Abstract
Recently published data on the precipitation of Ni–Zn ferrite powders prepared by the hydrothermal method have been analysed in a manner consistent with Avrami theory. The results indicate that the value of the time exponent is due to the growth of spherical particles in a solution which becomes progressively depleted of reactants. The analysis also indicates that the process can be considered to be one in which the particles all start growth from the initiation of the reaction.
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References
1.
Goldman
A.
: ‘Handbook of modern ferromagnetic materials’ ; 1999 , Kluwer .
2.
Tkacova
K.
,
Sepeldk
V.
and
Stevulovd
N.
J. Solid State Chem., 1996, 123, 100 .
3.
Lane
P. A.
,
Wright
P. J.
,
Crosbie
M. J.
,
Pitt
A. D.
,
Reeves
C. L.
,
Cockayne
B.
,
Jones
A. C.
and
Leedham
T. J.
J. Cryst. Growth , 1998 , 192 , 423 .
4.
Youcai
Z.
and
Stanforth
R.
Miner. Eng ., 2000 , 13 , 1417 .
5.
Lee
J. H.
,
Kim
C. K.
,
Katoh
S.
and
Murakami
R.
J. Alloy. Compd ., 2001 , 325 , 276 .
6.
Dawson
W. J.
: J . Am. Ceram. Soc ., 1988 , 67 , 1673 .
7.
Anil Kumar
P. S.
,
Shrotri
J. J.
,
Deshpande
C. E.
and
Date
S. K.
J. Appl. Phys., 1997, 81, 4788.
8.
Komarneni
S.
,
Fregeau
E.
,
Breval
E.
and
Roy
R.
J. Am. Ceram. Soc., 1988, 71, 26.
9.
Kim
C. K.
,
Lee
J. H.
,
Katoh
S.
,
Murakami
R.
and
Yoshimura
M.
Mater . Res. Bull ., 2001 , 36 , 2241 .
10.
Schikorr
G.
: Z. Aug. Chem ., 1938 , 212 , 33 .
11.
Byrappa
K.
and
Yoshimura
M.
‘Handbook of hydrothermal technology’ ; 2001 , Noyes .
12.
Byrappa
K.
: ‘Hydrothermal growth of crystals’ ; 1991 , Oxford , Pergamon Press .
13.
Wang
H.-W.
and
Kung
S.-Ch.
J. Magn. Magn. Mater. , 2004 , 270 , 230 .
14.
Avrami
M.
: J. Chem. Phys., 1939, 7, 1103.
15.
Johnson
W. A.
and
Mehl
R.F.
Trans. AIME , 1939 , 135 , 416 .
16.
Avrami
M.
: J. Chem. Phys ., 1940 , 8 , 212 .
17.
Avrami
M.
: J. Chem. Phys ., 1941 , 9 , 177 .
18.
Christian
J. W.
: ‘Theory of transformations in metals and alloys’ ; 1975 , Oxford , Pergamon Press .
19.
Xiang
L.
,
Yin
Y. P.
and
Jin
Y.
J. Mater. Sci., 2002, 37, 349.
20.
Adschiri
T.
,
Hakuta
Y.
,
Sue
K.
and
Arai
K.
J. Nanoparticle Res., 2001, 3, 227.
21.
Bashkirov
L. A.
and
Bashkirova
M. G.
VSES. Soveshch , 1968 , p. 216 .