Thermal expansion and phase transitions in K1 − x Rb x BSi2O6 leucite borosilicate solid solutions.
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| Title: | Thermal expansion and phase transitions in K |
|---|---|
| Authors: | M. Georgievskaya1, R. Bubnova1, S. Filatov2, V. Ugolkov1 |
| Source: | Glass Physics & Chemistry. Aug2008, Vol. 34 Issue 4, p436-442. 7p. |
| Subjects: | Solid solutions, Crystallization, Solidification, Diffusion |
| Abstract: | Abstract Continuous solid solutions and the reversible phase transition from the I-43d cubic phase to the Ia-3d cubic phase are revealed in the borosilicate series K1 − x Rb x BSi2O6. Samples in the KBSi2O6-RbBSi2O6 system are prepared by solid-phase synthesis and crystallization of glasses and investigated using the annealing and quenching technique, high-temperature X-ray diffraction, and dilatometry. The above polymorphic phase transition is observed in all solid solutions at temperatures in the range from 330 to 430°C depending on the composition: an increase in the rubidium content in the solid solution leads to a gradual decrease in the phase transition temperature. The linear thermal expansion coefficients α are determined for solid solutions of different crystalline modifications and glasses. The linear thermal expansion coefficients α for the I-43d low-temperature phase are equal to (20–23) × 10−6 K−1 according to the X-ray diffraction data and (21–24) × 10−6 K−1 according to the dilatometric data. The values of α for the Ia-3d high-temperature phase lie in the range (4–9) × 10−6 K−1 according to the X-ray diffraction data and in the range (6–9) × 10−6 K−1 according to the dilatometric data. The linear thermal expansion coefficients for both modifications decrease with an increase in the rubidium content in the solid solutions. The linear thermal expansion coefficients for glasses α = (10–11) × 10−6 K−1 are close to those for the high-temperature modification and virtually independent of the sample composition. The I-43d (cubic) ai I41/a (tetragonal) o Ia-3d (cubic) polymorphic phase transitions in the KBSi2O6 compound are revealed by differential scanning calorimetry (DSC) and dilatometry. Their reversibility is confirmed by the DSC data. [ABSTRACT FROM AUTHOR] |
| Copyright of Glass Physics & Chemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Items | – Name: Title Label: Title Group: Ti Data: Thermal expansion and phase transitions in K<subscript>1 − x </subscript>Rb<subscript> x </subscript>BSi<subscript>2</subscript>O<subscript>6</subscript> leucite borosilicate solid solutions. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22M%2E+Georgievskaya%22">M. Georgievskaya</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22R%2E+Bubnova%22">R. Bubnova</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22S%2E+Filatov%22">S. Filatov</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22V%2E+Ugolkov%22">V. Ugolkov</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Glass+Physics+%26+Chemistry%22">Glass Physics & Chemistry</searchLink>. Aug2008, Vol. 34 Issue 4, p436-442. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Solid+solutions%22">Solid solutions</searchLink><br /><searchLink fieldCode="DE" term="%22Crystallization%22">Crystallization</searchLink><br /><searchLink fieldCode="DE" term="%22Solidification%22">Solidification</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion%22">Diffusion</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract  Continuous solid solutions and the reversible phase transition from the I-43d cubic phase to the Ia-3d cubic phase are revealed in the borosilicate series K1 − x Rb x BSi2O6. Samples in the KBSi2O6-RbBSi2O6 system are prepared by solid-phase synthesis and crystallization of glasses and investigated using the annealing and quenching technique, high-temperature X-ray diffraction, and dilatometry. The above polymorphic phase transition is observed in all solid solutions at temperatures in the range from 330 to 430°C depending on the composition: an increase in the rubidium content in the solid solution leads to a gradual decrease in the phase transition temperature. The linear thermal expansion coefficients α are determined for solid solutions of different crystalline modifications and glasses. The linear thermal expansion coefficients α for the I-43d low-temperature phase are equal to (20–23) × 10−6 K−1 according to the X-ray diffraction data and (21–24) × 10−6 K−1 according to the dilatometric data. The values of α for the Ia-3d high-temperature phase lie in the range (4–9) × 10−6 K−1 according to the X-ray diffraction data and in the range (6–9) × 10−6 K−1 according to the dilatometric data. The linear thermal expansion coefficients for both modifications decrease with an increase in the rubidium content in the solid solutions. The linear thermal expansion coefficients for glasses α = (10–11) × 10−6 K−1 are close to those for the high-temperature modification and virtually independent of the sample composition. The I-43d (cubic) ai I41/a (tetragonal) o Ia-3d (cubic) polymorphic phase transitions in the KBSi2O6 compound are revealed by differential scanning calorimetry (DSC) and dilatometry. Their reversibility is confirmed by the DSC data. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Glass Physics & Chemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S108765960804010X Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 436 Subjects: – SubjectFull: Solid solutions Type: general – SubjectFull: Crystallization Type: general – SubjectFull: Solidification Type: general – SubjectFull: Diffusion Type: general Titles: – TitleFull: Thermal expansion and phase transitions in K1 − x Rb x BSi2O6 leucite borosilicate solid solutions. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: M. Georgievskaya – PersonEntity: Name: NameFull: R. Bubnova – PersonEntity: Name: NameFull: S. Filatov – PersonEntity: Name: NameFull: V. Ugolkov IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2008 Type: published Y: 2008 Identifiers: – Type: issn-print Value: 10876596 Numbering: – Type: volume Value: 34 – Type: issue Value: 4 Titles: – TitleFull: Glass Physics & Chemistry Type: main |
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