О теpмодинамике пеpеохлажденных жидкостей и стекол
Термодинамика стеклообразующих жидкостей и стекол рассматривается с учетом вклада
 гетерофазных флуктуации в свободную энергию. Гетерофазными флуктуациями в жидкости
 являются зародыши некристаллического твердого тела, а в стекле - зародыши жидкой фазы.
 Твердотельное кристал...
Збережено в:
| Опубліковано в: : | Физика низких температур |
|---|---|
| Дата: | 1998 |
| Автор: | |
| Формат: | Стаття |
| Мова: | Російська |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
1998
|
| Теми: | |
| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/176357 |
| Теги: |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | О теpмодинамике пеpеохлажденных жидкостей и стекол / А.С. Бакай // Физика низких температур. — 1998. — Т. 24, № 1. — С. 27-46. — Бібліогр.: 40 назв. — рос. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1860253406080270336 |
|---|---|
| author | Бакай, А.С. |
| author_facet | Бакай, А.С. |
| citation_txt | О теpмодинамике пеpеохлажденных жидкостей и стекол / А.С. Бакай // Физика низких температур. — 1998. — Т. 24, № 1. — С. 27-46. — Бібліогр.: 40 назв. — рос. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | Термодинамика стеклообразующих жидкостей и стекол рассматривается с учетом вклада
гетерофазных флуктуации в свободную энергию. Гетерофазными флуктуациями в жидкости
являются зародыши некристаллического твердого тела, а в стекле - зародыши жидкой фазы.
Твердотельное кристаллическое состояние исключается из рассмотрения. Описание свободной
энергии основано на использовании капельной модели и модели смешанного состояния. Показано,
что на плоскости (P, T) существуют три области стабильности различных структурных состояний
рассматриваемой системы. Две из них — области стабильности капельных структурных состоянии, в
которых гетерофазные флуктуации имеют форму изолированных капель. В третьей области
стабильным является смешанное состояние, в нем сосуществуют два бесконечных взаимно
протекающих кластера, жидкий и некристаллический твердотельный. Ширина температурного
интервала, [Tt1, Tt2], в котором смешанное состояние стабильно, увеличивается с ростом
конфигурационной энтропии (сложности) некристаллической твердотельной фракции. В
использованном подходе обнаружены слабые фазовые переходы первого рода при Т = Tt1 и Т = Тt2.
Показано, что в смешанном состоянии возможны фазовые переходы первого или второго рода.
Приведены критерии наличия этих фазовых переходов. Получены уравнения состояния и выражения
для термодинамических величин (энтропии, теплоемкости, сжимаемости и коэффициента теплового
расширения) для капельных и смешанного состояний.
Термодинаміка стеклоутворюючих р.дин х стекол розглядається з урахуванням внеску
гетерофазних флуктуацій в вільну енергію. Гетерофазними флуктуаціями в рідині є зародки
некристалічного твердого тіла, а в склі - зародки рідкої фази. Твердотільнии кристалічний стан
виключено з розгляду. Опис вільної енергії грунтується на застосуванні краплинної моделі і моделі
змішаного стану. Показано, що на площині (P, T) існують три області стабільності різних
структурних станів системи, що розглядається. Дві з них - області стабільності краплинних
структурних станів, в яких гетерофазні флуктуації мають форму ізольованих крапель. В третій
області стабільним є змішаний стан, в ньому співіснують два нескінченних взаємно протікаючих
кластери, рідкий і некристалічнии твердотільнии. Ширина температурного інтервалу, [Tt1, Tt2], в
якому змішаний стан є стабільним, збільшується з ростом конфігураційної ентропії (складності)
некристалічної твердотільної фракції. В межах застосованого підходу знайдено слабкі фазові
переходи першого роду при Т = Tt1 і при Т = Тt2. Показано, що в змішаному стані можливі фазові
переходи першого або другого роду. Знайдено критерії наявності цих фазових переходів. Одержано
рівняння стану і вирази для термодинамічних величин (ентропії, теплоємності, стисливості і
коефіцієнта теплового розширення) для краплинних і змішаного станів.
Theomodynamics of glass-forming liquids and
glasses is considered taking into account the contributions of heterophase fluctuations to tree energy.
The heterophase fluctuations in liquids are nuclei of
non-crystalline solids. In glass the heterophase fluctuations are nuclei of liquid. The crystalline solid
state is not considered. The droplet approach and
the mixed state model are applied to describe free
energy. It is shown that there exist three regions of
stability of different structure states of the system in
the plane (P, T). Two of them are the stability regions of the droplet structure states. In the third one
the mixed state is stable. In the droplet states the
heterophase fluctuations exist as isolated droplets.
In the mixed state two infinite percolating clusters
(solid and liquid) are coexisting. The widths of the
temperature interval, [Tt1, Tt2], where the mixed
state is stable increase with the growth of the configurational entropy (complexity) of the non-crystalline solid fraction. In the frame of the approach used
weak 1st order phase transitions are revealed at
Т = Tt1 and Т = Тt2. It is shown that in the mixed
state the 1st order or 2nd order phase transitions are
possible. The criteria of these phase, transitions are
obtained. Equations of state and expressions of thermodynamic quantities (entropy, specific heat capacity, compressibility and thermal expansion coefficient) in the droplet and mixed states are derived.
|
| first_indexed | 2025-12-07T18:46:07Z |
| format | Article |
| fulltext |
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| id | nasplib_isofts_kiev_ua-123456789-176357 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | Russian |
| last_indexed | 2025-12-07T18:46:07Z |
| publishDate | 1998 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Бакай, А.С. 2021-02-04T13:37:56Z 2021-02-04T13:37:56Z 1998 О теpмодинамике пеpеохлажденных жидкостей и стекол / А.С. Бакай // Физика низких температур. — 1998. — Т. 24, № 1. — С. 27-46. — Бібліогр.: 40 назв. — рос. 0132-6414 PACS: 64.70.Dv https://nasplib.isofts.kiev.ua/handle/123456789/176357 Термодинамика стеклообразующих жидкостей и стекол рассматривается с учетом вклада
 гетерофазных флуктуации в свободную энергию. Гетерофазными флуктуациями в жидкости
 являются зародыши некристаллического твердого тела, а в стекле - зародыши жидкой фазы.
 Твердотельное кристаллическое состояние исключается из рассмотрения. Описание свободной
 энергии основано на использовании капельной модели и модели смешанного состояния. Показано,
 что на плоскости (P, T) существуют три области стабильности различных структурных состояний
 рассматриваемой системы. Две из них — области стабильности капельных структурных состоянии, в
 которых гетерофазные флуктуации имеют форму изолированных капель. В третьей области
 стабильным является смешанное состояние, в нем сосуществуют два бесконечных взаимно
 протекающих кластера, жидкий и некристаллический твердотельный. Ширина температурного
 интервала, [Tt1, Tt2], в котором смешанное состояние стабильно, увеличивается с ростом
 конфигурационной энтропии (сложности) некристаллической твердотельной фракции. В
 использованном подходе обнаружены слабые фазовые переходы первого рода при Т = Tt1 и Т = Тt2.
 Показано, что в смешанном состоянии возможны фазовые переходы первого или второго рода.
 Приведены критерии наличия этих фазовых переходов. Получены уравнения состояния и выражения
 для термодинамических величин (энтропии, теплоемкости, сжимаемости и коэффициента теплового
 расширения) для капельных и смешанного состояний. Термодинаміка стеклоутворюючих р.дин х стекол розглядається з урахуванням внеску
 гетерофазних флуктуацій в вільну енергію. Гетерофазними флуктуаціями в рідині є зародки
 некристалічного твердого тіла, а в склі - зародки рідкої фази. Твердотільнии кристалічний стан
 виключено з розгляду. Опис вільної енергії грунтується на застосуванні краплинної моделі і моделі
 змішаного стану. Показано, що на площині (P, T) існують три області стабільності різних
 структурних станів системи, що розглядається. Дві з них - області стабільності краплинних
 структурних станів, в яких гетерофазні флуктуації мають форму ізольованих крапель. В третій
 області стабільним є змішаний стан, в ньому співіснують два нескінченних взаємно протікаючих
 кластери, рідкий і некристалічнии твердотільнии. Ширина температурного інтервалу, [Tt1, Tt2], в
 якому змішаний стан є стабільним, збільшується з ростом конфігураційної ентропії (складності)
 некристалічної твердотільної фракції. В межах застосованого підходу знайдено слабкі фазові
 переходи першого роду при Т = Tt1 і при Т = Тt2. Показано, що в змішаному стані можливі фазові
 переходи першого або другого роду. Знайдено критерії наявності цих фазових переходів. Одержано
 рівняння стану і вирази для термодинамічних величин (ентропії, теплоємності, стисливості і
 коефіцієнта теплового розширення) для краплинних і змішаного станів. Theomodynamics of glass-forming liquids and
 glasses is considered taking into account the contributions of heterophase fluctuations to tree energy.
 The heterophase fluctuations in liquids are nuclei of
 non-crystalline solids. In glass the heterophase fluctuations are nuclei of liquid. The crystalline solid
 state is not considered. The droplet approach and
 the mixed state model are applied to describe free
 energy. It is shown that there exist three regions of
 stability of different structure states of the system in
 the plane (P, T). Two of them are the stability regions of the droplet structure states. In the third one
 the mixed state is stable. In the droplet states the
 heterophase fluctuations exist as isolated droplets.
 In the mixed state two infinite percolating clusters
 (solid and liquid) are coexisting. The widths of the
 temperature interval, [Tt1, Tt2], where the mixed
 state is stable increase with the growth of the configurational entropy (complexity) of the non-crystalline solid fraction. In the frame of the approach used
 weak 1st order phase transitions are revealed at
 Т = Tt1 and Т = Тt2. It is shown that in the mixed
 state the 1st order or 2nd order phase transitions are
 possible. The criteria of these phase, transitions are
 obtained. Equations of state and expressions of thermodynamic quantities (entropy, specific heat capacity, compressibility and thermal expansion coefficient) in the droplet and mixed states are derived. ru Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Низкоразмерные и неупорядоченные системы О теpмодинамике пеpеохлажденных жидкостей и стекол On thermodynamics of supercooled liquids and glasses Article published earlier |
| spellingShingle | О теpмодинамике пеpеохлажденных жидкостей и стекол Бакай, А.С. Низкоразмерные и неупорядоченные системы |
| title | О теpмодинамике пеpеохлажденных жидкостей и стекол |
| title_alt | On thermodynamics of supercooled liquids and glasses |
| title_full | О теpмодинамике пеpеохлажденных жидкостей и стекол |
| title_fullStr | О теpмодинамике пеpеохлажденных жидкостей и стекол |
| title_full_unstemmed | О теpмодинамике пеpеохлажденных жидкостей и стекол |
| title_short | О теpмодинамике пеpеохлажденных жидкостей и стекол |
| title_sort | о теpмодинамике пеpеохлажденных жидкостей и стекол |
| topic | Низкоразмерные и неупорядоченные системы |
| topic_facet | Низкоразмерные и неупорядоченные системы |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/176357 |
| work_keys_str_mv | AT bakaias otepmodinamikepepeohlaždennyhžidkosteiistekol AT bakaias onthermodynamicsofsupercooledliquidsandglasses |