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Volumn 67, Issue 9, 2003, Pages

Anelastic compression of nanometer-sized silica particles under high pressure: A high-energy x-ray diffraction measurement

Author keywords

[No Author keywords available]

Indexed keywords

SILICON DIOXIDE;

EID: 0037367971     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.67.092202     Document Type: Article
Times cited : (9)

References (39)
  • 13
    • 85038319720 scopus 로고    scopus 로고
    • L. Stixrude, in, edited by R. A. B. Devine, J.-P. Duraud, and E. Dooryhée, (Wiley, Chichester, 2000) 69–103
    • L. Stixrude, in Structure and Imperfections in Amorphous and Crystalline Silicon Dioxide, edited by R. A. B. Devine, J.-P. Duraud, and E. Dooryhée, (Wiley, Chichester, 2000) pp. 69–103.
  • 31
    • 85038348231 scopus 로고    scopus 로고
    • The total correlation function (formula presented) is often used in obtaining interatomic correlations by peak fitting procedures, where (formula presented) and (formula presented) is the mean number density derived from the density of the material. Since the present samples, compressed especially at 4 GPa, are still rather porous, we cannot obtain the true density of these samples and hence cannot derive (formula presented) as well. However, we can still use (formula presented) to obtain near-neighbor bond distances
    • The total correlation function (formula presented) is often used in obtaining interatomic correlations by peak fitting procedures, where (formula presented) and (formula presented) is the mean number density derived from the density of the material. Since the present samples, compressed especially at 4 GPa, are still rather porous, we cannot obtain the true density of these samples and hence cannot derive (formula presented) as well. However, we can still use (formula presented) to obtain near-neighbor bond distances.
  • 33
    • 85038280064 scopus 로고    scopus 로고
    • However, we see a slight difference in Si-Si nearest neighbor correlations in (formula presented) between bulk (formula presented) and fumed silica. The Si-Si correlation in fumed silica appears to have an additional distribution on the longer distance side as compared with that in bulk (formula presented) suggesting a subtle structural difference between bulk (formula presented) and fumed silica
    • However, we see a slight difference in Si-Si nearest neighbor correlations in (formula presented) between bulk (formula presented) and fumed silica. The Si-Si correlation in fumed silica appears to have an additional distribution on the longer distance side as compared with that in bulk (formula presented) suggesting a subtle structural difference between bulk (formula presented) and fumed silica.
  • 35
    • 85038332175 scopus 로고    scopus 로고
    • We also compressed the silica powders whose grain size is 10–100 μm. However, anelastic compression has not been observed for these silica powders even after compression at 8 GPa. This indicates that the irreversible compaction is peculiar only to nanometer-sized silica particles, and the present phenomena cannot simply be explained in terms of the inhomogeneous pressure distribution among the fine particles under compression
    • We also compressed the silica powders whose grain size is 10–100 μm. However, anelastic compression has not been observed for these silica powders even after compression at 8 GPa. This indicates that the irreversible compaction is peculiar only to nanometer-sized silica particles, and the present phenomena cannot simply be explained in terms of the inhomogeneous pressure distribution among the fine particles under compression.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.