Abstract
A new method for the reduction of MoO3 using Ca as a reducing agent was developed. A low oxygen Mo powder can thus be prepared by two-step reduction process: the first step reduction involves a contact type method while the second step reduction uses a non-contact type method involving Ca vapour followed by additional deoxidation. The oxygen concentration in the resultant Mo powder was ∼2800 ppm, which was much lower than that of commercial Mo powder (>4400 ppm).
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References
1.
Lee
BK
,
Oh
JM
,
Choi
GS
,
Rhee
KI
,
Lee
SW
,
Kim
SB
Lim
JW
: Mater. Trans. , 2012 , 53 , 425 –427 .
2.
Pavlina
EJ
,
Speer
JG
Tyne
CJV
: Scr. Mater. , 2012 , 66 , 243 –246 .
3.
Kim
GS
,
Lee
YJ
,
Kim
DG
Kim
YD
: J. Alloys Compd , 2008 , 454 , 327 –330 .
4.
Garg
P
,
Park
SJ
German
RM
: Int. J. Refract. Met. Hard. Mater. , 2007 , 25 , 16 –24 .
5.
Schulmeyer
WV
and
Ortner
HM
: Int. J. Refract. Met. Hard. Mater. , 2002 , 20 , 261 –269 .
6.
Afsahi
MM
,
Sohrabi
M
,
Kumar
RV
Ebrahim
HA
: Thermochim. Acta , 2008 , 473 , 61 –67 .
7.
Williams
B
: Met. Powder Rep. , 1991 , 46 , 30 –35 .
8.
Nartowski
AM
and
Parkin
IP
: Polyhedron , 2002 , 21 , 187 –191 .
9.
Aydinyan
SV
,
Gumruyan
Z
,
Manukyan
KV
Kharatyan
SL
: Mater. Sci. Eng. B , 2010 , 172B , 267 –271 .
10.
Abdelkader
AM
and
Daher
A
: J. Alloys Compd. , 2009 , 469 , 571 –575 .
11.
Baba
M
,
Ono
Y
Suzuki
RO
: J. Phys. Chem. Solids , 2005 , 66 , 466 –470 .
12.
Lim
JW
,
Mimura
K
,
Miyawaki
D
,
Oh
JM
,
Choi
GS
,
Kim
SB
,
Uchikoshi
M
Isshiki
M
: Mater. Lett. , 2010 , 64 , 2290 –2292 .
13.
Cross
JS
and
Schrader
GL
: Thin Solid Films , 1995 , 259 , 5 –13 .
14.
Lee
BK
,
Oh
JM
,
Suh
CY
,
Kim
HS
Lim
JW
: Mater. Trans. , 2013 , 54 , 238 –241 .
15.
Oh
JM
,
Lee
BK
,
Suh
CY
,
Cho
SW
Lim
JW
: Powder Metall. , 2012 , 55 , 402 –404 .