Počet záznamů: 1

Use of emanation thermal analysis to characterize thermal reactivity of brannerite mineral

SYSNO ASEP	0097337
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Ostatní články
Název	Use of emanation thermal analysis to characterize thermal reactivity of brannerite mineral
Překlad názvu	Použití emanační termické analýzy pro charakterizaci reaktivity minerálu branneritu za zvýšené teploty
Tvůrce(i)	Balek, V. (CZ) Vance, E.R. (AU) Zeleňák, V. (CZ) Málek, Z. (CZ) Šubrt, Jan (UACH-T)_{SAI, RID}
Zdroj.dok.	Journal of Thermal Analysis and Calorimetry. - : Akadémiai Kiadó - ISSN 1388-6150 Roč. 88, č. 1 (2007), s. 93-98
Poč.str.	6 s.
Jazyk dok.	eng - angličtina
Země vyd.	HU - Maďarsko
Klíč. slova	brannerite ; emanation thermal analysis
Vědní obor RIV	CA - Anorganická chemie
CEZ	AV0Z40320502 - UACH-T (2005-2011)
Anotace	Emanation thermal analysis (ETA) was used to characterize the thermal reactivity of amorphous brannerite mineral of general formula U1-xTi2+xO6 (locality El Cabril, near Cordoba, Spain). It was demonstrated that on sample heating up to 880 degrees C microstructure changes taking place in the sample were accompanied by the formation of new radon diffusion paths, followed by their closing up during the final transformation of amorphous to crystalline brannerite in the range 900-1020 degrees C. Relative changes in structure irregularities that served as radon diffusion paths during heating and subsequent cooling of the sample to temperatures of 300, 550, 750, 880, 1020 and 1130 degrees C, respectively, were determined from the ETA results. Mass losses in temperature ranges of 230-315, 570-760 and 840-1040 degrees C were observed by thermogravimetry. Mass spectrometry indicated the release of CO2 mainly due to the decomposition of minor carbon amount in the brannerite mineral sample.
Pracoviště	Ústav anorganické chemie
Kontakt	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Rok sběru	2008

Počet záznamů: 1