The Effect of Nano-Alumina Particles Generated in Situ in the Matrix of Ultralow and No Cement 85 wt% Al2O3 Refractory Castables

Autor:	João Baptista Baldo, José Antonio Alves Júnior
Rok vydání:	2019
Předmět:	Cement Residual strength Thermal shock Materials science Flexural strength technology industry and agriculture Nanoparticle Composite material Elastic modulus Pyrolysis Impulse excitation technique
Zdroj:	Journal of Materials Science and Chemical Engineering. :7-22
ISSN:	2327-6053 2327-6045
DOI:	10.4236/msce.2019.76002
Popis:	Advanced high alumina refractory castables of ultra-low and to cement types, are well-known because of their ability on developing similar and/or superior thermal and mechanical properties. Following the recent trend of including nanoparticles in refractory castables, in this work, it is presented a novel way to obtain the benefit effects on the thermal and mechanical properties, promoted by the development in situ, of alumina’s nanoparticles in the matrix of castable (85 wt% Al2O3). The alumina nanoparticles were originated in situ after firing, due to the pyrolysis and oxidation of an aqueous resin, produced by the Pechini process. The resin played a double role, one as mixing liquid vehicle and the other as the aluminum oxide nanoparticles precursor. The results indicate a strong increase in flexural strength and elastic modulus as well as leading to a higher residual strength after thermal shock.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::93f01b2fb3617cb42d55c8756adc9011 https://doi.org/10.4236/msce.2019.76002 Zobrazit plný text záznamu