7EBDF0]" . . "Emanation thermal analysis (ETA), DTA, SEM, and XRD were applied for the characterization of the effect of Na+ and NH4+ ions used for saturation of natural Mg-vermiculite on the microstructure during heating. The microstructure changes were characterized by ETA under in situ conditions of samples heating in air in the temperature range 20-1300degreesC. It was found that Na+ and NH4+ ions have a significant effect on the microstructure changes during heat treatment of the natural Mg-vermiculite sample saturated with these ions. For Mg-vermiculite and Na+ saturated vermiculite the temperatures of the onset of the collapse of interlaminar space were determined by ETA. Differences in thermal stability of the microstructure of dehydrated vermiculite samples were observed by ETA: the microstructure of dehydrated Mg-vermiculite, and Na-vermiculite was found stable until 650 and 350degreesC, respectively. For dehydrated NH4-vermiculite the annealing of the microstructure started at 730degreesC. The onset temp" .