Study on thermal decomposition and sintering behaviour of internally gelated simulated inert matrix fuel

Autor:	N.P Bhat, K. Suresh Kumar, Tom Mathews
Rok vydání:	2005
Předmět:	Materials science Thermal decomposition Sintering Condensed Matter Physics Decomposition law.invention Thermogravimetry Chemical engineering law Differential thermal analysis Physical and Theoretical Chemistry Crystallization Thermal analysis Instrumentation Pyrolysis Nuclear chemistry
Zdroj:	Thermochimica Acta. 427:27-30
ISSN:	0040-6031
DOI:	10.1016/j.tca.2004.08.008
Popis:	Simulated inert matrix fuels corresponding to the compositions Zr 0.75 Y 0.10 Er 0.05 Ce 0.10 O 1.925 and Zr 0.70 Y 0.10 Er 0.05 Ce 0.15 O 1.925 were synthesized through the ammonia internal gelation process. The thermal decomposition behaviour of the gel was investigated using thermogravimetry/differential thermal analysis (TG/DTA) and powder X-ray diffraction (XRD). The gel decomposes in two stages. The first step involves evolution of water and ammonia at around 200 °C and in the second step at around 600 °C the decomposition of trapped formaldehyde (HCHO) occurs simultaneously with crystallization of zirconia. The crystallite size of the decomposed powder was found to be smaller than 10 nm. The decomposed powder could be sintered to around 90% of theoretical density using microwave energy source in 60 min.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e65a99b68ab0c37298306cabdfe2b5f3 https://doi.org/10.1016/j.tca.2004.08.008 Zobrazit plný text záznamu Full Text from ScienceDirect