Abstract
Nanocrystals of BaF 2 precipitate during controlled annealing of silicate glasses composed of SiO 2, Al 2O 3, K 2O, Na 2O, BaF 2 and BaO. Structural characteristics such as size, shape, volume fraction and size distribution of nanoparticles in the glass matrix were studied by anomalous small angle x-ray scattering (ASAXS). Fitted ASAXS curves near the Ba absorption edge reveal the formation of a core-shell structure. Furthermore, ASAXS results allowed to determine quantitatively the composition of the nanocrystals, the surrounding region (shell) and the matrix. The evaluated composition gives evidence for an enrichment of Si atoms in a shell, that surrounds the particles and acts as a diffusion barrier. Resonant curve analysis reveals the quantitative information of the Ba atoms used in the formation of BaF 2 nanoparticles.
| Original language | English |
|---|---|
| Pages (from-to) | 5215-5223 |
| Number of pages | 9 |
| Journal | CrystEngComm |
| Volume | 14 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - 21 Aug 2012 |
| Externally published | Yes |
Cite this
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Experimental evidence of a diffusion barrier around BaF 2 nanocrystals in a silicate glass system by ASAXS. / Raghuwanshi, Vikram Singh; Hoell, Armin; Bocker, Christian; Rüssel, Christian.
In: CrystEngComm, Vol. 14, No. 16, 21.08.2012, p. 5215-5223.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Experimental evidence of a diffusion barrier around BaF 2 nanocrystals in a silicate glass system by ASAXS
AU - Raghuwanshi, Vikram Singh
AU - Hoell, Armin
AU - Bocker, Christian
AU - Rüssel, Christian
PY - 2012/8/21
Y1 - 2012/8/21
N2 - Nanocrystals of BaF 2 precipitate during controlled annealing of silicate glasses composed of SiO 2, Al 2O 3, K 2O, Na 2O, BaF 2 and BaO. Structural characteristics such as size, shape, volume fraction and size distribution of nanoparticles in the glass matrix were studied by anomalous small angle x-ray scattering (ASAXS). Fitted ASAXS curves near the Ba absorption edge reveal the formation of a core-shell structure. Furthermore, ASAXS results allowed to determine quantitatively the composition of the nanocrystals, the surrounding region (shell) and the matrix. The evaluated composition gives evidence for an enrichment of Si atoms in a shell, that surrounds the particles and acts as a diffusion barrier. Resonant curve analysis reveals the quantitative information of the Ba atoms used in the formation of BaF 2 nanoparticles.
AB - Nanocrystals of BaF 2 precipitate during controlled annealing of silicate glasses composed of SiO 2, Al 2O 3, K 2O, Na 2O, BaF 2 and BaO. Structural characteristics such as size, shape, volume fraction and size distribution of nanoparticles in the glass matrix were studied by anomalous small angle x-ray scattering (ASAXS). Fitted ASAXS curves near the Ba absorption edge reveal the formation of a core-shell structure. Furthermore, ASAXS results allowed to determine quantitatively the composition of the nanocrystals, the surrounding region (shell) and the matrix. The evaluated composition gives evidence for an enrichment of Si atoms in a shell, that surrounds the particles and acts as a diffusion barrier. Resonant curve analysis reveals the quantitative information of the Ba atoms used in the formation of BaF 2 nanoparticles.
UR - http://www.scopus.com/inward/record.url?scp=84863925297&partnerID=8YFLogxK
U2 - 10.1039/c2ce06544d
DO - 10.1039/c2ce06544d
M3 - Article
VL - 14
SP - 5215
EP - 5223
JO - CrystEngComm
JF - CrystEngComm
SN - 1466-8033
IS - 16
ER -