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Effect of Lubricant on the Surface Structure of Aluminosilicate Fibers
Author(s) -
Mitchell Brian S.,
Fondeur Fernando,
Xiao Zhijun,
Li Wenyan,
Bennett Stacey
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02778.x
Subject(s) - aluminosilicate , crystallization , lubricant , x ray photoelectron spectroscopy , amorphous solid , fiber , materials science , chemical engineering , infrared spectroscopy , degradation (telecommunications) , analytical chemistry (journal) , mineralogy , chemistry , crystallography , composite material , catalysis , organic chemistry , telecommunications , computer science , engineering
Commercial aluminosilicate fibers of the nominal composition 45 wt% Al 2 O 3 , 54 wt% SiO 2 have similar bulk properties but different surface chemistries, depending on whether they were formed with (WL) or without (NL) the aid of a mineral‐oil lubricant. Both fiber samples are X‐ray amorphous as formed; they have similar crystallization temperatures and have activation energies for crystallization of 751 and 854 kJ/mol for samples NL and WL, respectively. Fiber surface properties differ markedly, as indicated by diffuse reflectance infrared transmission spectroscopy and X‐ray photoelectron spectroscopy. These techniques show that carbon from the lubricant degradation and/or combustion is incorporated into the melt, whereupon it reacts with nonbonding oxygens in the Al‐O network to form network carbonates.