Role of MnO in manganese–borate binary glass systems: a study on structure and thermal properties
| Autor: | Tomasz Lewandowski, Marta Prześniak-Welenc, Marcin Łapiński, L. Wicikowski, Michalina Walas |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Photoluminescence Analytical chemistry chemistry.chemical_element 02 engineering and technology Manganese 021001 nanoscience & nanotechnology 01 natural sciences Differential scanning calorimetry chemistry X-ray photoelectron spectroscopy Mechanics of Materials 0103 physical sciences Content (measure theory) General Materials Science Thermal stability Fourier transform infrared spectroscopy 0210 nano-technology Boron |
| Zdroj: | Bulletin of Materials Science. 40:933-938 |
| ISSN: | 0973-7669 0250-4707 |
| DOI: | 10.1007/s12034-017-1455-4 |
| Popis: | Structural and thermal properties of $$x\hbox {MnO}-(100-x)\hbox {B}_{2}\hbox {O}_{3}$$ (where $$x=40$$ , 50 and 60 mol%) glass samples have been investigated with the employment of various techniques. Fourier transform infrared spectroscopy results revealed the influence of MnO on glass matrix. Decrease of B–O bond-related band intensities has been observed. MnO addition was found to introduce broken [ $$\hbox {BO}_{2}\hbox {O}^{-}$$ ] $$_{{n}}$$ chains. Differential scanning calorimetry (DSC) measurements presented decreasing $$T_{\mathrm{g}}$$ that indicates depolymerization of glass matrix in the considered compositional range. Moreover, thermal stability (TS) parameter has been evaluated using the DSC technique. It slightly decreased with MnO content. X-ray photoelectron spectroscopy results provided the evidence for $$\hbox {Mn}^{2+}$$ and $$\hbox {Mn}^{3+}$$ presence. Multiplet splitting, close to that of MnO, has been observed. It has been concluded that most of the manganese ions existed in the divalent state. Photoluminescence study revealed that manganese ions are tetragonally co-ordinated in a glassy matrix. |
| Databáze: | OpenAIRE |
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