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Crystallization of Glasses Containing $K_{2}$O, PbO, BaO, $Al_{2}O_{3}$, $B_{2}O_{3}$, and $TiO_{2}$
| Content Provider | MDPI |
|---|---|
| Author | Patricia, Ponce-Peña Mar, ía Azucena González-Lozano Diola, Marina Núñez-Ramírez Alicia, Rodríguez-Pulido Belkis, Sulbarán-Rangel Escobedo-Bretado, Miguel Ángel Jurado, Zoe V. Quiñones Poisot, Martha |
| Copyright Year | 2022 |
| Description | The objective of this work was to obtain glass-ceramics from stable glasses, with a composition of barium, lead, and potassium titanate phases, for use as semiconductors. For this purpose, the glass-ceramic technique was used to control crystal growth and obtain a fine-grained microstructure. Various glasses containing $K_{2}$O, PbO, BaO, $Al_{2}O_{3}$, $B_{2}O_{3}$, and $TiO_{2}$ were prepared using a melt-quenching method. X-ray diffraction (XRD) and scanning electron microscopy (SEM) showed a single amorphous phase of all samples. Infrared spectra confirmed the presence of B-O bonds stretching vibrations of (B_{3}O_{6}$)^{3−}$ boroxol rings and $BO_{3}$ triangles, as well as Ti-O stretching vibrations of $(TiO_{6/2}$) and $(AlO_{6/2}$) octahedral units. Thermal analyses confirmed the presence of one or more crystallization peaks in the range of 700 to 744 °C. On this base, they were heat-treated to promote crystal growth. XRD and SEM detected $Ba_{4}Ti_{12}O_{27}$, $Ti_{7}O_{13,}$ and $BaTiO_{3}$ phases, homogeneously distributed throughout the material with fine crystallite size. In addition, crystallized glasses’ (glass-ceramics) properties were determined; the density values were 2.8–3.55 $g/cm^{3}$; the chemical resistance to acidic and basic media was low; and the band-gap values were in the range of 2.88 to 3.05 eV. These results suggest that crystallized glasses may have application in photocatalysis. |
| Starting Page | 574 |
| e-ISSN | 20734352 |
| DOI | 10.3390/cryst12050574 |
| Journal | Crystals |
| Issue Number | 5 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-04-20 |
| Access Restriction | Open |
| Subject Keyword | Crystals Ceramics Titanate Glasses Glass-ceramics Band-gap Photocatalytic Properties |
| Content Type | Text |
| Resource Type | Article |
