title: Study by Mössbauer spectroscopy of iron oxides in ceramic brick on the basis of inter-shale clay and brown coal tailings
metadata.name: dc.contributor.author
metadata.value: Abdrakhimov, Vladimir Z.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Abdrakhimova, Elena S.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2017-07-19T11:02:26Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2017-07-19T11:02:26Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2017-06
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Abdrakhimov V. Z., Abdrakhimova E. S. Study by Mössbauer spectroscopy of iron oxides in ceramic brick on the basis of inter-shale clay and brown coal tailings. Vestnik SPbSU. Physics and Chemistry. 2017, vol. 4 (62), issue 2, pp. 215–223.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: 10.21638/11701/spbu04.2017.207
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/6964
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The distribution of iron ions during firing of ceramic bricks made of inter-shale clay and brown
  coal tailings was achieved by employing the M¨ossbauer effect without the use of traditional natural
  materials. It is revealed that in samples containing high amounts of iron oxide (8%) the strength
  and frost resistance is higher compared to the samples containing Fe2O3 is < 6%. Calculation of
  areas of doublets spectrum showed that ferrous compounds on the surface (under a predominantly
  oxidizing environment) of the studied samples are mostly represented by hematite, and in the
  center (recovery environment) — magnetite. Studies have shown that in the inner parts of the
  ceramic samples, the opposite processes occur — there is a tendency to decrease the content
  of hematite and increase in the amount of magnetite by reduction of iron oxides with oxides of
  carbon. The recovery of Fe2+ and the early formation of the liquid phase promotes the progress of
  the reaction of formation of mullite. Among these reactions is the formation of spinel (hercynite
  and mullite). Hematite and magnetite contribute to the emergence of solid solutions and the
  formation of molten phases in the early stages of firing, which initiates the formation of mullite. With the emergence of solid solutions by partial substitution: Fe3+, Al3+ mullite is formed with
  a different chemical composition, which contributes to strengthening the structure of the ceramic
  material. Refs 25. Figs 2. Tables 4.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Physics and Chemistry;Volume 4 (62); Issue 2
metadata.lang: -
metadata.name: dc.subject
metadata.value: method of M¨ossbauer spectroscopy
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: iron oxides
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: inter-shale clay
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: waste coal
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: isomorphic substitution
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: mullite
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Study by Mössbauer spectroscopy of iron oxides in ceramic brick on the basis of inter-shale clay and brown coal tailings
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 07-Abdrakhimov.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/6964/1/07-Abdrakhimov.pdf
resources.format: Adobe PDF
resources.size: 463,84 kB