Abstract
The process of nitridation of hydrated titanate wires was examined by thermal gravimetric (TG) analysis in an NH3/Ar (50/50 vol.%) gas mixture, X-ray diffraction (XRD) measurement, field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) observations and X-ray photoelectron spectroscopic (XPS) analysis. The nitridation of the hydrated titanate nanowires was accompanied by a two-stage weight loss. In the first stage, occurring in the temperature range of 50-400 °C, the hydrated titanate wires changed to anatase-type TiO2 nanoparticles with the releasing of H2O molecules. In the second stage, occurring in the temperature range of 700-1000 °C, the TiO2 nanoparticles were converted to rock-salt-type titanium oxynitride (TiNxOy) nanoparticles. Subsequently, the TiNxOy nanoparticles were sintered each other at around 1000 °C. Under a gas flow of 100% NH 3, the hydrated titanate wires were completely changed to TiN xOy particles at a temperature greater than 950 °C, which was maintained for 2 h. It is possible to fabricate needle-like TiN xOy particles by selecting thick hydrated titanate wires as the starting materials.
| Original language | English |
|---|---|
| Pages (from-to) | 1813-1817 |
| Number of pages | 5 |
| Journal | Ceramics International |
| Volume | 37 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2011 Aug |
| Externally published | Yes |
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Keywords
- Hydrated titanate
- Needle-like particles
- Nitridation
- Titanium oxynitride
ASJC Scopus subject areas
- Ceramics and Composites
- Process Chemistry and Technology
- Electronic, Optical and Magnetic Materials
- Surfaces, Coatings and Films
- Materials Chemistry
Cite this
Formation of needle-like titanium oxynitride particles through nitridation of hydrated titanates. / Kiyono, Hajime; Tsumura, Tomoki; Kiyo, Tateki; Toyoda, Masahiro; Shimada, Shiro.
In: Ceramics International, Vol. 37, No. 6, 08.2011, p. 1813-1817.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Formation of needle-like titanium oxynitride particles through nitridation of hydrated titanates
AU - Kiyono, Hajime
AU - Tsumura, Tomoki
AU - Kiyo, Tateki
AU - Toyoda, Masahiro
AU - Shimada, Shiro
PY - 2011/8
Y1 - 2011/8
N2 - The process of nitridation of hydrated titanate wires was examined by thermal gravimetric (TG) analysis in an NH3/Ar (50/50 vol.%) gas mixture, X-ray diffraction (XRD) measurement, field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) observations and X-ray photoelectron spectroscopic (XPS) analysis. The nitridation of the hydrated titanate nanowires was accompanied by a two-stage weight loss. In the first stage, occurring in the temperature range of 50-400 °C, the hydrated titanate wires changed to anatase-type TiO2 nanoparticles with the releasing of H2O molecules. In the second stage, occurring in the temperature range of 700-1000 °C, the TiO2 nanoparticles were converted to rock-salt-type titanium oxynitride (TiNxOy) nanoparticles. Subsequently, the TiNxOy nanoparticles were sintered each other at around 1000 °C. Under a gas flow of 100% NH 3, the hydrated titanate wires were completely changed to TiN xOy particles at a temperature greater than 950 °C, which was maintained for 2 h. It is possible to fabricate needle-like TiN xOy particles by selecting thick hydrated titanate wires as the starting materials.
AB - The process of nitridation of hydrated titanate wires was examined by thermal gravimetric (TG) analysis in an NH3/Ar (50/50 vol.%) gas mixture, X-ray diffraction (XRD) measurement, field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) observations and X-ray photoelectron spectroscopic (XPS) analysis. The nitridation of the hydrated titanate nanowires was accompanied by a two-stage weight loss. In the first stage, occurring in the temperature range of 50-400 °C, the hydrated titanate wires changed to anatase-type TiO2 nanoparticles with the releasing of H2O molecules. In the second stage, occurring in the temperature range of 700-1000 °C, the TiO2 nanoparticles were converted to rock-salt-type titanium oxynitride (TiNxOy) nanoparticles. Subsequently, the TiNxOy nanoparticles were sintered each other at around 1000 °C. Under a gas flow of 100% NH 3, the hydrated titanate wires were completely changed to TiN xOy particles at a temperature greater than 950 °C, which was maintained for 2 h. It is possible to fabricate needle-like TiN xOy particles by selecting thick hydrated titanate wires as the starting materials.
KW - Hydrated titanate
KW - Needle-like particles
KW - Nitridation
KW - Titanium oxynitride
UR - http://www.scopus.com/inward/record.url?scp=79957497628&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79957497628&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2011.03.003
DO - 10.1016/j.ceramint.2011.03.003
M3 - Article
AN - SCOPUS:79957497628
VL - 37
SP - 1813
EP - 1817
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 6
ER -