Spectroscopic investigations of the kaolinite-mullite reaction sequence
(1978) Journal of the American Ceramic Society — Vol. 61, n° 1-2, p. 81-84 (1978)
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- Abstract
- The changes of Al coordination in the kaolinite-mullite thermal sequence in the presence of mineralizers were investigated. Small amounts of mineralizers added to kaolinite promoted, selectively (900 degrees ), either (a) direct mullite formation or (b) spinel. X-ray fluorescence measurements of the Al/b K/ alpha shift showed that, in case (a), the Al(IV) content decreases from the metakaolinite level to values found in 3:2 mullite (without intermediary spinel formation); in case (b) Al(IV) content decreases to values corresponding to pure gamma -Al/sub 2/O/sub 3/ (lower than in mullite). The formation of a mixed Al-Si spinel as a major product is excluded. Results are discussed in the light of complementary ESCA measurements.
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Bulens, M., Léonard, A., & Delmon, B. (1978). Spectroscopic investigations of the kaolinite-mullite reaction sequence. Journal of the American Ceramic Society, 61(1-2), 81-84. https://hdl.handle.net/2078.5/42005 (Original work published 1978)