Influence of complex activators of sintering on creating radiotransparent ceramics in SrO–Al2O3–SiO2
| Autor: | Ruslan Kryvobok, Georgij Lisachuk, Vitaliy Tsovma, Artem Zakharov, Olena Lapuzina |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
020209 energy 0211 other engineering and technologies Energy Engineering and Power Technology chemistry.chemical_element Sintering Mineralogy 02 engineering and technology Dielectric engineering.material Anorthite Industrial and Manufacturing Engineering Management of Technology and Innovation 021105 building & construction 0202 electrical engineering electronic engineering information engineering Ceramic Electrical and Electronic Engineering Eutectic system Strontium Applied Mathematics Mechanical Engineering Computer Science Applications chemistry Chemical engineering Control and Systems Engineering visual_art engineering visual_art.visual_art_medium Lithium Dielectric loss |
| Zdroj: | Eastern-European Journal of Enterprise Technologies. 1:10-15 |
| ISSN: | 1729-4061 1729-3774 |
| DOI: | 10.15587/1729-4061.2017.91110 |
| Popis: | The study has solved the problem of obtaining densely sintered ceramics at a low firing temperature on the basis of the system SrO–Al 2 O 3 –SiO 2 . This was made possible after researching the influence of complex activators of sintering, selected among fluorides of alkali metals, and an oxide combination of stannum and lithium on the process of synthesizing strontium anorthite ceramics. The tests have proved that it is technologically advisable to use the complex sintering activators LiF–NaF and SnO 2 –Li 2 O due to their low-temperature eutectics and beneficial effects on the structure and properties of strontium ceramics. The experiments were used to study the impact of the complex sintering activators of a fluxing action in the amounts of 1–3 wt. %, with eutectic ratios of the components, on the low-temperature synthesis of strontium anorthite. The tests have confirmed the possibility of activating the reaction that produces the intermediate phase of silicate strontium, which reduces the temperature of firing strontium anorthite ceramics. The resulting ceramic material, based on a crystalline phase, is strontium anorthite, which was obtained at a synthesis temperature of 1,250 °C after adding 2 wt. % of Li 2 CO 3 +SnO 2 to the composition “0” with the following properties: water absorption – 5.52 %, apparent density – 2.88 g/cm 3 , the dielectric constant – 9.7, and the dielectric loss tangent – 0.06. |
| Databáze: | OpenAIRE |
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