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Thermal properties of ceramic Bi2VO5.5 and strontium–borate glass-ceramics containing crystalites of Bi2VO5.5. measured with DSC
Opis
Thermal properties of ceramic Bi2VO5.5 and strontium–borate glass-ceramics containing Bi2VO5.5 crystallites was measured by DSC.
In order to prepare glass-ceramics composites two compounds: Bi2VO5.5 and SrB4O7 were synthesized via a solid state reaction route. The Bi2VO5.5 was synthesized from the stoichiometric mixture of initial powders of Bi2O3 and V2O5 which were ball-milled in pure acetone for 6 h at room temperature. The milling was performed in steps of 1 h with rest intervals of 10min. The mixture was heated up to 1020K in air and kept at this temperature for 24 h. The heating and cooling rate was of 50K h-1. The SrB4O7 was synthesized from the stoichiometric mixture of analytical grade SrCO3 and H3BO3 which were mashed in a mortar. Next the mixture was heated up to 1073K and kept at this temperature for 12 h.
Samples of a composition of xBi2VO5.5–(100x)SrB4O7, where = 57.5 and 62.2 (in mol%) were prepared by the conventional melt quenching technique. Additionally, sample of a composition of 70(2Bi2O3-V2O5)-30SrB4O7 (in %mol) were prepared from reagent-grade Bi2O3, V2O5 and preprepared SrB4O7. Samples of glass were prepared by the conventional melt quenching technique. The melting was conducted in alumina crucibles at 1373 K for 2 hours. The melt was poured onto a preheated (573 K) brass plate and pressed by another plate to obtain flat circular disks of 1–2 mm thickness and 20–30 mm in diameter. In the following, sample symbols were simplified to BiV and xBiV(100x)SBO.
Differential scanning calorimetry (DSC) measurements were performed on powdered samples in a flow of nitrogen at 50 cm3 min−1 using a Netzsch STA 449F1 thermal analyzer. The heating rate was maintained at 15 K min−1 within a temperature range of 373–813 K.
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hexmd5(md5(part1)+md5(part2)+...)-{parts_count} gdzie pojedyncza część pliku jest wielkości 512 MBPrzykładowy skrypt do wyliczenia:
https://github.com/antespi/s3md5
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Informacje szczegółowe
- Rok publikacji:
- 2015
- Data zatwierdzenia:
- 2021-06-21
- Język danych badawczych:
- angielski
- Dyscypliny:
-
- inżynieria materiałowa (Dziedzina nauk inżynieryjno-technicznych)
- DOI:
- Identyfikator DOI 10.34808/05cg-9v29 otwiera się w nowej karcie
- Weryfikacja:
- Politechnika Gdańska
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