Physical Ageing of Silicate Glasses at Room Temperature: General Regularities as a Basis for the Theory and the Possibility of a priori Calculation of the Ageing Rate
Abstract A review has been presented of the poorly known data on the ageing of thermometric, optical, and other glasses at observation durations as long as 40 years. The correct mathematical processing of the data is carried out. It is shown that the volume relaxation is described by a simple expone...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Nemilov, S. V. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2000 |
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| Schlagwörter: |
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| Anmerkung: |
© MAIK “Nauka/Interperiodica” 2000 |
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| Übergeordnetes Werk: |
Enthalten in: Glass physics and chemistry - Kluwer Academic Publishers-Plenum Publishers, 1993, 26(2000), 6 vom: Nov., Seite 511-530 |
|---|---|
| Übergeordnetes Werk: |
volume:26 ; year:2000 ; number:6 ; month:11 ; pages:511-530 |
| Links: |
|---|
| DOI / URN: |
10.1023/A:1007168712556 |
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OLC2039264051 |
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| 520 | |a Abstract A review has been presented of the poorly known data on the ageing of thermometric, optical, and other glasses at observation durations as long as 40 years. The correct mathematical processing of the data is carried out. It is shown that the volume relaxation is described by a simple exponential function with the characteristic time τ varying from three weeks to fifteen years. The process can be complicated by a superposition of slower or faster processes whose characteristic times can differ from the characteristic time of the dominant process by 1.5–2 orders of magnitude. The compositions of the studied glasses (from borosilicate crowns to flints) and their viscosities in the annealing range are given. It is demonstrated that the main characteristic ageing time τ (in years) and the structural temperature T13.5 (corresponding to a viscosity of $ 10^{13.5} $ P) are related by the expression log τ= 0.0260T13.5 – 20.414, which makes it possible to calculate τ from T13.5 with an error of no more than 20%. The expression is theoretically justified under the assumption that the cooperative β-relaxation processes occur without α-relaxation. The possible relation between the ageing and annealing processes is revealed. This relation follows from the splitting of the stretched exponent relaxation function (which is valid at Tg /T ∼ 1) into Debye components at the ratios Tg /T ∼ 2.5–2.8, which, for silicate glasses, correspond to room temperature. | ||
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10.1023/A:1007168712556 doi (DE-627)OLC2039264051 (DE-He213)A:1007168712556-p DE-627 ger DE-627 rakwb eng 330 VZ Nemilov, S. V. verfasserin aut Physical Ageing of Silicate Glasses at Room Temperature: General Regularities as a Basis for the Theory and the Possibility of a priori Calculation of the Ageing Rate 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © MAIK “Nauka/Interperiodica” 2000 Abstract A review has been presented of the poorly known data on the ageing of thermometric, optical, and other glasses at observation durations as long as 40 years. The correct mathematical processing of the data is carried out. It is shown that the volume relaxation is described by a simple exponential function with the characteristic time τ varying from three weeks to fifteen years. The process can be complicated by a superposition of slower or faster processes whose characteristic times can differ from the characteristic time of the dominant process by 1.5–2 orders of magnitude. The compositions of the studied glasses (from borosilicate crowns to flints) and their viscosities in the annealing range are given. It is demonstrated that the main characteristic ageing time τ (in years) and the structural temperature T13.5 (corresponding to a viscosity of $ 10^{13.5} $ P) are related by the expression log τ= 0.0260T13.5 – 20.414, which makes it possible to calculate τ from T13.5 with an error of no more than 20%. The expression is theoretically justified under the assumption that the cooperative β-relaxation processes occur without α-relaxation. The possible relation between the ageing and annealing processes is revealed. This relation follows from the splitting of the stretched exponent relaxation function (which is valid at Tg /T ∼ 1) into Debye components at the ratios Tg /T ∼ 2.5–2.8, which, for silicate glasses, correspond to room temperature. Silicate Characteristic Time Ageing Rate Ageing Time Flint Enthalten in Glass physics and chemistry Kluwer Academic Publishers-Plenum Publishers, 1993 26(2000), 6 vom: Nov., Seite 511-530 (DE-627)182171957 (DE-600)1182895-X (DE-576)9182171955 1087-6596 nnns volume:26 year:2000 number:6 month:11 pages:511-530 https://doi.org/10.1023/A:1007168712556 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_31 GBV_ILN_32 GBV_ILN_70 AR 26 2000 6 11 511-530 |
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10.1023/A:1007168712556 doi (DE-627)OLC2039264051 (DE-He213)A:1007168712556-p DE-627 ger DE-627 rakwb eng 330 VZ Nemilov, S. V. verfasserin aut Physical Ageing of Silicate Glasses at Room Temperature: General Regularities as a Basis for the Theory and the Possibility of a priori Calculation of the Ageing Rate 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © MAIK “Nauka/Interperiodica” 2000 Abstract A review has been presented of the poorly known data on the ageing of thermometric, optical, and other glasses at observation durations as long as 40 years. The correct mathematical processing of the data is carried out. It is shown that the volume relaxation is described by a simple exponential function with the characteristic time τ varying from three weeks to fifteen years. The process can be complicated by a superposition of slower or faster processes whose characteristic times can differ from the characteristic time of the dominant process by 1.5–2 orders of magnitude. The compositions of the studied glasses (from borosilicate crowns to flints) and their viscosities in the annealing range are given. It is demonstrated that the main characteristic ageing time τ (in years) and the structural temperature T13.5 (corresponding to a viscosity of $ 10^{13.5} $ P) are related by the expression log τ= 0.0260T13.5 – 20.414, which makes it possible to calculate τ from T13.5 with an error of no more than 20%. The expression is theoretically justified under the assumption that the cooperative β-relaxation processes occur without α-relaxation. The possible relation between the ageing and annealing processes is revealed. This relation follows from the splitting of the stretched exponent relaxation function (which is valid at Tg /T ∼ 1) into Debye components at the ratios Tg /T ∼ 2.5–2.8, which, for silicate glasses, correspond to room temperature. Silicate Characteristic Time Ageing Rate Ageing Time Flint Enthalten in Glass physics and chemistry Kluwer Academic Publishers-Plenum Publishers, 1993 26(2000), 6 vom: Nov., Seite 511-530 (DE-627)182171957 (DE-600)1182895-X (DE-576)9182171955 1087-6596 nnns volume:26 year:2000 number:6 month:11 pages:511-530 https://doi.org/10.1023/A:1007168712556 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_31 GBV_ILN_32 GBV_ILN_70 AR 26 2000 6 11 511-530 |
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10.1023/A:1007168712556 doi (DE-627)OLC2039264051 (DE-He213)A:1007168712556-p DE-627 ger DE-627 rakwb eng 330 VZ Nemilov, S. V. verfasserin aut Physical Ageing of Silicate Glasses at Room Temperature: General Regularities as a Basis for the Theory and the Possibility of a priori Calculation of the Ageing Rate 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © MAIK “Nauka/Interperiodica” 2000 Abstract A review has been presented of the poorly known data on the ageing of thermometric, optical, and other glasses at observation durations as long as 40 years. The correct mathematical processing of the data is carried out. It is shown that the volume relaxation is described by a simple exponential function with the characteristic time τ varying from three weeks to fifteen years. The process can be complicated by a superposition of slower or faster processes whose characteristic times can differ from the characteristic time of the dominant process by 1.5–2 orders of magnitude. The compositions of the studied glasses (from borosilicate crowns to flints) and their viscosities in the annealing range are given. It is demonstrated that the main characteristic ageing time τ (in years) and the structural temperature T13.5 (corresponding to a viscosity of $ 10^{13.5} $ P) are related by the expression log τ= 0.0260T13.5 – 20.414, which makes it possible to calculate τ from T13.5 with an error of no more than 20%. The expression is theoretically justified under the assumption that the cooperative β-relaxation processes occur without α-relaxation. The possible relation between the ageing and annealing processes is revealed. This relation follows from the splitting of the stretched exponent relaxation function (which is valid at Tg /T ∼ 1) into Debye components at the ratios Tg /T ∼ 2.5–2.8, which, for silicate glasses, correspond to room temperature. Silicate Characteristic Time Ageing Rate Ageing Time Flint Enthalten in Glass physics and chemistry Kluwer Academic Publishers-Plenum Publishers, 1993 26(2000), 6 vom: Nov., Seite 511-530 (DE-627)182171957 (DE-600)1182895-X (DE-576)9182171955 1087-6596 nnns volume:26 year:2000 number:6 month:11 pages:511-530 https://doi.org/10.1023/A:1007168712556 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_31 GBV_ILN_32 GBV_ILN_70 AR 26 2000 6 11 511-530 |
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10.1023/A:1007168712556 doi (DE-627)OLC2039264051 (DE-He213)A:1007168712556-p DE-627 ger DE-627 rakwb eng 330 VZ Nemilov, S. V. verfasserin aut Physical Ageing of Silicate Glasses at Room Temperature: General Regularities as a Basis for the Theory and the Possibility of a priori Calculation of the Ageing Rate 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © MAIK “Nauka/Interperiodica” 2000 Abstract A review has been presented of the poorly known data on the ageing of thermometric, optical, and other glasses at observation durations as long as 40 years. The correct mathematical processing of the data is carried out. It is shown that the volume relaxation is described by a simple exponential function with the characteristic time τ varying from three weeks to fifteen years. The process can be complicated by a superposition of slower or faster processes whose characteristic times can differ from the characteristic time of the dominant process by 1.5–2 orders of magnitude. The compositions of the studied glasses (from borosilicate crowns to flints) and their viscosities in the annealing range are given. It is demonstrated that the main characteristic ageing time τ (in years) and the structural temperature T13.5 (corresponding to a viscosity of $ 10^{13.5} $ P) are related by the expression log τ= 0.0260T13.5 – 20.414, which makes it possible to calculate τ from T13.5 with an error of no more than 20%. The expression is theoretically justified under the assumption that the cooperative β-relaxation processes occur without α-relaxation. The possible relation between the ageing and annealing processes is revealed. This relation follows from the splitting of the stretched exponent relaxation function (which is valid at Tg /T ∼ 1) into Debye components at the ratios Tg /T ∼ 2.5–2.8, which, for silicate glasses, correspond to room temperature. Silicate Characteristic Time Ageing Rate Ageing Time Flint Enthalten in Glass physics and chemistry Kluwer Academic Publishers-Plenum Publishers, 1993 26(2000), 6 vom: Nov., Seite 511-530 (DE-627)182171957 (DE-600)1182895-X (DE-576)9182171955 1087-6596 nnns volume:26 year:2000 number:6 month:11 pages:511-530 https://doi.org/10.1023/A:1007168712556 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_31 GBV_ILN_32 GBV_ILN_70 AR 26 2000 6 11 511-530 |
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10.1023/A:1007168712556 doi (DE-627)OLC2039264051 (DE-He213)A:1007168712556-p DE-627 ger DE-627 rakwb eng 330 VZ Nemilov, S. V. verfasserin aut Physical Ageing of Silicate Glasses at Room Temperature: General Regularities as a Basis for the Theory and the Possibility of a priori Calculation of the Ageing Rate 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © MAIK “Nauka/Interperiodica” 2000 Abstract A review has been presented of the poorly known data on the ageing of thermometric, optical, and other glasses at observation durations as long as 40 years. The correct mathematical processing of the data is carried out. It is shown that the volume relaxation is described by a simple exponential function with the characteristic time τ varying from three weeks to fifteen years. The process can be complicated by a superposition of slower or faster processes whose characteristic times can differ from the characteristic time of the dominant process by 1.5–2 orders of magnitude. The compositions of the studied glasses (from borosilicate crowns to flints) and their viscosities in the annealing range are given. It is demonstrated that the main characteristic ageing time τ (in years) and the structural temperature T13.5 (corresponding to a viscosity of $ 10^{13.5} $ P) are related by the expression log τ= 0.0260T13.5 – 20.414, which makes it possible to calculate τ from T13.5 with an error of no more than 20%. The expression is theoretically justified under the assumption that the cooperative β-relaxation processes occur without α-relaxation. The possible relation between the ageing and annealing processes is revealed. This relation follows from the splitting of the stretched exponent relaxation function (which is valid at Tg /T ∼ 1) into Debye components at the ratios Tg /T ∼ 2.5–2.8, which, for silicate glasses, correspond to room temperature. Silicate Characteristic Time Ageing Rate Ageing Time Flint Enthalten in Glass physics and chemistry Kluwer Academic Publishers-Plenum Publishers, 1993 26(2000), 6 vom: Nov., Seite 511-530 (DE-627)182171957 (DE-600)1182895-X (DE-576)9182171955 1087-6596 nnns volume:26 year:2000 number:6 month:11 pages:511-530 https://doi.org/10.1023/A:1007168712556 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_31 GBV_ILN_32 GBV_ILN_70 AR 26 2000 6 11 511-530 |
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Nemilov, S. V. |
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10.1023/A:1007168712556 |
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330 |
| title_sort |
physical ageing of silicate glasses at room temperature: general regularities as a basis for the theory and the possibility of a priori calculation of the ageing rate |
| title_auth |
Physical Ageing of Silicate Glasses at Room Temperature: General Regularities as a Basis for the Theory and the Possibility of a priori Calculation of the Ageing Rate |
| abstract |
Abstract A review has been presented of the poorly known data on the ageing of thermometric, optical, and other glasses at observation durations as long as 40 years. The correct mathematical processing of the data is carried out. It is shown that the volume relaxation is described by a simple exponential function with the characteristic time τ varying from three weeks to fifteen years. The process can be complicated by a superposition of slower or faster processes whose characteristic times can differ from the characteristic time of the dominant process by 1.5–2 orders of magnitude. The compositions of the studied glasses (from borosilicate crowns to flints) and their viscosities in the annealing range are given. It is demonstrated that the main characteristic ageing time τ (in years) and the structural temperature T13.5 (corresponding to a viscosity of $ 10^{13.5} $ P) are related by the expression log τ= 0.0260T13.5 – 20.414, which makes it possible to calculate τ from T13.5 with an error of no more than 20%. The expression is theoretically justified under the assumption that the cooperative β-relaxation processes occur without α-relaxation. The possible relation between the ageing and annealing processes is revealed. This relation follows from the splitting of the stretched exponent relaxation function (which is valid at Tg /T ∼ 1) into Debye components at the ratios Tg /T ∼ 2.5–2.8, which, for silicate glasses, correspond to room temperature. © MAIK “Nauka/Interperiodica” 2000 |
| abstractGer |
Abstract A review has been presented of the poorly known data on the ageing of thermometric, optical, and other glasses at observation durations as long as 40 years. The correct mathematical processing of the data is carried out. It is shown that the volume relaxation is described by a simple exponential function with the characteristic time τ varying from three weeks to fifteen years. The process can be complicated by a superposition of slower or faster processes whose characteristic times can differ from the characteristic time of the dominant process by 1.5–2 orders of magnitude. The compositions of the studied glasses (from borosilicate crowns to flints) and their viscosities in the annealing range are given. It is demonstrated that the main characteristic ageing time τ (in years) and the structural temperature T13.5 (corresponding to a viscosity of $ 10^{13.5} $ P) are related by the expression log τ= 0.0260T13.5 – 20.414, which makes it possible to calculate τ from T13.5 with an error of no more than 20%. The expression is theoretically justified under the assumption that the cooperative β-relaxation processes occur without α-relaxation. The possible relation between the ageing and annealing processes is revealed. This relation follows from the splitting of the stretched exponent relaxation function (which is valid at Tg /T ∼ 1) into Debye components at the ratios Tg /T ∼ 2.5–2.8, which, for silicate glasses, correspond to room temperature. © MAIK “Nauka/Interperiodica” 2000 |
| abstract_unstemmed |
Abstract A review has been presented of the poorly known data on the ageing of thermometric, optical, and other glasses at observation durations as long as 40 years. The correct mathematical processing of the data is carried out. It is shown that the volume relaxation is described by a simple exponential function with the characteristic time τ varying from three weeks to fifteen years. The process can be complicated by a superposition of slower or faster processes whose characteristic times can differ from the characteristic time of the dominant process by 1.5–2 orders of magnitude. The compositions of the studied glasses (from borosilicate crowns to flints) and their viscosities in the annealing range are given. It is demonstrated that the main characteristic ageing time τ (in years) and the structural temperature T13.5 (corresponding to a viscosity of $ 10^{13.5} $ P) are related by the expression log τ= 0.0260T13.5 – 20.414, which makes it possible to calculate τ from T13.5 with an error of no more than 20%. The expression is theoretically justified under the assumption that the cooperative β-relaxation processes occur without α-relaxation. The possible relation between the ageing and annealing processes is revealed. This relation follows from the splitting of the stretched exponent relaxation function (which is valid at Tg /T ∼ 1) into Debye components at the ratios Tg /T ∼ 2.5–2.8, which, for silicate glasses, correspond to room temperature. © MAIK “Nauka/Interperiodica” 2000 |
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| title_short |
Physical Ageing of Silicate Glasses at Room Temperature: General Regularities as a Basis for the Theory and the Possibility of a priori Calculation of the Ageing Rate |
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