prikaz prve stranice dokumenta In situ phase analysis of the thermal decomposition products of zirconium salts
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Scientific paper - Original scientific paper
In situ phase analysis of the thermal decomposition products of zirconium salts
Croatica Chemica Acta, 72 (1999), 2-3; 395-412. urn:nbn:hr:217:327313
Štefančić, Goran; Gržeta, Biserka; Popović, Stanko; Musić, Svetozar

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Štefančić, G., Gržeta, B., Popović, S. & Musić, S. (1999). In situ phase analysis of the thermal decomposition products of zirconium salts. Croatica Chemica Acta, 72. (2-3), 395-412. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:327313

Štefančić, Goran, et al. "In situ phase analysis of the thermal decomposition products of zirconium salts." Croatica Chemica Acta, vol. 72, no. 2-3, 1999, pp. 395-412. https://urn.nsk.hr/urn:nbn:hr:217:327313

Štefančić, Goran, Biserka Gržeta, Stanko Popović and Svetozar Musić. "In situ phase analysis of the thermal decomposition products of zirconium salts." Croatica Chemica Acta 72, no. 2-3 (1999): 395-412. https://urn.nsk.hr/urn:nbn:hr:217:327313

Štefančić, G., et al. (1999) 'In situ phase analysis of the thermal decomposition products of zirconium salts', Croatica Chemica Acta, 72(2-3), pp. 395-412. Available at: https://urn.nsk.hr/urn:nbn:hr:217:327313 (Accessed 17 November 2024)

Štefančić G, Gržeta B, Popović S, Musić S. In situ phase analysis of the thermal decomposition products of zirconium salts. Croatica Chemica Acta [Internet]. 1999 [cited 2024 November 17];72(2-3):395-412. Available at: https://urn.nsk.hr/urn:nbn:hr:217:327313

G. Štefančić, B. Gržeta, S. Popović and S. Musić, "In situ phase analysis of the thermal decomposition products of zirconium salts", Croatica Chemica Acta, vol. 72, no. 2-3, pp. 395-412, 1999. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:327313. [Accessed: 17 November 2024]

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Metadata
Title (english)In situ phase analysis of the thermal decomposition products of zirconium salts
AuthorGoran Štefančić
AuthorBiserka Gržeta
AuthorStanko Popović
AuthorSvetozar Musić
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
X-ray powder diffraction at high temperature was used to determine the phase composition of the thermal decomposition products of two zirconium salts, Zr(SO4)2 ⋅ 4 H2O and ZrO(N03)2 ⋅ 2 H2O, and of a mixture of zirconium nitrates having Zr(OH)2(NO3)2 ⋅ 4.7 H2O and ZrO(NO3)2 ⋅ 2 H2O as dominant components. Heating of the samples up to 1200 °C was performed inside a high-temperature chamber, attached to a diffractometer, at an air pressure of ≈ 2 × 10-3 Pa. Regardless of the structural differences in the start-ing salts, thermal decomposition products crystallized to t-ZrO2, which remained stable up to 1200 °C. This result indicated that the structural nature of the starting materials was not the most important factor of metastable t-ZrO2 formation. The thermodynamically stable m-ZrO2 appeared after the cooling of the samples to room temperature. If the cooling was performed at low air pressure, the m-ZrO2 content was small. Introduction of air, even at RT, caused a considerable increase of m-ZrO2, which became the dominant phase in ali cases. The important role of oxygen in the t-ZrO2 → m-ZrO2 transition indicates that the lack of oxygen in the zirconia lattice favours the formation of metastable t-ZrO2.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleCroatica Chemica Acta
Numberingvol. 72, no. 2-3, pp. 395-412
p-ISSN0011-1643
e-ISSN1334-417X
URN:NBNurn:nbn:hr:217:327313
Publication1999
Document URLhttps://hrcak.srce.hr/132180
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2019-10-10 09:21:08