Preparation and properties of zirconium tungstate with anomalous thermal characteristics
The main aim of the study: The actuality of the discussed issue is caused by the lack of systematic studies of structural phase transformations of zirconium tungstate at temperature increase. The methods used in the study:High temperature in situ X-ray analysis, refinement of the structure by the Ri...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2019-05-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya-tpu.ru/archive/article/view/1324 |
| Summary: | The main aim of the study: The actuality of the discussed issue is caused by the lack of systematic studies of structural phase transformations of zirconium tungstate at temperature increase. The methods used in the study:High temperature in situ X-ray analysis, refinement of the structure by the Rietveld method using TOPAS v.4.2 (Bruker) software, thermogravimetric differential scanning calorimetry. The results: The morphology of the material was represented as rod-shaped particles having a block structure. The ZrW2O8 synthesized was kinetically stable from 25 to 540 °C. Temperature increase has initiated structural change which resulted decomposition of ZrW2O8 into ZrO2 and WO3. The ZrW2O8 synthesized demonstrated a negative thermal expansion behavior from 25 to 750 °C. |
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| ISSN: | 2500-1019 2413-1830 |