메뉴 건너뛰기




Volumn 20, Issue 19, 2008, Pages 5987-5996

Solid state syntheses of 12SrO·7Al2O3 and formation of high density oxygen radical anions, O- and O 2-

Author keywords

[No Author keywords available]

Indexed keywords

ALUMINUM; ANNEALING; CRYSTAL STRUCTURE; ELECTROLYSIS; NEGATIVE IONS; NONMETALS; OXYGEN; PARAMAGNETIC RESONANCE; PARAMAGNETISM; POLES; POWDERS; RIETVELD ANALYSIS; RIETVELD METHOD; X RAY DIFFRACTION ANALYSIS;

EID: 54849425969     PISSN: 08974756     EISSN: None     Source Type: Journal    
DOI: 10.1021/cm800666p     Document Type: Article
Times cited : (34)

References (61)
  • 1
    • 0012230490 scopus 로고    scopus 로고
    • Mangabhai, R. J, Glasser, F. P. Eds, IOM Communications, London
    • Calcium Aluminate Cements 2001; Mangabhai, R. J., Glasser, F. P. Eds.; IOM Communications, London, 2001.
    • (2001) Calcium Aluminate Cements 2001
  • 2
    • 54849432838 scopus 로고    scopus 로고
    • In this paper, we use the term S12A7 to denote a crystalline phase that has a lattice framework composed of Sr and Al cations with a ratio of 12:14. The extra-framework anions are not specified, except those indicated in the text
    • 7" to denote a crystalline phase that has a lattice framework composed of Sr and Al cations with a ratio of 12:14. The extra-framework anions are not specified, except those indicated in the text.
  • 47
    • 54849408467 scopus 로고    scopus 로고
    • The present paper is cited as ref 14 herein
    • (b) The present paper is cited as ref 14 herein.
  • 51
    • 54849406262 scopus 로고    scopus 로고
    • If the OH- ion-incorporated S12A7 is assumed to be an equilibirum phase in the SrO-Al2O-H2O pesudoternary system, then Gibbs' phase law allows the S12A 7 phase to coexist in both S3A and SA phases, even if the total Sr:Al ratio in the system is exactly 12:14. Higher p(H 2U) may increase the equilibrium portion of S12A 7 among the three phases. Even if our reaction condition was within the equilibirum phase field of S12A7, we suppose the amounts of residual S3A and SA phases are still not determined by the equilibirum partition but determined by the inhomogeneity in the starting mixtures
    • 3A and SA phases are still not determined by the equilibirum partition but determined by the inhomogeneity in the starting mixtures.
  • 52
    • 54849418980 scopus 로고    scopus 로고
    • 2 was measured at 77 K.
    • 2 was measured at 77 K.
  • 53
    • 54849427587 scopus 로고    scopus 로고
    • Powdered sample was sprinkled on a carbon tape, and this was followed by sputtering of a Pt-Pd thin coating. A Hitachi S-4500 SEM was used for the observation.
    • Powdered sample was sprinkled on a carbon tape, and this was followed by sputtering of a Pt-Pd thin coating. A Hitachi S-4500 SEM was used for the observation.
  • 55
    • 54849432837 scopus 로고    scopus 로고
    • For example, if Sri and Sr2 were again unified to one Sr site and the other parameters were kept the same as in the analysis corresponding to Table 3 and Figure 4. The Rietveld fitting gave worse R factors (R I, 4.27 and RWP, 7.98) and abnormally large thermal parameters for the Sr site B, 1.25 Å2, As for the occupancies of Sri and Sr2 sites, an appropriate convergence was not achieved when these values were not fixed. Since they strongly correlate with their fraction coordinates and thermal parameters, they are most sensitively affected by the quality of the sample. We set these occupancies as ideal values
    • 2). As for the occupancies of Sri and Sr2 sites, an appropriate convergence was not achieved when these values were not fixed. Since they strongly correlate with their fraction coordinates and thermal parameters, they are most sensitively affected by the quality of the sample. We set these occupancies as ideal values.
  • 57
    • 54849420589 scopus 로고    scopus 로고
    • The hydrogen bond between the OH- ion and the framework O 2- ion causes a deviation in the OH- position from the cage center. Thus, each O-H⋯O distance in a OH, incorporated cage may be shorter by a few tenths of an angstrom than that (3.23 Å) evaluated using the statistical center position determined by Rietveld analysis
    • - -incorporated cage may be shorter by a few tenths of an angstrom than that (3.23 Å) evaluated using the statistical center position determined by Rietveld analysis.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.