Phase relations in the Tl2 Te–TlBiТe2 –TlTbTe2 system
The phase equilibria in the Tl2Te–TlBiТe2–TlTbTe2 concentration area of the Tl–Bi–Tb-Te quaternary system were investigated by using the differential thermal analysis and powder X-ray diffraction techniques. The diagram of the solid-phase equilibria of this system at room temperature was construct...
| Asıl Yazarlar: | , , , , , |
|---|---|
| Materyal Türü: | Makale |
| Dil: | English |
| Baskı/Yayın Bilgisi: |
Voronezh State University
2021-03-01
|
| Seri Bilgileri: | Конденсированные среды и межфазные границы |
| Konular: | |
| Online Erişim: | https://journals.vsu.ru/kcmf/article/view/3296 |
| _version_ | 1828909464212733952 |
|---|---|
| author | Samira Z. Imamaliyeva Ganira I Alakbarzade Dunya M. Babanly Marina V. Bulanova Vagif A. Gasymov Mahammad B. Babanly |
| author_facet | Samira Z. Imamaliyeva Ganira I Alakbarzade Dunya M. Babanly Marina V. Bulanova Vagif A. Gasymov Mahammad B. Babanly |
| author_sort | Samira Z. Imamaliyeva |
| collection | DOAJ |
| description | The phase equilibria in the Tl2Te–TlBiТe2–TlTbTe2 concentration area of the Tl–Bi–Tb-Te quaternary system were investigated by using the differential thermal analysis and powder X-ray diffraction techniques. The diagram of the solid-phase equilibria of this system at room temperature was constructed. It was established that the Tl9BiTe6–Tl9TbTe6 section divides the Tl2Te–TlBiТe2–TlTbTe2 system into two independent subsystems. It was found that the Tl2Te–Tl9BiTe6–Tl9TbTe6 subsystem
is characterized by the formation of a wide field of solid solutions with a Tl5Te3
structure (d-phase) that occupy more than 90% of the area of the concentration triangle. The results of X-ray phase analysis of alloys of the Tl9BiTe6–Tl9TbTe6–TlTbTe2–TlBiТe2 subsystem showed the formation of wide regions of solid solutions based on TlTbTe2and TlBiTe2 along the section of TlTbTe2–TlBiTe2 ((b1- and b2
-phases) and made it possible to determine the location of the heterogeneous phase regions in this subsystem. The parameters of crystal lattices of mutually saturated compositions of the b1-, b2-, and d-phases are calculated from powder diffraction patterns. The paper also presents some polythermal sections, isothermal sections at 740 and 780 K of the phase diagram, as well as projections of the liquidus and solidus surfaces of the Tl2Te–Tl9BiТe6–Tl9TbTe6 subsystem. The liquidus surface consists of three fields of the primary crystallization of a (Tl2Te)-, d- and b1 -phase. The constructed isothermal sections clearly demonstrate that the directions of the tie lines do not coincide with the T–x planes of the studied internal sections, which is characteristic of non-quasi-binary polythermal sections. The obtained new phases are of interest as potential thermoelectric and magnetic materials. |
| first_indexed | 2024-12-13T18:28:25Z |
| format | Article |
| id | doaj.art-6bc9f536ff6d4b42b83c2741f85a9a3c |
| institution | Directory Open Access Journal |
| issn | 1606-867X 1606-867X |
| language | English |
| last_indexed | 2024-12-13T18:28:25Z |
| publishDate | 2021-03-01 |
| publisher | Voronezh State University |
| record_format | Article |
| series | Конденсированные среды и межфазные границы |
| spelling | doaj.art-6bc9f536ff6d4b42b83c2741f85a9a3c2022-12-21T23:35:33ZengVoronezh State UniversityКонденсированные среды и межфазные границы1606-867X1606-867X2021-03-01231324010.17308/kcmf.2021.23/3296Phase relations in the Tl2 Te–TlBiТe2 –TlTbTe2 systemSamira Z. Imamaliyeva0https://orcid.org/0000-0001-8193-2122Ganira I Alakbarzade1https://orcid.org/0000-0001-8500-0007Dunya M. Babanly2https://orcid.org/0000-0002-8330-7854Marina V. Bulanova3https://orcid.org/0000-0002-8691-0982Vagif A. Gasymov4https://orcid.org/0000-0001-6233-5840Mahammad B. Babanly5https://orcid.org/0000-0001-5962-3710Institute of Catalysis and Inorganic Chemistry of the Azerbaijan National Academy of Sciences, 113 H. Javid ave., Baku AZ-1143, Azerbaijan PhD in Chemistry, Assistance Professor, Institute of Catalysis and Inorganic Chemistry, Azerbaijan National Academy of Sciences, Baku, Azerbaijan; e-mail: samira9597a@gmail.comAzerbaijan National Aerospace Agency, 159 Azadlig ave, AZ-1106, Baku, Azerbaijan PhD student, Azerbaijan National Aerospace Agency, Baku, Azerbaijan; e-mail: alakbarzadegi@gmail.com Institute of Catalysis and Inorganic Chemistry of the Azerbaijan National Academy of Sciences, 113 H. Javid ave., Baku AZ-1143, Azerbaijan; Azerbaijan State Oil and Industry University, French-Azerbaijani University (UFAZ), 16/21 Azadlıq prospekti, Baku AZ-1101, Azerbaijan y, DSc in Chemistry, Assistance Professor, Institute of Catalysis and Inorganic Chemistry, Azerbaijan National Academy of Sciences, Azerbaijan State Oil and Industry University, Baku, Azerbaijan; e-mail: dunya.babanly@ufaz.az.Frantsevich Institute for Problems of Materials Science, NASU, 3 Krzhizhanovsky st., Kiev 03142, Ukraine DSc in Chemistry, Leading Researcher, I. M. Frantsevich Institute for Problems of Materials Science, NAS of Ukraine, Kiev, Ukraine; e-mail: mvbulanova2@gmail.com Institute of Catalysis and Inorganic Chemistry of the Azerbaijan National Academy of Sciences, 113 H. Javid ave., Baku AZ-1143, Azerbaijan PhD in Chemistry, Assistance Professor, Institute of Catalysis and Inorganic Chemistry, Azerbaijan National Academy of Sciences, Baku, Azerbaijan; e-mail: v-gasymov@rambler.ru.Institute of Catalysis and Inorganic Chemistry of the Azerbaijan National Academy of Sciences, 113 H. Javid ave., Baku AZ-1143, Azerbaijan DSc in Chemistry, Professor, Associate Member of the Azerbaijan National Academy of Sciences, Deputy-director of the Institute of Catalysis and Inorganic Chemistry, Azerbaijan National Academy of Sciences, Baku State University, Baku, Azerbaijan; e-mail: babanlymb@gmail.com.The phase equilibria in the Tl2Te–TlBiТe2–TlTbTe2 concentration area of the Tl–Bi–Tb-Te quaternary system were investigated by using the differential thermal analysis and powder X-ray diffraction techniques. The diagram of the solid-phase equilibria of this system at room temperature was constructed. It was established that the Tl9BiTe6–Tl9TbTe6 section divides the Tl2Te–TlBiТe2–TlTbTe2 system into two independent subsystems. It was found that the Tl2Te–Tl9BiTe6–Tl9TbTe6 subsystem is characterized by the formation of a wide field of solid solutions with a Tl5Te3 structure (d-phase) that occupy more than 90% of the area of the concentration triangle. The results of X-ray phase analysis of alloys of the Tl9BiTe6–Tl9TbTe6–TlTbTe2–TlBiТe2 subsystem showed the formation of wide regions of solid solutions based on TlTbTe2and TlBiTe2 along the section of TlTbTe2–TlBiTe2 ((b1- and b2 -phases) and made it possible to determine the location of the heterogeneous phase regions in this subsystem. The parameters of crystal lattices of mutually saturated compositions of the b1-, b2-, and d-phases are calculated from powder diffraction patterns. The paper also presents some polythermal sections, isothermal sections at 740 and 780 K of the phase diagram, as well as projections of the liquidus and solidus surfaces of the Tl2Te–Tl9BiТe6–Tl9TbTe6 subsystem. The liquidus surface consists of three fields of the primary crystallization of a (Tl2Te)-, d- and b1 -phase. The constructed isothermal sections clearly demonstrate that the directions of the tie lines do not coincide with the T–x planes of the studied internal sections, which is characteristic of non-quasi-binary polythermal sections. The obtained new phases are of interest as potential thermoelectric and magnetic materials.https://journals.vsu.ru/kcmf/article/view/3296tl2 te–tlbiтe2 –tltbte2 systemphase equilibriasolid solutionspowder x-ray diffractioncrystal latticetopological insulators |
| spellingShingle | Samira Z. Imamaliyeva Ganira I Alakbarzade Dunya M. Babanly Marina V. Bulanova Vagif A. Gasymov Mahammad B. Babanly Phase relations in the Tl2 Te–TlBiТe2 –TlTbTe2 system Конденсированные среды и межфазные границы tl2 te–tlbiтe2 –tltbte2 system phase equilibria solid solutions powder x-ray diffraction crystal lattice topological insulators |
| title | Phase relations in the Tl2 Te–TlBiТe2 –TlTbTe2 system |
| title_full | Phase relations in the Tl2 Te–TlBiТe2 –TlTbTe2 system |
| title_fullStr | Phase relations in the Tl2 Te–TlBiТe2 –TlTbTe2 system |
| title_full_unstemmed | Phase relations in the Tl2 Te–TlBiТe2 –TlTbTe2 system |
| title_short | Phase relations in the Tl2 Te–TlBiТe2 –TlTbTe2 system |
| title_sort | phase relations in the tl2 te tlbiтe2 tltbte2 system |
| topic | tl2 te–tlbiтe2 –tltbte2 system phase equilibria solid solutions powder x-ray diffraction crystal lattice topological insulators |
| url | https://journals.vsu.ru/kcmf/article/view/3296 |
| work_keys_str_mv | AT samirazimamaliyeva phaserelationsinthetl2tetlbite2tltbte2system AT ganiraialakbarzade phaserelationsinthetl2tetlbite2tltbte2system AT dunyambabanly phaserelationsinthetl2tetlbite2tltbte2system AT marinavbulanova phaserelationsinthetl2tetlbite2tltbte2system AT vagifagasymov phaserelationsinthetl2tetlbite2tltbte2system AT mahammadbbabanly phaserelationsinthetl2tetlbite2tltbte2system |