Abstract
The effect of CuO additions on the firing temperature of the anatase phase of TiO2 has been investigated using X-ray diffraction, transmission electron microscopy, and dilatometry. It was found that the addition of 2 wt% CuO to TiO2 anatase significantly lowered the sintering temperature to approx. 900°C. The presence of a CuO-rich intergranular phase in the sample was observed and was attributed to the presence of a liquid phase during sintering. The addition of CuO to anatase phase TiO2 lowered the phase transformation temperature as well as the temperature of a shrinkage anomaly. This shrinkage anomaly is apparent in a temperature region showing a reversal of the shrinkage rate. The low-firing of CuO-doped anatase was attributed to the association of two distinct mechanisms: the formation of CuO-rich liquid phase at higher temperatures and a shrinkage onset present at lower temperatures associated with the phase transformation.
Original language | English |
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Pages (from-to) | 771-781 |
Number of pages | 11 |
Journal | Materials Research Bulletin |
Volume | 34 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1999 Mar 15 |
Externally published | Yes |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering