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1 gru 2021 · The aluminum structures in the CaO–Al 2 O 3 and CaO–Al 2 O 3 –SiO 2 system were studied by a combination of Raman spectroscopy and 27 Al MAS-NMR spectroscopy, and the integrated Raman intensities of Al–O groups were calibrated by 27 Al MAS-NMR.
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The composition of the primary crystal region of the gehlenite sample was CaO: SiO2:Al2O3 = 38:28:34 (mass%), which was maintained after melting and cooling. After polishing the samples, the...
Ternary phase diagram for the CaO–Al 2 O 3 –SiO 2 system highlighting the different regions where a given oxide component crystallizes from the corresponding melt. 2 Cement notation is...
17 gru 2019 · Increased Ca content promotes low-Al, high-Ca chain-structured “C-S-H-type” products exhibiting significant nanostructural ordering, low levels of chain cross-linking, predominant Ca coordination of nonbridging oxygen atoms, and an increase in proton association with CaO layers to form Ca–OH sites.
31 maj 2009 · Research papers dealing with the identity and abundance as well as the structure of aluminium-bearing species present in pure and homogeneous, strongly alkaline aluminate solutions (often called synthetic Bayer liquors) published in the open literature since the 1970's have been reviewed.
22 kwi 2024 · The crystallization behavior, viscosity and structure of CaO–SiO 2 –MgO–Al 2 O 3 melts with different Al 2 O 3 contents and CaO/SiO 2 mass ratios were investigated. The local structures of oxide glasses were determined by Raman spectroscopy to correlate their crystallization behaviors.
