Facile Synthesis and Thermal Stability of Nanocrystalline Molybdenum Carbide1315
0100 200 300 400 500 600 700 800 900
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
Weight/%
Temperature/ oC
Figure 3. TGA curve of the as-prepared Mo2C sample in
flow ing air.
trioxide evaporated at this high temperature (about
740˚C). In a word, because of the ultrafine particles, the
sample can be oxidized thoroughly at about 550˚C. But
the sample has good thermal stability below 450˚C.
4. Conclusions
In summary, nanocrystalline molybdenum carbide (Mo2C)
powder has been prepared via a simple thermal route by
the reaction of metallic magnesium powders with mo-
lybdenum trioxide and potassium acetate in an autoclave
at 600˚C for 4 h. The product crystalline structure is
hexagonal. It consists of particles with an average size of
100 nm. The product has good thermal stability and oxi-
dation resistance below 450˚C.
5. Acknowledgements
This work was supported by Innovation and Promotion
of science-technology project of Zhejiang Province and
Department of Education of Zhejiang Province of China
under Grant No. 20070546.
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