Improvement of graphitization of isotropic carbon by Al2O3 formed from aluminium chelate compound

Autor:	J.K Yu, S Ueno, Keisuke Hiragushi, H.X Li
Rok vydání:	1999
Předmět:	Aluminium oxides Materials science Inorganic chemistry Isotropy chemistry.chemical_element Microstructure Catalysis chemistry.chemical_compound chemistry Aluminium Ethyl acetoacetate Materials Chemistry Ceramics and Composites Aluminium oxide Carbon
Zdroj:	Journal of the European Ceramic Society. 19:2843-2848
ISSN:	0955-2219
Popis:	For improving the graphitization of isotropic carbon, ethyl acetoacetate aluminium diisopropoxide and aluminium oxide were used as catalysts. Their effect was investigated and the corresponding mechanism was discussed. The results showed that the isotropic carbon was graphitized greatly by the addition of ethyl acetoacetate aluminium diisopropoxide when the heat-treatment temperature was over 1850°C, and slightly by the addition of aluminium oxide at 1900°C. The mechanism is considered to be that the aluminium compound formed from ethyl acetoacetate aluminium diisopropoxide reacted with C to give Al 4 C 3 and with increasing temperature the Al 4 C 3 decomposed to form Al(g) and C Gr which was graphitized. Additionally, Al-containing gases and CO 2 (g) were the reactants of the reaction between aluminium oxide and C. This showed only a little effect on the graphitization of isotropic carbon when the heat-treating temperature was 1900°C. ©
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d806be8a951cd34ff4c2048e055bbfae https://doi.org/10.1016/s0955-2219(99)00065-5 Zobrazit plný text záznamu Full Text from ScienceDirect