Phase composition of Bi2O3 specimens doped with Ti, Zr and Hf
Abstract
Powder mixtures of α-Bi2O3 containing 2, 5 and 10 mole % of TiO2, ZrO2 or HfO2 were homogenized, heated at 820ºC for 24 h and quenched in air. X-ray powder diffraction technique was used to characterize the prepared samples. In all cases metastable Bi2O3 polymorphs, γ-Bi2O3 or β-Bi2O3, are found as single or major phases. Addition of Ti4+ ions stabilizes γ-Bi2O3 polymorph, while either Zr4+ or Hf4+ ions stabilize β-Bi2O3 polymorph. In the samples with 2 and 5 mole % of TiO2 the presence of even two γ-Bi2O3 phases (Bi12TiO20 compound and a very low Ti-doped γ-Bi2O3) was established. Similarly, in the sample with 2 mole % of HfO2 two β-Bi2O3 phases were found. Phase composition of prepared samples, values of unit cell parameters and the appearance of two polymorphs with identical crystal structure but different unit cell parameters are discussed and compared with known data.
Keywords:
bismuth(III) oxide / dopants / powder diffraction / phase composition / unit cell parametersSource:
Journal of the Serbian Chemical Society, 2012, 77, 8, 1091-1096Publisher:
- Belgrade : Serbian Chemical Society
Funding / projects:
- Zero- to Three-Dimensional Nanostructures for Application in Electronics and Renewable Energy Sources: Synthesis, Characterization and Processing (RS-45007)
- Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-45001)
- Magnetic and radionuclide labeled nanostructured materials for medical applications (RS-45015)
DOI: 10.2298/JSC110914215P
ISSN: 0352-5139; 1820-7421 (Online)
WoS: 000308830900011
Scopus: 2-s2.0-84866254104
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Poleti, Dejan AU - Karanović, Ljiljana AU - Zdujić, Miodrag AU - Jovalekić, Čedomir PY - 2012 UR - https://dais.sanu.ac.rs/123456789/270 AB - Powder mixtures of α-Bi2O3 containing 2, 5 and 10 mole % of TiO2, ZrO2 or HfO2 were homogenized, heated at 820ºC for 24 h and quenched in air. X-ray powder diffraction technique was used to characterize the prepared samples. In all cases metastable Bi2O3 polymorphs, γ-Bi2O3 or β-Bi2O3, are found as single or major phases. Addition of Ti4+ ions stabilizes γ-Bi2O3 polymorph, while either Zr4+ or Hf4+ ions stabilize β-Bi2O3 polymorph. In the samples with 2 and 5 mole % of TiO2 the presence of even two γ-Bi2O3 phases (Bi12TiO20 compound and a very low Ti-doped γ-Bi2O3) was established. Similarly, in the sample with 2 mole % of HfO2 two β-Bi2O3 phases were found. Phase composition of prepared samples, values of unit cell parameters and the appearance of two polymorphs with identical crystal structure but different unit cell parameters are discussed and compared with known data. PB - Belgrade : Serbian Chemical Society T2 - Journal of the Serbian Chemical Society T1 - Phase composition of Bi2O3 specimens doped with Ti, Zr and Hf SP - 1091 EP - 1096 VL - 77 IS - 8 DO - 10.2298/JSC110914215P UR - https://hdl.handle.net/21.15107/rcub_dais_270 ER -
@article{ author = "Poleti, Dejan and Karanović, Ljiljana and Zdujić, Miodrag and Jovalekić, Čedomir", year = "2012", abstract = "Powder mixtures of α-Bi2O3 containing 2, 5 and 10 mole % of TiO2, ZrO2 or HfO2 were homogenized, heated at 820ºC for 24 h and quenched in air. X-ray powder diffraction technique was used to characterize the prepared samples. In all cases metastable Bi2O3 polymorphs, γ-Bi2O3 or β-Bi2O3, are found as single or major phases. Addition of Ti4+ ions stabilizes γ-Bi2O3 polymorph, while either Zr4+ or Hf4+ ions stabilize β-Bi2O3 polymorph. In the samples with 2 and 5 mole % of TiO2 the presence of even two γ-Bi2O3 phases (Bi12TiO20 compound and a very low Ti-doped γ-Bi2O3) was established. Similarly, in the sample with 2 mole % of HfO2 two β-Bi2O3 phases were found. Phase composition of prepared samples, values of unit cell parameters and the appearance of two polymorphs with identical crystal structure but different unit cell parameters are discussed and compared with known data.", publisher = "Belgrade : Serbian Chemical Society", journal = "Journal of the Serbian Chemical Society", title = "Phase composition of Bi2O3 specimens doped with Ti, Zr and Hf", pages = "1091-1096", volume = "77", number = "8", doi = "10.2298/JSC110914215P", url = "https://hdl.handle.net/21.15107/rcub_dais_270" }
Poleti, D., Karanović, L., Zdujić, M.,& Jovalekić, Č.. (2012). Phase composition of Bi2O3 specimens doped with Ti, Zr and Hf. in Journal of the Serbian Chemical Society Belgrade : Serbian Chemical Society., 77(8), 1091-1096. https://doi.org/10.2298/JSC110914215P https://hdl.handle.net/21.15107/rcub_dais_270
Poleti D, Karanović L, Zdujić M, Jovalekić Č. Phase composition of Bi2O3 specimens doped with Ti, Zr and Hf. in Journal of the Serbian Chemical Society. 2012;77(8):1091-1096. doi:10.2298/JSC110914215P https://hdl.handle.net/21.15107/rcub_dais_270 .
Poleti, Dejan, Karanović, Ljiljana, Zdujić, Miodrag, Jovalekić, Čedomir, "Phase composition of Bi2O3 specimens doped with Ti, Zr and Hf" in Journal of the Serbian Chemical Society, 77, no. 8 (2012):1091-1096, https://doi.org/10.2298/JSC110914215P ., https://hdl.handle.net/21.15107/rcub_dais_270 .