Biomedical Engineering Reference
In-Depth Information
2
00
250
300
350
400
450
5
0
0
1
2
0
0
250
300
350
400
450
5
0
0
8
363.79°C
90
10% La doped
BFO
1
4
4
Pure BFO
80
0
387.63°C
0
12
-4
70
-8
60
-1
-12
10
50
-16
363.38°C
-20
-2
376.96°
C
8
40
-24
30
-28
-3
6
200
250
300
350
400
450
500
200
250
300
350
400
450
500
Temperature (°C)
Temperature (°C)
(
a
)
(
b
)
Figure 13.31
Heat capacity and Heat l ow vs Temp. curve of Bi
1-x
La
x
FeO
3
(x=0.0 &
x=0.1).
4
2
0
0
250
300
350
400
450
5
0
0
200
250
300
350
400
450
5
0
0
40
1
8
20%
La doped BFO
2
30% La doped BFO
35
1
6
2
395.69°C
378.13°C
30
1
4
0
25
1
2
0
20
1
0
-2
15
8
-4
6
10
374.05°C
-2
4
5
389.86°C
-6
2
0
0
-5
-8
200
250
300
350
400
450
500
200
250
300
350
400
450
500
Temperature (°C)
Temperature (°C)
(
a
)
(
b
)
Figure 13.32
Heat capacity and Heat l ow vs Temp. curve of Bi
1-x
La
x
FeO
3
(x=0.2 & x=0.3).
When Bi
3+
ion is substituted with x=0.1 concentration of La
3+
ion, the
anomaly shit ed towards the high temperature as shown in Figure 13.31(b).
h e specii c heat curve of compound shows an exothermic peak at around
387 C but the heat l ow curve shows a thermal anomaly (an endothermic
peak) at temperature around 376 C.
Figure 13.32(a) shows the specii c heat and heat l ow curves of com-
pound with x=0.2 as a function of temperature. It is surprising that the
thermal anomaly in both specii c heat and heat l ow curves is shit ed
between the anomaly of pure and 10% La-substituted compounds. From
the i gure it is observed that the compound shows an exothermic broad
peak at 378 C in specii c heat curve and an endothermic peak at 374 C in
heat l ow curve.
