We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Synthesis of BiTiO by high energy milling of BiO-TiO (anatase) mixtures.
- Authors
Berbenni, V.; Milanese, C.; Bruni, G.; Girella, A.; Marini, A.
- Abstract
The mechanism of BiTiO formation starting from the two constituent oxides has been studied. Starting from a physical mixture, a solid-state reaction occurs between the two oxides that leads at ≈700 °C to a mixture of the two ternary oxides BiTiO + BiTiO along with unreacted precursor oxides. At T ≈ 830 °C BiTiO reacts with TiO forming BiTiO and, finally, at T ≈ 850 °C, the residual BiTiO undergoes the peritectic reaction that produces BiTiO plus a liquid phase. However, the formation of BiTiO is not complete at temperatures as high as 900 °C. Starting from a mechanically activated mixture, the intermediate BiTiO only forms as a minority phase at a lower temperature ( T ≈ 550 °C), and then it rapidly reacts to give BiTiO. No trace of the peritectic reaction is found in the case of the activated mixture. The complete formation of BiTiO can be obtained by 3-h annealing of the activated mixture at T ≥ 650 °C. The heat capacity of the product phase BiTiO has also been measured in the temperature range 50-300 °C.
- Subjects
BISMUTH titanate; TITANIUM dioxide; MIXTURES; CHEMICAL synthesis; MILLING (Metalwork); SOLID state chemistry
- Publication
Journal of Thermal Analysis & Calorimetry, 2016, Vol 126, Issue 3, p1507
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-016-5807-x