Toward An Understanding Of The Mechanical Mixed Alkali Effect In Glasses

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Toward An Understanding Of The Mechanical Mixed Alkali Effect In Glasses

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Author : Costas H. Tzinis
language : en
Publisher:
Release Date : 1979

Toward An Understanding Of The Mechanical Mixed Alkali Effect In Glasses written by Costas H. Tzinis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with categories.

The mechanical properties of mixed alkali glasses have been analyzed in order to determine their common features, including systematic variations with composition, and to define clearly the phenomena that must be explained. New assignments of the mechanical loss peaks are made, and approaches to developing a cooperative theory for the phenomena, especially the compositional variation of the peak temperatures and loss tangents, are presented and discussed. (Author).

An Approach To Understanding The Mixed Alkali Effect

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Author : George B. Rouse
language : en
Publisher:
Release Date : 1977

An Approach To Understanding The Mixed Alkali Effect written by George B. Rouse and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with categories.

An approach to understanding the mixed alkali effect in binary ionic oxide glasses is proposed. It is based on an expression for the composition dependence of activated processes which is inherently cooperative, and employs the regular solution model for the specification of this dependence. A detailed molecular-level model, using spectroscopic data, is introduced to obtain an estimate of the magnitude of the parameters of the approach. It is shown that the composition dependences of the non-linearly varying properties of mixed alkali systems, including both the measured properties and the exponential and pre-exponential factors obtained from their temperature dependence, can be understood using this approach. (Author).

Technical Abstract Bulletin

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Author : Defense Documentation Center (U.S.)
language : en
Publisher:
Release Date : 1967

Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Science categories.

Alkali Mobility And Mechanical Relaxation In Mixed Alkali Silicate Glasses

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Author : James W. Fleming (Jr.)
language : en
Publisher:
Release Date : 1971

Alkali Mobility And Mechanical Relaxation In Mixed Alkali Silicate Glasses written by James W. Fleming (Jr.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Alkalies categories.

"Internal friction and sodium and potassium self-diffusion coefficients for (1-X)Na2O·XK2O·3SiO2 glasses were measured. Alkali diffusion was measured between 300 and 500°C using radioactive isotopes and a thin-sectioning technique. Internal friction was measured from room temperature to 500°C, 0.1 to 2000 Hz. Comparison between alkali diffusion and internal friction data for Na-K glasses with those for other mixed-alkali glasses shows that the mixed-alkali peak is related to alkali mobility. It is concluded that the mechanism for mixed-alkali internal friction is a cooperative rearrangement of dissimilar alkali ions, with the slower moving ion controlling the rate of reorientation"--Abstract, leaf iii.

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1986

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Aeronautics categories.

Internal Friction Of Mixed Alkali Silicate Glasses

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Author : J. E. Shelby
language : en
Publisher:
Release Date : 1967

Internal Friction Of Mixed Alkali Silicate Glasses written by J. E. Shelby and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Alkalies categories.

"The mixed alkali effect in silicate glasses was examined from internal friction measurements made over the temperature range from -190 to 500°C and at a frequency of 0.4 Hz. Supplemental measurements of the activation energy for the different internal friction peaks, dynamic shear modulus, density, and index of refraction were also made. All measurements were confined to silicate glasses containing mixtures of Li-Na, Li-K, Li-Rb, Li-Cs, Na-K, Na-Rb, Na-Cs, and K-Rb. Rötger's interpretation of the internal friction of mixed-alkali silicate glasses is shown to be incorrect. A previously unreported internal friction peak was observed whenever two different alkali oxides were present simultaneously, The behavior of this peak in the different mixed alkali glasses is more easily correlated with the radius ratio of the two alkali ions present than with the mass ratio. A stress induced alkali ion position interchange is suggested as the probable mechanism responsible for this peak"--Abstract, leaf ii.

The Mixed Alkali Effect In Lithium Sodium Silicate Glasses

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Author : Anthony Manuel Asseiro
language : en
Publisher:
Release Date : 1991

The Mixed Alkali Effect In Lithium Sodium Silicate Glasses written by Anthony Manuel Asseiro and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Glass categories.

The Mixed Alkali Effect In Silicate And Borate Glasses

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Author : Rachel Diana Williams
language : en
Publisher:
Release Date : 1991

The Mixed Alkali Effect In Silicate And Borate Glasses written by Rachel Diana Williams and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.

An Investigation Of The Mixed Alkali Effect In Disilicate Glasses By Spectroscopic Methods

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Author : Angeline Tiong-Whei Yap
language : en
Publisher:
Release Date : 1996

An Investigation Of The Mixed Alkali Effect In Disilicate Glasses By Spectroscopic Methods written by Angeline Tiong-Whei Yap and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.

Volume Changes In Some Mixed Alkali Silicate Glasses And Their Influence On The Mixed Alkali Effect

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Author : Ronald Van Caporali
language : en
Publisher:
Release Date :

Volume Changes In Some Mixed Alkali Silicate Glasses And Their Influence On The Mixed Alkali Effect written by Ronald Van Caporali and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Glass categories.