کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1465088 | 989680 | 2007 | 10 صفحه PDF | دانلود رایگان |
Powder precursors lithium aluminosilicate (LAS) of low expansion characteristics were synthesized by following the wet interaction technique in the hydroxyhydrogel form using lithium carbonate (Li2CO3), hydrated aluminium nitrate [Al(NO3)3·9H2O], fume silica (SiO2) and zirconium oxychloride (ZrOCl2·8H2O). Dilatometry, X-ray diffraction (XRD), IR analysis, Scanning Electron Microscopy (SEM) and Image analysis were done to study sintering, characteristics phase transformation and microstructure on the sintered specimens. ZrO2 was found to promote the formation of β-eucryptite, and grain size of the sintered specimens could be related to the amount of ZrO2 present in the starting powder precursor. The thermal expansion characteristics were also found to be strongly influenced by ZrO2 content in the specimens.
Journal: Ceramics International - Volume 33, Issue 2, March 2007, Pages 123–132