| Title: | Chemical reactions between $BaTiO_3$ ceramic and fluorine-containing atmosphere |
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| Authors: | ID Makovec, Darko (Author)
ID Ule, Nina (Author)
ID Drofenik, Mihael (Author) |
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| Files: |  Acta_Chimica_Slovenica_2002_Makovec,_Ule,_Drofenik_Chemical_reactions_between_BaTiO~_3_ceramics_and_fluorine-containing_atmosphere.pdf (1,20 MB)
MD5: A8E7ADD9665CB3C10CE66B5F1CF2B86E
 http://acta-arhiv.chem-soc.si/49/49-2-229.pdf
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | ▫$BaTiO_3$▫ ceramics were exposed to fluorine-containing atmosphere prepared by introducing a fluorination agent (▫$CF_3CH_2OH$▫) into a hot alumina-tube furnace. The fluorinated samples were studied using SEM and TEM. The fluorination resulted in the formation of a surface-reaction layer with a complex structure. At the reaction front fluorine reacts with ▫$BaTIO_3$▫ to produce ▫$BaF_2$▫ and ▫$BaTi_2O_5$▫. During the course of the fluorination the ▫$BaTi_2O_5$▫ reacts further to produce ▫$BaF_2$▫ and then subsequently Ba-polytitanates with an increasing content of titanium, and then finally ▫$TiO_2$▫. Fluorine also diffuses along the grain boundaries towards the pellet's interior. The presence of the fluorine stabilises the ▫$BaTi_2O_5$▫ compound and consequently triggers its formation in the ceramic's interior in a reaction between ▫$BaTiO_3$▫ and the intergranular phase ▫$Ba_6Ti_{17}O_{40}$▫. |
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| Keywords: | ceramics, fluorinated ceramic samples, stabilising, electronic ceramics |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Year of publishing: | 2002 |
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| Number of pages: | str. 229-241 |
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| Numbering: | Letn. 49, št. 2 |
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| PID: | 20.500.12556/DKUM-53125  |
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| ISSN: | 1318-0207 |
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| UDC: | 666 |
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| ISSN on article: | 1318-0207 |
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| COBISS.SI-ID: | 7168534 |
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| NUK URN: | URN:SI:UM:DK:QOJJ3LEM |
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| Publication date in DKUM: | 10.07.2015 |
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| Views: | 1260 |
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| Downloads: | 126 |
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| Metadata: |    |
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| Categories: | Misc.
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