The chemistry of simple ceramic glazes—III. A MASNMR study of simulated feldspars and their reactions with CaO, SrO, BaO or Li2O on heating to 1300°C

作者: Arvind-Pal S. Mandair , William R. McWhinnie

DOI: 10.1016/S0277-5387(00)83547-0

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摘要: Abstract The influence of additions CaO, SrO, BaO or Li 2 O to a synthetic albite feldspar glass was investigated by 29 Si, 27 Al and 23 Na MASNMR spectroscopy. All oxides induce more ordering the “SiO 4 ”, “AlO ” tetrahedra in when present greater (CaO > 60 mol % relative SiO ) lesser (Li 30 %) proportions. Larger CaO (80, 100 induced crystallization calcium silicate phases but similar SrO stabilized phase. data suggested that large caused separation an aluminate phase; also revealed presence octahedral 3+ sites for all MO (M = Ca, Sr, Ba), however, no aluminium seen LiO . apparent chemical shift generally moved lower field as proportion increased.

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