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Effect of Cu2+ ion incorporation on the phase development of ZrO2-type solid solutions during the thermal treatments


Štefanić, Goran; Musić, Svetozar; Ivanda, Mile
Effect of Cu2+ ion incorporation on the phase development of ZrO2-type solid solutions during the thermal treatments // Journal of alloys and compounds, 491 (2010), 1-2; 536-544 doi:10.1016/j.jallcom.2009.10.263 (međunarodna recenzija, članak, znanstveni)


Naslov
Effect of Cu2+ ion incorporation on the phase development of ZrO2-type solid solutions during the thermal treatments

Autori
Štefanić, Goran ; Musić, Svetozar ; Ivanda, Mile

Izvornik
Journal of alloys and compounds (0925-8388) 491 (2010), 1-2; 536-544

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Nanostructures ; Precipitation ; Phase transitions ; X-ray diffraction ; Thermal analysis ; Scanning electron microscopy

Sažetak
The amorphous precursors of the ZrO2–CuO system at the ZrO2-rich side of the concentration range were prepared by co-precipitation from aqueous solutions of the corresponding salts. Thermal behavior of the amorphous precursors was monitored using X-ray powder diffraction, Raman spectroscopy, field emission scanning electron microscopy, energy dispersive X-ray spectrometry, differential scanning calorimetry and thermogravimetric analysis. The crystallization temperature of the amorphous precursors rose with an increase in the CuO content for not, vert, similar180 °C. Maximum solubility of Cu2+ ions in the ZrO2 lattice (not, vert, similar23 mol%) occurs in the metastable products obtained upon crystallization of the amorphous precursors. The results of Raman spectroscopy indicate that the incorporation of Cu2+ ions stabilize the tetragonal ZrO2 polymorph. A precise determination of lattice parameters, using both Rietveld and Le Bail refinements of the powder diffraction patterns, showed that the axial ratio c/a in the ZrO2-type solid solutions with a Cu2+ content ≥20 mol% approach 1 (formation of t″-form of tetragonal phase). The terminal solid solubility limit of Cu2+ ions in the ZrO2 lattice rapidly drops with an increase in treatment temperature (up to 1000 °C) that is followed by the formation of and increase in phases structurally closely related to tenorite and monoclinic ZrO2. Low thermal stability of the t-ZrO2-type phase was attributed to the reduction of the sintering temperature in the presence of CuO and a significant difference in size and shape of zirconia and tenorite particles, which prevent surface interactions.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija



POVEZANOST RADA


Projekt / tema
098-0982904-2898 - Fizika i primjena nanostruktura i volumne tvari (Mile Ivanda, )
098-0982904-2952 - Sinteza i mikrostruktura metalnih oksida i oksidnih stakala (Mira Ristić, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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