Abstract
Cordierite precursor was obtained through a process, which involved the decomposition of metal nitrates on the surface of ultrafine carbon black powder between 100–300°C and the gasification of the carbon black at higher temperature in air. The average size of the particles, which were heat-treated at 700°C for 10h, is about 1020 nm, and the specific surface area is about 129 m2/g. The experimental results show that the ultra-fine particles of cordierite precursor can be produced by this process. The precursor powder was calcined at different temperatures. X-ray diffraction examination indicates that β-quartz is crystallized from the amorphous matrix around 850°C firstly and then MgO-Al2O3 spinel and α-cordierite appears. Above 1000°C, MgO-Al2O3 spinel and cristobalite disappear gradually and form an intermediate phase (sapphirine). At around 1300°C, the main phase is α-cordierite, and no other phase is detected.
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XIE Zhi-yong: Born in 1978
Funded by the National Natural Science Foundation of China (50072014)
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Zhi-yong, X., Hui, L., Ming-xia, X. et al. Synthesis of Cordierite by decomposition of metal nitrates on the surface of carbon black powder. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 19, 103–105 (2004). https://doi.org/10.1007/BF02841382
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DOI: https://doi.org/10.1007/BF02841382