The effects of amorphous phase separation on crystal nucleation kinetics in BaO-$ SiO_{2} $ glasses
Abstract The nucleation kinetics of barium disilicate spherulites were determined by optical microscopy in BaO-$ SiO_{2} $ glasses containing 27.0 to 33.3 mol % BaO for isothermal treatments at 718 to 760‡ C. Amorphous phase separation in two glasses was studied by small-angle X-ray scattering (SAXS...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Zanotto, E. D. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1986 |
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| Schlagwörter: |
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| Anmerkung: |
© Chapman and Hall Ltd. 1986 |
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| Übergeordnetes Werk: |
Enthalten in: Journal of materials science - Kluwer Academic Publishers, 1966, 21(1986), 9 vom: Sept., Seite 3050-3064 |
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| Übergeordnetes Werk: |
volume:21 ; year:1986 ; number:9 ; month:09 ; pages:3050-3064 |
| Links: |
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| DOI / URN: |
10.1007/BF00553336 |
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| Katalog-ID: |
OLC2046141865 |
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| 245 | 1 | 0 | |a The effects of amorphous phase separation on crystal nucleation kinetics in BaO-$ SiO_{2} $ glasses |
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| 520 | |a Abstract The nucleation kinetics of barium disilicate spherulites were determined by optical microscopy in BaO-$ SiO_{2} $ glasses containing 27.0 to 33.3 mol % BaO for isothermal treatments at 718 to 760‡ C. Amorphous phase separation in two glasses was studied by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The average diameter, number and surface area of amorphous droplets were obtained by SAXS as a function of time at 743 and 760‡ C. In glasses not showing amorphous phase separation the crystal nucleation rate,I, was constant at a given temperature. In glasses undergoing phase separation,I increased with time approaching a constant value, which was identical for different phase-separated glasses. There was a striking correlation between the time to reach a constantI and the time required to attain the equilibrium composition of the amorphous (baria-rich) matrix phase, as revealed by a constant integrated SAXS intensity. The crystal nucleation rate,I, depended primarily on the composition of the baria-rich phase. There was no apparent relationship betweenI and the surface area or number of droplets from SAXS. However, possible evidence of additional crystal nucleation at droplet interfaces was found, although the effect was small. Viscosities and crystal growth rates for the phase-separated glasses are also discussed. | ||
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| 700 | 1 | |a Craievich, A. F. |4 aut | |
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10.1007/BF00553336 doi (DE-627)OLC2046141865 (DE-He213)BF00553336-p DE-627 ger DE-627 rakwb eng 670 VZ Zanotto, E. D. verfasserin aut The effects of amorphous phase separation on crystal nucleation kinetics in BaO-$ SiO_{2} $ glasses 1986 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Chapman and Hall Ltd. 1986 Abstract The nucleation kinetics of barium disilicate spherulites were determined by optical microscopy in BaO-$ SiO_{2} $ glasses containing 27.0 to 33.3 mol % BaO for isothermal treatments at 718 to 760‡ C. Amorphous phase separation in two glasses was studied by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The average diameter, number and surface area of amorphous droplets were obtained by SAXS as a function of time at 743 and 760‡ C. In glasses not showing amorphous phase separation the crystal nucleation rate,I, was constant at a given temperature. In glasses undergoing phase separation,I increased with time approaching a constant value, which was identical for different phase-separated glasses. There was a striking correlation between the time to reach a constantI and the time required to attain the equilibrium composition of the amorphous (baria-rich) matrix phase, as revealed by a constant integrated SAXS intensity. The crystal nucleation rate,I, depended primarily on the composition of the baria-rich phase. There was no apparent relationship betweenI and the surface area or number of droplets from SAXS. However, possible evidence of additional crystal nucleation at droplet interfaces was found, although the effect was small. Viscosities and crystal growth rates for the phase-separated glasses are also discussed. Phase Separation Nucleation Rate Crystal Nucleation Crystal Growth Rate Nucleation Temperature James, P. F. aut Craievich, A. F. aut Enthalten in Journal of materials science Kluwer Academic Publishers, 1966 21(1986), 9 vom: Sept., Seite 3050-3064 (DE-627)129546372 (DE-600)218324-9 (DE-576)014996774 0022-2461 nnns volume:21 year:1986 number:9 month:09 pages:3050-3064 https://doi.org/10.1007/BF00553336 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2057 GBV_ILN_2333 GBV_ILN_4082 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4319 GBV_ILN_4323 GBV_ILN_4700 AR 21 1986 9 09 3050-3064 |
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10.1007/BF00553336 doi (DE-627)OLC2046141865 (DE-He213)BF00553336-p DE-627 ger DE-627 rakwb eng 670 VZ Zanotto, E. D. verfasserin aut The effects of amorphous phase separation on crystal nucleation kinetics in BaO-$ SiO_{2} $ glasses 1986 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Chapman and Hall Ltd. 1986 Abstract The nucleation kinetics of barium disilicate spherulites were determined by optical microscopy in BaO-$ SiO_{2} $ glasses containing 27.0 to 33.3 mol % BaO for isothermal treatments at 718 to 760‡ C. Amorphous phase separation in two glasses was studied by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The average diameter, number and surface area of amorphous droplets were obtained by SAXS as a function of time at 743 and 760‡ C. In glasses not showing amorphous phase separation the crystal nucleation rate,I, was constant at a given temperature. In glasses undergoing phase separation,I increased with time approaching a constant value, which was identical for different phase-separated glasses. There was a striking correlation between the time to reach a constantI and the time required to attain the equilibrium composition of the amorphous (baria-rich) matrix phase, as revealed by a constant integrated SAXS intensity. The crystal nucleation rate,I, depended primarily on the composition of the baria-rich phase. There was no apparent relationship betweenI and the surface area or number of droplets from SAXS. However, possible evidence of additional crystal nucleation at droplet interfaces was found, although the effect was small. Viscosities and crystal growth rates for the phase-separated glasses are also discussed. Phase Separation Nucleation Rate Crystal Nucleation Crystal Growth Rate Nucleation Temperature James, P. F. aut Craievich, A. F. aut Enthalten in Journal of materials science Kluwer Academic Publishers, 1966 21(1986), 9 vom: Sept., Seite 3050-3064 (DE-627)129546372 (DE-600)218324-9 (DE-576)014996774 0022-2461 nnns volume:21 year:1986 number:9 month:09 pages:3050-3064 https://doi.org/10.1007/BF00553336 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2057 GBV_ILN_2333 GBV_ILN_4082 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4319 GBV_ILN_4323 GBV_ILN_4700 AR 21 1986 9 09 3050-3064 |
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10.1007/BF00553336 doi (DE-627)OLC2046141865 (DE-He213)BF00553336-p DE-627 ger DE-627 rakwb eng 670 VZ Zanotto, E. D. verfasserin aut The effects of amorphous phase separation on crystal nucleation kinetics in BaO-$ SiO_{2} $ glasses 1986 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Chapman and Hall Ltd. 1986 Abstract The nucleation kinetics of barium disilicate spherulites were determined by optical microscopy in BaO-$ SiO_{2} $ glasses containing 27.0 to 33.3 mol % BaO for isothermal treatments at 718 to 760‡ C. Amorphous phase separation in two glasses was studied by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The average diameter, number and surface area of amorphous droplets were obtained by SAXS as a function of time at 743 and 760‡ C. In glasses not showing amorphous phase separation the crystal nucleation rate,I, was constant at a given temperature. In glasses undergoing phase separation,I increased with time approaching a constant value, which was identical for different phase-separated glasses. There was a striking correlation between the time to reach a constantI and the time required to attain the equilibrium composition of the amorphous (baria-rich) matrix phase, as revealed by a constant integrated SAXS intensity. The crystal nucleation rate,I, depended primarily on the composition of the baria-rich phase. There was no apparent relationship betweenI and the surface area or number of droplets from SAXS. However, possible evidence of additional crystal nucleation at droplet interfaces was found, although the effect was small. Viscosities and crystal growth rates for the phase-separated glasses are also discussed. Phase Separation Nucleation Rate Crystal Nucleation Crystal Growth Rate Nucleation Temperature James, P. F. aut Craievich, A. F. aut Enthalten in Journal of materials science Kluwer Academic Publishers, 1966 21(1986), 9 vom: Sept., Seite 3050-3064 (DE-627)129546372 (DE-600)218324-9 (DE-576)014996774 0022-2461 nnns volume:21 year:1986 number:9 month:09 pages:3050-3064 https://doi.org/10.1007/BF00553336 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2057 GBV_ILN_2333 GBV_ILN_4082 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4319 GBV_ILN_4323 GBV_ILN_4700 AR 21 1986 9 09 3050-3064 |
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10.1007/BF00553336 doi (DE-627)OLC2046141865 (DE-He213)BF00553336-p DE-627 ger DE-627 rakwb eng 670 VZ Zanotto, E. D. verfasserin aut The effects of amorphous phase separation on crystal nucleation kinetics in BaO-$ SiO_{2} $ glasses 1986 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Chapman and Hall Ltd. 1986 Abstract The nucleation kinetics of barium disilicate spherulites were determined by optical microscopy in BaO-$ SiO_{2} $ glasses containing 27.0 to 33.3 mol % BaO for isothermal treatments at 718 to 760‡ C. Amorphous phase separation in two glasses was studied by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The average diameter, number and surface area of amorphous droplets were obtained by SAXS as a function of time at 743 and 760‡ C. In glasses not showing amorphous phase separation the crystal nucleation rate,I, was constant at a given temperature. In glasses undergoing phase separation,I increased with time approaching a constant value, which was identical for different phase-separated glasses. There was a striking correlation between the time to reach a constantI and the time required to attain the equilibrium composition of the amorphous (baria-rich) matrix phase, as revealed by a constant integrated SAXS intensity. The crystal nucleation rate,I, depended primarily on the composition of the baria-rich phase. There was no apparent relationship betweenI and the surface area or number of droplets from SAXS. However, possible evidence of additional crystal nucleation at droplet interfaces was found, although the effect was small. Viscosities and crystal growth rates for the phase-separated glasses are also discussed. Phase Separation Nucleation Rate Crystal Nucleation Crystal Growth Rate Nucleation Temperature James, P. F. aut Craievich, A. F. aut Enthalten in Journal of materials science Kluwer Academic Publishers, 1966 21(1986), 9 vom: Sept., Seite 3050-3064 (DE-627)129546372 (DE-600)218324-9 (DE-576)014996774 0022-2461 nnns volume:21 year:1986 number:9 month:09 pages:3050-3064 https://doi.org/10.1007/BF00553336 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2057 GBV_ILN_2333 GBV_ILN_4082 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4319 GBV_ILN_4323 GBV_ILN_4700 AR 21 1986 9 09 3050-3064 |
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10.1007/BF00553336 doi (DE-627)OLC2046141865 (DE-He213)BF00553336-p DE-627 ger DE-627 rakwb eng 670 VZ Zanotto, E. D. verfasserin aut The effects of amorphous phase separation on crystal nucleation kinetics in BaO-$ SiO_{2} $ glasses 1986 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Chapman and Hall Ltd. 1986 Abstract The nucleation kinetics of barium disilicate spherulites were determined by optical microscopy in BaO-$ SiO_{2} $ glasses containing 27.0 to 33.3 mol % BaO for isothermal treatments at 718 to 760‡ C. Amorphous phase separation in two glasses was studied by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The average diameter, number and surface area of amorphous droplets were obtained by SAXS as a function of time at 743 and 760‡ C. In glasses not showing amorphous phase separation the crystal nucleation rate,I, was constant at a given temperature. In glasses undergoing phase separation,I increased with time approaching a constant value, which was identical for different phase-separated glasses. There was a striking correlation between the time to reach a constantI and the time required to attain the equilibrium composition of the amorphous (baria-rich) matrix phase, as revealed by a constant integrated SAXS intensity. The crystal nucleation rate,I, depended primarily on the composition of the baria-rich phase. There was no apparent relationship betweenI and the surface area or number of droplets from SAXS. However, possible evidence of additional crystal nucleation at droplet interfaces was found, although the effect was small. Viscosities and crystal growth rates for the phase-separated glasses are also discussed. Phase Separation Nucleation Rate Crystal Nucleation Crystal Growth Rate Nucleation Temperature James, P. F. aut Craievich, A. F. aut Enthalten in Journal of materials science Kluwer Academic Publishers, 1966 21(1986), 9 vom: Sept., Seite 3050-3064 (DE-627)129546372 (DE-600)218324-9 (DE-576)014996774 0022-2461 nnns volume:21 year:1986 number:9 month:09 pages:3050-3064 https://doi.org/10.1007/BF00553336 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2057 GBV_ILN_2333 GBV_ILN_4082 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4319 GBV_ILN_4323 GBV_ILN_4700 AR 21 1986 9 09 3050-3064 |
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Enthalten in Journal of materials science 21(1986), 9 vom: Sept., Seite 3050-3064 volume:21 year:1986 number:9 month:09 pages:3050-3064 |
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The effects of amorphous phase separation on crystal nucleation kinetics in BaO-$ SiO_{2} $ glasses |
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Abstract The nucleation kinetics of barium disilicate spherulites were determined by optical microscopy in BaO-$ SiO_{2} $ glasses containing 27.0 to 33.3 mol % BaO for isothermal treatments at 718 to 760‡ C. Amorphous phase separation in two glasses was studied by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The average diameter, number and surface area of amorphous droplets were obtained by SAXS as a function of time at 743 and 760‡ C. In glasses not showing amorphous phase separation the crystal nucleation rate,I, was constant at a given temperature. In glasses undergoing phase separation,I increased with time approaching a constant value, which was identical for different phase-separated glasses. There was a striking correlation between the time to reach a constantI and the time required to attain the equilibrium composition of the amorphous (baria-rich) matrix phase, as revealed by a constant integrated SAXS intensity. The crystal nucleation rate,I, depended primarily on the composition of the baria-rich phase. There was no apparent relationship betweenI and the surface area or number of droplets from SAXS. However, possible evidence of additional crystal nucleation at droplet interfaces was found, although the effect was small. Viscosities and crystal growth rates for the phase-separated glasses are also discussed. © Chapman and Hall Ltd. 1986 |
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Abstract The nucleation kinetics of barium disilicate spherulites were determined by optical microscopy in BaO-$ SiO_{2} $ glasses containing 27.0 to 33.3 mol % BaO for isothermal treatments at 718 to 760‡ C. Amorphous phase separation in two glasses was studied by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The average diameter, number and surface area of amorphous droplets were obtained by SAXS as a function of time at 743 and 760‡ C. In glasses not showing amorphous phase separation the crystal nucleation rate,I, was constant at a given temperature. In glasses undergoing phase separation,I increased with time approaching a constant value, which was identical for different phase-separated glasses. There was a striking correlation between the time to reach a constantI and the time required to attain the equilibrium composition of the amorphous (baria-rich) matrix phase, as revealed by a constant integrated SAXS intensity. The crystal nucleation rate,I, depended primarily on the composition of the baria-rich phase. There was no apparent relationship betweenI and the surface area or number of droplets from SAXS. However, possible evidence of additional crystal nucleation at droplet interfaces was found, although the effect was small. Viscosities and crystal growth rates for the phase-separated glasses are also discussed. © Chapman and Hall Ltd. 1986 |
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Abstract The nucleation kinetics of barium disilicate spherulites were determined by optical microscopy in BaO-$ SiO_{2} $ glasses containing 27.0 to 33.3 mol % BaO for isothermal treatments at 718 to 760‡ C. Amorphous phase separation in two glasses was studied by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The average diameter, number and surface area of amorphous droplets were obtained by SAXS as a function of time at 743 and 760‡ C. In glasses not showing amorphous phase separation the crystal nucleation rate,I, was constant at a given temperature. In glasses undergoing phase separation,I increased with time approaching a constant value, which was identical for different phase-separated glasses. There was a striking correlation between the time to reach a constantI and the time required to attain the equilibrium composition of the amorphous (baria-rich) matrix phase, as revealed by a constant integrated SAXS intensity. The crystal nucleation rate,I, depended primarily on the composition of the baria-rich phase. There was no apparent relationship betweenI and the surface area or number of droplets from SAXS. However, possible evidence of additional crystal nucleation at droplet interfaces was found, although the effect was small. Viscosities and crystal growth rates for the phase-separated glasses are also discussed. © Chapman and Hall Ltd. 1986 |
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