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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2605.27455 |
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| _version_ | 1866917536843431936 |
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| author | Yuryev, Vladimir A. Kuznetsov, Sergey V. Alexandrov, Alexander A. Yuryeva, Tatyana V. |
| author_facet | Yuryev, Vladimir A. Kuznetsov, Sergey V. Alexandrov, Alexander A. Yuryeva, Tatyana V. |
| contents | CaCuSi$_4$O$_{10}$ powder was studied by differential scanning calorimetry and thermogravimetry methods in the range from room temperature to 1450$\,^{\circ}$C at heating and cooling rates of 20$\,^{\circ}$C/min.
The process of decomposition of cuprorivaite, the composition and transformations of its decomposition products during successive heat treatments were also studied by powder X-ray diffraction and polarization optical microscopy techniques.
It was found that CaCuSi$_4$O$_{10}$ starts to decompose by incongruent melting at a temperature of about 1020$\,^{\circ}$C, with the minimum of the endothermic DSC peak associated with this process being at 1064.4$\,^{\circ}$C.
CaCuSi$_4$O$_{10}$ decomposes irreversibly and subsequent cyclic annealings up to a temperature of 1450$\,^{\circ}$C at heating and cooling rates of 20$\,^{\circ}$C/min do not cause its re-synthesis.
CaCuSi$_4$O$_{10}$ transforms into a two-phase system consisting of acicular crystals of monoclinic tridymite fused with green glass with the composition CuO$\,-\,$Cu$_2$O$\,-\,$CaO$\,-\,$SiO$_2$, with the weight ratio of tridymite to glass being about $12:13$, as a result of two successive annealings up to the temperature of 1450$\,^{\circ}$C. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_27455 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | High-temperature instability of artificial cuprorivaite: a study using thermal analysis, X-ray powder diffractometry and polarized light microscopy Yuryev, Vladimir A. Kuznetsov, Sergey V. Alexandrov, Alexander A. Yuryeva, Tatyana V. Materials Science CaCuSi$_4$O$_{10}$ powder was studied by differential scanning calorimetry and thermogravimetry methods in the range from room temperature to 1450$\,^{\circ}$C at heating and cooling rates of 20$\,^{\circ}$C/min. The process of decomposition of cuprorivaite, the composition and transformations of its decomposition products during successive heat treatments were also studied by powder X-ray diffraction and polarization optical microscopy techniques. It was found that CaCuSi$_4$O$_{10}$ starts to decompose by incongruent melting at a temperature of about 1020$\,^{\circ}$C, with the minimum of the endothermic DSC peak associated with this process being at 1064.4$\,^{\circ}$C. CaCuSi$_4$O$_{10}$ decomposes irreversibly and subsequent cyclic annealings up to a temperature of 1450$\,^{\circ}$C at heating and cooling rates of 20$\,^{\circ}$C/min do not cause its re-synthesis. CaCuSi$_4$O$_{10}$ transforms into a two-phase system consisting of acicular crystals of monoclinic tridymite fused with green glass with the composition CuO$\,-\,$Cu$_2$O$\,-\,$CaO$\,-\,$SiO$_2$, with the weight ratio of tridymite to glass being about $12:13$, as a result of two successive annealings up to the temperature of 1450$\,^{\circ}$C. |
| title | High-temperature instability of artificial cuprorivaite: a study using thermal analysis, X-ray powder diffractometry and polarized light microscopy |
| topic | Materials Science |
| url | https://arxiv.org/abs/2605.27455 |