Excess oxygen in 12CaO·7Al2O3 studied by thermogravimetric analysis

Katsuro Hayashi; Masahiro Hirano; Hideo Hosono

doi:10.1246/cl.2005.586

Excess oxygen in 12CaO·7Al₂O₃ studied by thermogravimetric analysis

Katsuro Hayashi, Masahiro Hirano, Hideo Hosono

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27 Citations (Scopus)

Abstract

Oxygen radial (O2^-, O^-)-accommodated 12CaO·7Al₂O₃ (CI2A7) releases oxygen molecules at about 800 C when heated in helium. The corresponding weight loss nearly accords with that calculated from an amount of the accommodated radicals, providing solid evidence that they are formed by an oxygen gas uptake from the atmosphere. Small difference between the observed and calculated losses suggests the presence of peroxide ion, O₂^2-, which is confirmed by the enhancement of 770 cm^-1 band in Raman spectra of the radical-accommodated samples.

Original language	English
Pages (from-to)	586-587
Number of pages	2
Journal	Chemistry Letters
Volume	34
Issue number	4
DOIs	https://doi.org/10.1246/cl.2005.586
Publication status	Published - Apr 5 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemistry(all)

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10.1246/cl.2005.586

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abstract = "Oxygen radial (O2-, O-)-accommodated 12CaO·7Al2O3 (CI2A7) releases oxygen molecules at about 800 C when heated in helium. The corresponding weight loss nearly accords with that calculated from an amount of the accommodated radicals, providing solid evidence that they are formed by an oxygen gas uptake from the atmosphere. Small difference between the observed and calculated losses suggests the presence of peroxide ion, O22-, which is confirmed by the enhancement of 770 cm-1 band in Raman spectra of the radical-accommodated samples.",

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year = "2005",

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AU - Hirano, Masahiro

AU - Hosono, Hideo

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Y1 - 2005/4/5

N2 - Oxygen radial (O2-, O-)-accommodated 12CaO·7Al2O3 (CI2A7) releases oxygen molecules at about 800 C when heated in helium. The corresponding weight loss nearly accords with that calculated from an amount of the accommodated radicals, providing solid evidence that they are formed by an oxygen gas uptake from the atmosphere. Small difference between the observed and calculated losses suggests the presence of peroxide ion, O22-, which is confirmed by the enhancement of 770 cm-1 band in Raman spectra of the radical-accommodated samples.

AB - Oxygen radial (O2-, O-)-accommodated 12CaO·7Al2O3 (CI2A7) releases oxygen molecules at about 800 C when heated in helium. The corresponding weight loss nearly accords with that calculated from an amount of the accommodated radicals, providing solid evidence that they are formed by an oxygen gas uptake from the atmosphere. Small difference between the observed and calculated losses suggests the presence of peroxide ion, O22-, which is confirmed by the enhancement of 770 cm-1 band in Raman spectra of the radical-accommodated samples.

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JO - Chemistry Letters

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IS - 4

ER -

Excess oxygen in 12CaO·7Al₂O₃ studied by thermogravimetric analysis

Abstract

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