Non-isothermal crystallization kinetics of Fe{sub 2}O{sub 3}–CaO–SiO{sub 2} glass containing nucleation agent P{sub 2}O{sub 5}/TiO{sub 2}

Journal Article · Wed Mar 15 04:00:00 EDT 2017 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774517020080· OSTI ID:22645196

Li, Bin; Wang, Yongya; Luo, Wenqin; Li, Jingfen ^[1]; Li, Jianyou ^[2]

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1. Huzhou University, Department of Material Chemistry (China)
2. Huzhou Central Hospital, Orthopedic Department (China)

Fe{sub 2}O{sub 3}–CaO–SiO{sub 2} glass ceramics containing nucleation agent P{sub 2}O{sub 5}/TiO{sub 2} were prepared by sol-gel method. The samples were characterized by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The activation energy and kinetic parameters for crystallization of the samples were calculated by the Johnson-Mehi-Avrami (JMA) model and Augis-Bennett method according to the results of DSC. The results showed that the crystallization mechanism of Fe{sub 2}O{sub 3}–CaO–SiO{sub 2} glass, whose non-isothermal kinetic parameter n = 2.3, was consistent with surface crystallization of the JMA model. The kinetics model function of Fe{sub 2}O{sub 3}–CaO–SiO{sub 2} glass, f(α) = 2.3(1–α)[–ln(1–α)]{sup 0.57}, was also obtained. The addition of nucleation agent P{sub 2}O{sub 5}/TiO{sub 2} could reduce the activation energy, which made the crystal growth modes change from onedimensional to three-dimensional.

• OSTI ID: 22645196
• Journal Information: Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 2 Vol. 62; ISSN CYSTE3; ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
CALCIUM OXIDES
CRYSTAL GROWTH
CRYSTALLIZATION
FERRITES
IRON OXIDES
PHOSPHATES
PHOSPHORUS OXIDES
SILICA
SILICON OXIDES
THREE-DIMENSIONAL LATTICES
TITANIUM OXIDES
X-RAY DIFFRACTION